HomeMy WebLinkAboutOrd 1162 07/13/1966
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ORDINANCE NO, 1162
BUILDING CODE
ARTICLE V - GRADE REGULATIONS
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Section 21-501: General lot grade maximums. No lot shall be graded
in such a manner as to raise the grade of such lot to any point higher
than a continuous grade level between the grade of the lots on either
side abutting such lot.
Section 21-502: Foundation grades and rules.
(a) All foundation grades shall be established in such a manner as to
achieve the free, natural and unobstructed flow of surface water.
(b) The Director of Engineering shall from time to time promulgate
detailed Rules, not inconsistent with this article, for the purpose of
determining foundation grades. Such Rules shall become effective by
filing same in the office of the Village Clerk and shall then have the
force and effect of'Bn ordinance of the Village. '
(c) Every application for a building permit shall show the foundation
grade and set forth a grading plan for the proposed construction,
determined in accordance with this article and Rules established
pursuant thereto. No building permit shall be issued unless such
foundation grade and grading plan is in accordance with the provisions
of this article and Rules issued hereunder.
(d) The foundation height at the 30' building line is 12" above
sidewalk. Use middle of lot for measurement. Top of foundation should
be 4" above finish grade. Side service walks and drives are to be a
minimum of 4" below top of foundation.
Section 21-503: Subdivision grade plans. The provisions of Sections
21-501 and 21-502 shall be supplemental to the requirements of the
Zoning Ordinance of the Village of Mount Prospect respecting any
subdivision approved pursuant to the provlsions of said Ordinance. No
building permit shall be issued by the Director of Building and
Zoning unless he has on file an approved lot grading plan for such
subdivision.
Section 21-504: Conformity with lot grading plan. Every building
constructed in a location for which a lot grading plan is on file,
pursuant to the provisions of Section 21-503, shall conform to said
lot grading plan.
Section 21-505: Compliance required prior to occu:!;)ancy permit. No
occupancy permit or other indication of approval of new construction
shall be issued or given by the Dir:.;ctor of Building and Zoning unless
and until all grade requirements set forth in this article have been
met.
Section 21-506: Altering grade levels. No grades within the
Village shall be disturbed or otherwise altered except as allowed
pursuant to a permit issued by the Director of Building and Zoning.
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ARTICLE X - AIR CONDITIONING AND OTHER
REFRIGERATION
Section 21-1001: Definitions. For the purpose of this article,
the following words or terms shall be given the meaning indicated:
(a)
"tiir conditioning system" shall mean an installation for
maintenance, by heat removal, of temperatures which are
not less than sixty (60) Degrees Fahrenheit.
(b)
The terms "air conditioning system" and "refrigeration
system" shall include any combination of equipment,
whether compressor or other type, by which heat is
removed from the air and from which the accumulated or
effluent heat is wholly or partially removed by the use
of water.
(c)
''Refrigeration system" shall mean an installation for
maintenance by heat removal, of temperatures which are-
less than sixty (60) Degrees Fahrenheit.
(d)
"System" shall mean any combination of apparatus, individual
unit, group or collection of units supplied with water
through any single customer service pipe connected to the
public water system.
Section 21-1002: Permit required. No person shall install, operate
or use any equipment for air conditioning or refrigeration which
requires a oupp1y of water from the system of the Village without
first having procured written permission therefor from the Director
of Building and Zoning.
Permits to install pipinG or connect uquipment shall be issued at
the office of the Director of Building and Zoning, but only in the
names of plumbers duly licensed under the applicable statutes of
the State of Illinois.
Section 21-1003: Application for permits.
(a) Applications for permits shall be made to the Director of
Building and Zoning and shall provide the following information:
(1)
(2)
(3)
(4 )
(5)
(6)
Name and address of the applicant.
Location of the premises where installation is proposed.
Name and address of the owner of the premises.
Names of manufacturers of the units requiring water.
Manufacturer's identification and classification of the
refrigeration units.
Manufacturer's rating of maximum refrigerative capacity
of tho unit or units under the conditions of the planned
installation. (Rating may be stated in tons per 24 hours
or in Btu per hour.)
Horsepower of compressor prime mover, if unit is of
compressor type.
Where water conservation devices are required, the manu-
facturer's name, identification, classification and size
of the conservation equipment.
(7)
(8)
(9) Elevation and plan showing general piping arrangement
and details of all points of connection to building
supply water piping (piping direct to condenser units,
makeup supply into tower pen and so forth).
(10) Such additional information as shall be required by
the Director of Building and Zoning.
(b) ,Applications shall be signed by the owner or tenant, and applica-
tions for installation shall designate a plumber duly qualified to
receive permits under the applicable provisions of this Code.
Section 2l-l00L: Fees. II fee sh~ll be paid at the time of application
for a permit to cover one (1) inspection of the installation. The fee
shall be in the sum of Ten Dollars ($10.00) for the first ton, plus
TWo Dollars ($2.00) for each additional ton of capacity. For each
additional inspection required because of condemnation of work or
because of premature request for inspection, an additi.onal charge shall
be made equal to seventy-five per cent (75%) of the original fee.
Section,2;1-loo5: Notice of completion. 1'1fithin forty-eight (L8) hours
following the completion of any work authorized by a permit issued
hereunder, a notice of completion and request for inspection shall be
made to the office of the Director of Building and Zoning by the
plumber receiving the permit.
Section 21-1006: Final inspection. After final inspection and
approval of the instllation, a permit to operate or use the equipment
will be issued at the office of the Director of Building and Zoning.
Section 21-1007: Capacity requirements.
(a) Systems with a capacity of three (3) tons (per 24 hours) or less
shall not use water directly (or indirectly, except when used with
conservation equipment) from the publiC supply.
(b) Systems with a total capacity of more than three (3) tons (per
2L hours) but not exceeding five (5) tons (per 2L hours) may use
water directly from the public supply, at a rate not exceeding 2.0
gallons per minute per ton if the water temperature is seventy-five
(75) Degrees Fahrenheit or less, or 3.0 gallons per minute per ton
if it is above seventy-five (75) Degrees Fahrenheit; prOVided they
are equipped with an automatic regulating valve which will (1) stop
the flow of water when the refrigerating machine is shut down and
(2) throttle the flow of water down to the momentary requirements of
the system.
(c) All systems having total capacities exceeding five (5) tons
(per 24 hours) shall be equipped with evaporative condensers, cooling
towers, spray ponds or other water-cooling equipment. This equipment
shall be of sufficient capacity to insure conformance with the
requirements of the following table for makeup water when operating
under full loading at maximum summer temperatures.
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11aximum Allowable 1'!Tater Use
1.vater Hardness
ppm
o - 139
140 - 199
200 - 254
255 - 339
340 - 424
425 and over
lVIaximum Use
qpm/ton
0.1
0.15
0.2
0.3
0.4
0.5
Section 2l-l008: Operation and discharge.
(a) Installations which operate with the use of water directly from
the public supply system shall be equipped with a suitable brass-bodY9
brass-fitted check valve, preceded by a manually operated gate valve
of the same size, both of said valves to be installed in the branch
supply line to each unit. The water meter shall be installed between
the two valves.
(b) Discharge connections for the disposal of waste waters shall be
in strict accordance with applicable rules and regulations of state
and local health and regulatory bodies.
(c) Cooling waters which are to be re-used for other purposes shall
be provided with free, above-the-rim discharge before entering other
equipment; otherwise, permission shall be obtained in writing from the
Director of Building and Zoning, approving the proposed connections
and use.
(d) On installations other than those described above, there shall be
a physical break between the public water supply piping and the piping
of the installations, so arranged as to make impossible back siphonage
to the public water supply system.
Section 2l-1009: Revocation of permit. Any permit which is issued
under these Regulations to operate or use equipment may be revoked
by the Director of Building and Zoning, for anyone of the following
reasons:
(a) Failure of the holder of the permit to discontinue using
water for the purposes covered by the permit immediately
upon notice to do so issued by the Director of Building and
Zoning during an emergency or to forestall an impending
emergency.
(b) Alterations, changes of equipment or p1p1ng, improper
operation or lack of maintenance which results in conditions
which (1) are hazardous to the potable water supply either
within the premises or in supply mains, or (2) cause
unnecessary waste of water.
(c) The use of water is found to exceed the quantities per-
mitted under Section 21-1006 (c) of this article.
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Section 21-1010: Discontinuance of service.
fa) The Director of Building and Zoning is ~uthorized, in his
discretion, to discontinue water service for failure to correct any
violation of the provisions of this article within thirty (30) days
after receipt by the permittee of written notice of such violation;
the mailing of such notice by certified mail to such permittee at
the address stated in the application for the permit under Section
2l-1002 of this article shall be sufficient evidence of the receipt
of said notice by the permittee for the purposes of this subsection.
(b) Licensed plumbers guilty of any violation of any of the rvles
and regulations herein shall, in addition to other penalties elsewhere
provided, be prohibited from securing further permits from the Director
of Building and Zoning fo~ the installation of equipment covered by
this article.
Section ~l-lOll: Central air conditioning compresso~ units~
No person shall install, operate or use a central air conditioning
compressor system without first having obtained a permit therefor from
the Director of Building and Zoning.
The fee for such permit shall be Ten Dollars ($10.00),
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ARTICLE XII - REGULATIONS AND STANDARDS FOR
CONSTRUCTION OF SINGLE-FAI1ILY
lJrJ'ELLINGS
Section 2l-120l: Scope of ~rticle XII regulations.
(a) The provisions of this Article XII shall apply to and regulate
the construction, alteration, removal~ demolition, equipment, use and
occupancy, location and maintenance of all buildings and structures
used as single-family residences not over two (2) stories and an attic
in height. lrJhen no provision regulating the detail of construction of
such single-family residences is found in this Article XII or elsewhere
in this Chapter 2l, then such construction detail shall be regulated
by the provisioDS of the Basic Building Code, as adopted and amended
by Article I of this Chapter 21.
(b) Specific references throughout this article made to technical
bulletins~ materials, standnrds and specifications prepared by
institutes, societies, technical societies or government agencies
(as listed in Sections 21-1228 and 21-l229) shall refer to practices,
methods, or materials acceptable to the Director of Building and
Zoning in satisfying the requirements of these Regulations.
Section 21-l202:
Minimum planning requirements: tight, Ventilation
and Safety.
(I) ) General.
(l) Install windows in outside walls to provide natural
light and ventilation in all habitable rooms.
(2) '~indows in hiJbitable rooms, whose areas provide the
light and ventilAtion necessary to comply with the
following requirements~ shall be considered as
required windows. All windows in addition to re-
quired windmvs, and also l'l]'indows in rooli'iS other than
habitable rooms, shall be considered non-required
windows.
(3) The Area of glazed portions of doors located in
exterior walls may be included when necessary to meet
the minimum requirements of this subsection.
(4) 'fhere window or drain openings are provided below
grade~ the same shall be protected with metal gratings.
(b) Habitable rooms. Habitable rooms sholl be all rooms designed to
be used for living, sleeping, eating or cooking, and shall conform to
the following:
(1) Each habitable room shall have required windows with
a total glass area of not less than ten (10) per cent
of the floor area of such room and with a ventilating
area capacity of not less than five (5) per cent of
the floor area of such room.
(2) ~There a mechanical exhaust is permitted, it shall be
vented to the outside.
- 1 -
(c) Alcoves. Alcove shall mean a recess connected or at the side of a
larger room, subject to the following requirements:
(1) Unless separately lighted and ventilated by windows
provide the required window area, any alcove adjoining
a habitable room shall be taken as part of that room
in computing the required window area for such habit-
a ble room.
(2) The common w~ll between the alcove and the habitable
room shall contain an opening, the area of which shall
be not less than eighty (80) per cent of the area of
the entire w~ll on the alcove side.
(d) Bathrooms and water closet compartments. Bathrooms and w?ter
closed compartments shall be ventilated by one of the following means:
(1) By window or skylight, such window or skylight to be
loc~ted in exterior walls or roofs, with the light
and ventilation are9 thereof to be not less than
three (3) square feet.
(2) By a vent in or near the ceiling with a continuous duct
connection to outside air with:
(A) gravity exhaust, connected to louvered roof vent,
with a minimum duct dimension of three and one-
half (3~) inches and minimum area of forty-eight
(L8) sqUAre inches; or
(B) a mechanical exhaust, capable of one (1) complete
air change every ten (lO) minutes.
(e) Open basements. Open basements shall be provided with light and
ventilation by windows or doors, in exterior walls with both glazed and
ventilating area of not less than two (2) percent of the floor area.
(f) utility rooms. Utility rooms shall me~n a room or an area
enclosed or unenclosed, used for major housekeeping appliances, laundry
facilities, or water heating devices, and shall be ventilated so as to
meet the requirements for habitable rooms set forth in subsection
21-l202 (b) above.
(g) Heater rooms. Heater room shall mean an enclosed room or area
where the central heat-producing device is located and shall be pro-
vided with fixed ventilation for any confined space which encloses
heating equipment, by means of ducts arranged to supply continuous
circulating air from the outside. Such duct shall be screened and
have a total free area equal to one (1) sqware inch for each one
thousand (1,000) Btu input rating of all fuel-burning equipment.
(h) Crawl spaces.
of floor joists to
ing requiremen~,l}:
Crawl space shall mean that area from the bottom
the ground below, and shall conform to the fo11ow-
- 2 -
(l) For unheated crawl space, install at least four (4)
foundBtion wall ventsJ locntec near the corners of
the crawl space, and having a free ventilating area
equal to 1/160 of the ground area of the cr~wl space,
computed in square feet.
(2) For heated crawl spaceJ install at least two (2)
foundation wall vents, located so as to provide
effective cross ventilntion and having a free venti-
lating area equal to 1/1200 of the ground area of
the crawl space, computed in square feet.
(3) For a crawl space, one side of which is open to a
ventilated basement, vents shall not be required
provided that the area of such opening, exclusive of
structural supports such as piers, chimney founda-
tions, etc., is more than two (2) per cent of the
floor area of such ventilated basement.
(L) ^ll required vent openings shall be covered with
corrosion resistant screer.ing, with a mesh of not
less than eight (8) per inch.
(5) The floor of all crawl spaces shall be levelled with
two (2) inches of coorse stone granular material
(1/2" - 5/8") OVGr which two (2) inches of concrete
shall be poured. The concrete shall be pitched to
a capped drainJ or m~y be pitched in another manner
approved by the Director of Building ~nd Zoning.
(i) tlttics and air space between ceiling "md flat roofs. Attic air
space shall mean a space between the ceiling beams of the top habitable
story and the roof rafters, and shall meet the following requirements:
(l) Effective fixed ventilation shall be provided in all
spaces between roofs and top floor ceilings, by
replaceable or non-ferrous screened louvers,
sixteen (16) mesh.
(2) The net ventilation areA for each separate space shall
not be less than 1/300 of the area of the house
measured at the top plate. Where possible vents shall
be located so 3S to provide effective cross ventilation.
Section 21-l203: Hinimum floor area requirements.
(a) Minimum floor area requirements - Houses. Except as otherwise
provided by ordin3nceJ minimum floor areas of houses and rooms therein
shall meet the following standards:
(l) Minimum floor areas - Total structure. The minimum
floor area for the total structure or building
sh,11l be:
- 3 -
Type of structure
Minimum Area
Square Feet
One-story ranch house ..................... l250
Split-level or raised ranch house ......... ll70
One and one-half story house .............. 950
'!We-story house ..o, 0 0 . 0 . 0 . 0 . . 0 0 (l 0 (I . .. . (I 0 eo. . 800
The foregoing minimum floor area shall be measured at
the first floor on the main floor level from the
outside of exterior walls.
(2) Minimum floor areas - Living, dining and cooking rooms. The
m1n1mum floor area requirements for living, dinihg and
cooking rooms shall be:
7~r;Je of Room
Minimum .Area
Square Feet
Living and dining when in one room ........ 310
Living only in one room when dining
room space is provided in kitchen
or separate room ..................... 220
Kitchen cooking only (including area
occupied by equipment) ............... lOO
Kitchen and dining when dining space
is not provided elsewhere ............ 200
Kitchen and laundry (including area
occupied by equipment) ............... 140
Kitchen, dining and laundry............... 200
Utility room (including area occupied
by equipment) ........................ lOO
Kitchen, laundry and utility.............. 200
Minimum floor area for the foregoing shall be measured
from the inside of all finished walls.
(3) Minimum floor areas - Sleeping rooms. The minimum floor area
requirements for sleeping rooms shall be:
Additional bedrooms
140
l20
lOO
r.iajor bedroom .... 0 . . 0 0 . . . . 0 0 .. .. (I . 0 . 0 . . 0 . . . .
See ond bedroom ... 0 It 0 . . 0 . 0 Cl 0 0 . e 0 0 . . (I 0 0 . . 0 . .
(4) Minimum floor areas - Other rooms. The minimum floor area
requirements for other rooms shall be:
~1ajor bathroom ..0.0... 0 0 . .0.0. . . . 0 . . 0 .0. G . 40
Master bedroom closed ..................... 14
Other bedroom closets (at least one each). 10
All other habitable rooms not
herein above set forth ............... 100
Minimum floor area for the foregoing shall be measured from
the inside of all finished walls.
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(b) Minimum floor area requirements - Garage dimensions. ~1inimum
dimensions for garages shall be as follows:
Feet
One-car garage:
Inside width
Inside depth
0...00....000000.000000000,0
11
l~~
9
.0..00....000.0.00000.0.0 eo
Door width .. 0 . 0 0 . . 0 III 0 0 . 0 . III 0 0 0 0 III . 0 (\I 0 . . . 0
Two-c ar garago:
Inside width 0 0 . III 0 0 . " 0 . e III III 0 0 0 III III 0 0 0 0 0 0 . 0 .
Inside depth Ill. 0 0 0 .. . 0 0 . 0 III 0 0 0 0 0 e . 0 0 . . 0 0 0 .
Door width
19
1~12
16
(c) Minimum space requirements for heating units. Minimum space
req~irements for heating units shall conform to the following:
(l)
(2)
0)
Space shall be provided within the building for the heating
unit or system.
Clearances shall be provided for maintenance and repair.
Clearances shall be provided for fire safety, the dimension
bf which shall be determined with referen8e to the in-
sulation of the heating unit, combustibility of walls,
floor and ceiling, as required by the Nptiona1 Board of
Fire Underwriters' Gas and Oil Equipment List.
(d) Hinimum storage space
(1) Minimum volume: 600 cubic feet each living unit in
addition to minimum bedroom closets.
(2) Height: Space less than 4 feet in height will not be
considered as providing storage space '~nder these
requirements.
(3) Location: Closets, utility room, attic, basement or
attached garage, closets which are in addition to
required bedroom closets may be included as storag8
space, work space and equipment passa~e space in
utility room may not be included as storage space,
portions of garage included as storage space must be
separately enclosed and fitted with a door.
Section 21-1204: Habitable basement rooms.
(a) Habitable rooms, other than recreation or plAyrooms shall not
be located in a basement.
(b) Habitable basement room:s shall compl:;r wi-Lh the requirements set
forth for main floor rooms i-1ith respect to privacy, light, ventilation
and floor area.
(c) The finished floor for a habitablo bQse~ent room shall not
exceed two (2) feet six (6) inches below out3ide finished grade at
required windows.
(d) flreaways for habitable basement rooms shall have a mlnlmum
width of two (2) feet measured perpendicular to the fact of the
building wall, and increased one (1) inch for e~ery inch of depth
exceeding two (2) feet. The head of the window, in all cases, shall
be at or above the top of the areaway wall.
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(e) Concrete floor slabs shall not be used in lieu of basement or
crawl spaces. BAsement or crawl spaces shall be required under the
living room, dining room, kitchen, bathroom and no fewer than three
(3) bedrooms in every single-family residence.
Section 21-1205: Porches and terraces.
(a)' Porches and terraces shall have a minimum dimension from the
face of the building of four (~) feet in all cases where such porch
or terrace has a height of more than two (2) risers between grade
and first floor.
(b) Guard rails for stairs to porches or terraces shall be provided
when:
(l) The porch or terrace is more than twenty-four (2~) inches
above grade and the centerline of the stairs leading thereto
is on the centerline of the exterior door of the house.
(2) The por~h or terrace is more than sixteen (l6) inches above
grAde and the centerline of the stairs leading thereto is
not on the centerline of the exterior door of the house.
(3) The exterior stairs leading to the porch or terrace are
more than three (3) risers above grade level.
section 21-1206: Ingress and egress.
(3) Ingress and egress shall be provided according to the fol1owing~
(l) Living units. E~ch living unit shall be provided with two (2)
means of ingress and egress without passing through any other
living unit.
(2) ~ttics. Ingress and egress shall be provided in attics by
means of scuttles minimum 24" by 2~", disappearing or built-in
stairways.
(3) Crawl spaces. Ingress and egress to crawl spaces shall be
provided by means of an opening not less than thirty (?~) inches
nor forty (Lo) inches high.
(~) Areaways. Areaways shall be equal to the area of access.
(5) Basements. Basements shall be provided with direct ingress
and egress to the outside by means of a door or a window
having an opening of at least twenty-four (24) inche$ wide
and thirty (30) inches high, stool not more than three (3)
feet above floor level. A basement stairway leading to a
breezeway or garage at grade level may be considered an
outside entrance to a basement.
(6) Bathrooms. E~ch bedroom shall have access to a bathroom with-
out passing through another bedroom and each habitable room
shall have access to each other habitable room without passing
through a bedroom.
':'"6' -
(b) Access to bathrooms shall not:
(1) Open directly into a kitchen where such bathroom is the
sole bathroom.
(2) Provide the sole access to any other room.
(c) l{here only one (1) bathroom serves an entire living unit, such
bathroom shall not be located in the basement.
Section 21-1207:
shall be~
Minimum ceiling heights. JVlinimun ceiling heights
Basements...................,...........7'0" clear under joists.
Minimum floor of any living unit ........8'0" clear for at least
75% of the total floor
area.
Second story of any living unit
Level ceilings .............,...... 7'611 clear
Sloping ceilings.................. 7'611 f)r not less than
50% of that floor area
having five (5) feet
or more headroom
Section 21-1208: Doors.
(a) All exterior doors shall be not less than the following dimen-
sions~
Main entrance doors ............... 2'10" wide by 6'8" high
Service entrance doors ............ 2' 8" wide by 6' 8" high
(b) All interior doors shall be not less than the following dimen-
sions:
All ha bi ta ble rooms ............... 2' 4" wide by 6' 6 II high
Bathrooms and powder rooms ........ 2' L" wide by 6' 6" high
(c) A door shall be provided for each opening to a bedroomj bath-
room and toilet compartment.
Section 21-1209: St~irway design.
(a) There shall be continuous clear headroom on stairways, of a
minimum of six (6) feet six (6) inches, measured vertically from the
front edge of each tread to a line parallel with the stair run.
(b) Stairways shall have the following minimum widths:
Main stairs ....................... 2'911 cleBr of hand rail
B8sement stairs ........,.......... 2'6" clear of hand rail
(c) All treads shall have a minimum width of nine and one-half (~~)
inchesj c1e~r of the tread above.
(d) No riser shall be more than eight (8) inches, and all risers
shall be of the same size for anyone story.
(e) l1inders shall have a tread width measured fifteen (15) inches
from the converging end, at least equal to the tread width of a
straight stair run, unless the width of the tread at the converging
end is six (6) inches or more.
- 7 -
(f) Stairway landings shall have a width equal to that of the stair.
(g) Stairways shall have a contfnuous hand rail on at least one side
of each run on each stairway and stair well.
(h) A guard rail shall be provided around all stairways of more than
three (3) risers.
Section 21-l210: Fire limits. Within the fire limits, residential
buildings shall comply with the requirements of ordinances relating
to construction within such limits.
Section 2l-1211: Load design.
(a) All parts of dwellings, and Accessory buildings and structures,
shall be designed, constructed and maintained to support safely their
own weight And all other loads and forces to which they may be
subjected.
(b) For design purposes, assumed minimum live loads (uniformly dis-
tributed) shall be:
(l) Ceiling or attic floor joists (no storage) None
Attic floors (limited storage only....... 20 lbs. per sq. ft.
All other floors..... GO......... GO....... Lo Ibs. per sq. ft.
(2) Girders: Dead loads of floor, partition and ceiling con-
struction; plus the assumed live loads of floors; plus
combined dead and live loads of roofs.
(3) Roofs (either pitched or flat) ........... 20 Ibs. per sq. ft.
normal to the roof
surface
(c) Wind load minimum design requirements shall be:
(1) On vertical faces ........................ 20 Ibs. per sq. ft.
horizontally, any
direction
(2) Roofs, or any parts thereof with slopes greater than thirty
(30) Degrees: 20 Ibe. per sq. ft. acting inwarc normal to
surface, on windward slope only.
(3) Lifting force: 20 1bs. per sq. ft.
To prevent splitting or overturning, anchor roofs to walls
and columns, and anchor walls and columns to foundations.
(d) l.fuen special conditions exist or arise during construction necessi-
tating additional precautions in load design, the Director of Building
and Zoning may require construction methods in excess of these minimum
standards.
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Section 21-l2l2: Minimum vapor barrier standards.
(a) l1aterials shall have a vapor transmission rate of 1.5 Perms or
less. Generally acceptable are:
55 1bs. per 108 sq. ft. of smooth roofing
Foil or foil-backed board only when butted over studs
or 2" x 4" backing material
Duplex 1aiminated papers 30-60-30
Duplex papers coated with metal oxides
Insulation backup paper (treated)
Polyethylene film
(b) Install independent vapor barrier (or a vapor barrier integral
with insulating material) immediately above the ceiling interior finish
where there are unheated spaces above such ceiling.
(c) Install immediately back of interior wall finish a vapor barrier
where exterior co-efficient of heat transmission is not more than
0.16 Btu per square foot, per degree of temperature difference.
(d) All vapor barriers shall be applied tightly against all electrical
out1etsj registers, or framed openings.
(Section 2l-l213~ Thermal insulations.
(a) For unheated crawl spaces, floors shall be insulated by any of
the following means:
(1) Foil reflective type on both sides between joists, maintining
a two (2) inch air space between bottom of floor and foil)
installed so that there are no openings at ends of joists.
(2) One-half (1/2) inch rigid insulation board fastened to
bottom of floor ljoist, installed so that there are no
openings at ends of joists.
(3) One (l) inch blanket insulation, or any other type of
insulation better than the above.
(b)
(1)
In unheated crawl spaces, insulate ducts and pipes as follows:
Warm air ducts and plenum shall be covered with insulation
material with a minimum thickness of two (2) inches.
(2) Return air ducts covered with insulation material of a
minimum thickness of one (1) inch.
(3) Sewer and water supply pipes shall be covered with an
insulation material with a minimum thickness of one (1)
inch.
(c) For heated crawl spaces, the following requirements sh3l1 be
followed:
(1) Install insulation with a mlnlmum thickness of one (1) inch
on all surfaces of foundation walls adjacent to the crawl
space.
- 9 -
(2) Insulation shall be waterproof and non-c9pillary, inorganic
and termite and fungi resistant.
(3) Insulation shall be installed to extend up to the underside
of the subf1oor, from six (6) inches above ground level, and
shall be fastened to foundation walls,
(d) Insulation for exterior perimeters of concrete floor slabs shall
meet the following requirements:
(1) Such insulation shall be at least one (1) inch in thickness
at the edges.
(2) Where there are heating ducts in floors, such insulation shall
be at least one and one-half (~) inches at the edges of the
slab,
(3) Such insulation shall be extended down the side face of the
foundation wall for a distance of at least eighteen (18) inches.
(L) Insulation shall be waterproof and non-capillary, inorganic
termite and fungi resistant,
(e) For ceiling insulation the following requirements shall be met:
(l) Ceiling insulation shall be not less than four (L) inches
in net thickness, and fire resistive and flame proof,
(2) In place of the above, foil insulation of an equivalent
rating shall be acceptable.
Section 21-l2lL: Heating requirements.
(a) Dwellings shall be provided with a heating unit capable of main-
taining an interior temperature of seventy-two (72) Degrees Fahrenheit
under conditions of an exterior temperature of ten (lO) Degrees below
zero Fahrenheit together with an outside wind velocity of fifteen (15)
miles per hour, based on heat loss calc u1ations in accordance with
the standards of the American Society of Heating 2nd Ventilating
Engineers.
(b) Such heating unit shall be constructed and installed in strict
accord with the applicable current published standards, requirements
and recommendations of the National rire Protective Association,
National Board of Fire Underwriters, 1'lmerican Standards I,ssociation,
and the American Society of T"echanical Engineers. Labeling and list-
ing by the following shall be accepted as conforming with such equip-
ment design standards: Underwriters Laboratories, Inc.; American
Gas i~ssociation; or /lmerican Society of 1'Hechanica1 Engineers.
(c) Proper clearance shall be provided around all heating equipment
installations so as to allow access, repair and maintenance.
(d) Smoke pipes, where extreme heat And location may be hazardous to
human occupancy, shall be insulated from the furnace to the chimney
with a minimum of one-fourth (l/L) inch of asbestos material.
- 10 -
(e) Insulation of all heat-producing devices shall be such that the
temperature rise on surrounding frame construction will not exceed one
hundred and sixty (160) Degrees FAhrenheit.
Section 21-l215: Foundations.
( a) Walls and piers shall conform to the following requirements ~
(1) They shall be extended to solid ground, and no footings shall
be placed on filled ground.
(2) The bottom of such footing shall be not less than three (3)
feet six (6) inches below finished grade level, except where
placed on solid rock.
(3) During construction of same, adequate measures shall be
taken to protect agAinst freezing, and no concrete shall be
poured on frozen groundd
(b) Crawl spaces shall be constructed so that the ground level is at
least thirty-siX (36) inches bel~ the bottom of the floor joists and
girders. The ground. under the crawl space shall be leveled, covered
with two (2) inches of coarse stone granular material (1/2" - 5/8"0,
and topped with two (2) inches of poured concrete.
(c) fJll debris, sod, tree stumps and other organic material within
the area occupied by the dwelling shall be removed prior to placing
found ations.
Section 21-1216: Concrete and masonry materials.
Masonry materials described below apply to all masonry and concrete
work.
(a) Cement:
(l)
(2)
(3)
Portland cement. For requirements see ASTIl C l50-56.
Prepared masonry cement for mortar. For requirements see
AS'IN C 91-55T.
Pozzolanic materials, such as fly ash, shall not be sub-
stituted for any portion of cement without the knowledge
and consent of the Director of Building and Zoning. When
used as a replacement for cement, manufacturer's recommend-
ations shall be followed and subjected to testing by an
approved laboratory.
(b) Aggregate:
(l)
(2)
Sand: Clean, hard and sham, free from harmful materials,
graded according to intended use. For requirements see
ASTH C 35-56T.
Coarse aggregate: Crushed stone or gravel: Hard, strong,
crystaline rock, properly graded, clean and free from shale
or other soft material.
Light weight aggregate.
0)
For requirements, see ASTM C 330-53T.
(c) 1rJater: Clean and free from harmful material.
- II -
( d ) Lime:
(1) Hydrated lime. For requirements see AS'IM C 207-49.
(2) Quick lime, slake thoroughly. For requirements see ASTM C 5-26.
(e) Brick:
(1) Face brick. For requirements see AS'IM C 2l6-50.
(2) Common brick. For requirements see AS'IM C 62-50.
(A) Selected hard-burned common brick may be used for
facing of exterior and interior walls.
(B) Salmon Or soft brick may be used in interior walls
when not exposed, and for backup work.
(3) Fire brick. For requirements see FS-HH-V-671d.
(4) Concrete brick. For requirements see ASTM C 55-52.
(f) Structural hollow clay tile:
( 1)
(2)
(3)
(4)
Sound, kiln-burned units, free from defects that would impair
the strength or permanence of the construction.
Load-bearing tile. For requirements see ASTM C 34-55.
Non-load bearing tile. For requirements see AS'lM C 56-52.
Glazed or unglazed facing tile. For requirements see
AS'lM C l26-52T.
(g) Concrete masonry unit. For requirements see ASTM C l29-53,
AS'IM C 145-52, and AS'IM C 90-52. Sound and thoroughly cured.
(h) Stone:
(1) Rubble and cut stone: Good quality building stone.
(2) Cast stone. For requirements see ACI 704-44.
(i) Flue lining: Glazed fire clay and vitrified tile, free from
cracks or other defects.
(j) Glass block. For requirements see NBFU-Bldg. Code-55.
Section 2l-l217:
Concrete work.
(a) General:
(l) Materials. For requirements see Section 2l-l2l6.
(2) Water content not to exceed seven (7) gallons of water per
bag of cement, including moisture in the aggregate (except
as noted).
(3) Maximum slump, six (6) inches (except as noted).
(4) Retempering of concrete not permitted.
(5) Calcium chloride may be used as an accelerator but shall
not exceed two (2) pounds per bag of cement.
(b) Quality of concrete:
_ 1? _
(1) Job mix: Minimum cement proportions.
(A) One (l) part of Portland cement two and one-half (~~)
parts sand, three and one-half (3~) parts coarse
aggregate, one and one-half (l~) inches maximum size.
(B) One (l) part Portland cement, two and one-half (21~)
parts sand, three (3) parts coarse aggregate, three-
fourths (3/L) inch maximum size.
(2) Commercial ready mix.
(Ii)
(B)
(C)
Minimum Port1~nd cement content: five (5) bags per
cubic yard.
Water shall not be added at the job.
Mixing period shall not extend beyond one and one-
half (l~) hours per batch. (Where an accelerator is
used mixing should not exceed one (1) hour per batch).
(3) Exposed concrete (pavements, sidewalks, curbs and gutters, open
s labs:1 e tc . ) :
(il) Minimum cement contains five and one-half (~) bags per
cubic yard with three (3) per cent to six (6) per cent
air entrainment.
(B) Naximum slump: four (L) inches.
(C) Maximum water content: six (6) gallons per bag of
cement including water in the aggregates, except seven
(7) gallons per bag with three (3) per cent to six (6)
per cent air entrainment.
(4) Hardened concrete: To determine the quality of hardened
concrete, the water-cement ratio for a tested compressive
strength shall be found in table 5, f1Compressi ve strength
of Concrete for Various Nater-Cement Ratios 11 of !Recommended
Practice for Selecting Proportions for Concrete 11 (ACI 613-54)
published in the Proceedings of the American Concrete Institute,
Vol. 5l. The water-cement ratio thus established will de-
termine whether or not the concrete meets the requirements
of these Regulations.
(c) Reinforced concrete: The design and construction of reinforced
concrete shall be in accordance with the provisions of the "Building
Code Requirements for Reinforced Concretell (ACI 318-56) published in
the Proceedings of the American Concrete Institute, Vol. 52.
(d) Concrete forms:
(1) Double forms required for all concrete foundation walls.
(2) Side forms required for footings.
(3) Build tight, straight, plumb, and brace rigidly.
(L) Do not remove until concrete has thoroughly set.
(5) Remove all forms, spreaders and stakes before backfilling.
(e) Placing concrete:
(l)
(2)
Place continuously unless otherwise allowed by the Director of
Building and Zoning.
When not placed continuously, clean, score, and wet the top
surface of the concrete before continuing. Key all vertical
joints.
- 13 -
(3) Spade and rod concrete thoroughly in form work. Place in
horizontal layers not more than twelve (12) inches thick.
(f) Protecting and curing concrete:
(1)
( 2)
Concrete
five (5)
Concrete
than:
(A) Seventy (70) Degrees for three (3) days or fifty (50)
Degrees for five (5) days for normal concrete.
(B) Seventy (70) Degrees for t~o (2) days or fifty (50)
Degrees for three (3) days for high early strength
concretes.
shall be protected from drying for a minimum of
days.
shall be maintained at temperatures of not less
(g) Subjecting to loads: Allow sufficient time for strength of
concrete to develop before subjecting to loads or traffic.
(h) Footings:
(1) General:
(A) Design for proper distribution of superimposed loads.
(B) Haterial: cast-in-place concrete.
(C) Bear on solid, unfilled ground.
(D) Reinforce with steel bars ~here footings cross or bear
on filled trenches or other unstable soil.
(E) Footing dimensions listed below are based upon soils of
average bearing capacity (3,000 p~unds per square foot).
For soils of lesser bearing capacity of where unusual
loading conditions exist, larger footings will be
required.
(2) 1"'a1l footings: Hinimum dimensions for spread footings shall
be the foundation wall thickness in depth by double the
foundation wall thickness in width.
0) Pier, post and column footings: Thve1lings: Minimum area,
six and one-fourth (6~) square feet; thickness, one and one-
half (l~) times the projection, minimum twelve (12) inches.
(Not permitted under exterior walls.)
(b) Chimney footings:
(A) Dwellings: Minimum thickness, twelve (12) inches;
minimum projection each side, c:_:: (6) inches.
(B) Pour integral with wall footing when chimney occurs
in outside walls or inside bearing wall.
(i) Footing drain tile. For req~1ircmen t.s see AS m C 4 -55 (5~ T) .
(1) Required outside (or insico) of basement and crawl space
footings in a manne::' arproved "ty the Director of Building and
Zoning. Minimum diameter, four (b) inches.
(2) Cover tile with eight (8) inches of gravel or crushed stone
of which ninety-fi~3 (95) per cent passes three-fourths (3/4)
inch mesh, and less than five (5) per cent passes three-
eights (3/8) ~Gsh.
(3) Connect with tight-joint glazed tile to storm sewer, dry well,
or other outlet.
(4) Connection between drain tile and sewer shall only be made
as outlined in Plumbing Code of Mount Prospect. See 5.9,
5.9.1 and 5.9.2.
- 111 -
(5) A sump pump with overhead sewers will be required if
deemed necessary by the Director of Engineering and the
Director of Building and Zoning.
(6) standard gauge cast-iron soil pipe is required in all
buildings and shall extend four (4) feet outside the
foundation.
(j) Concrete foundation walls cast in place. (For masonry unit founda-
tion walls requirements see Section 21-1218 (b):
(1)
General~
(il) Materials. For requirements see Section 21.1216.
(B) 1~alls supporting frame construction: E:ictend concrete not
less than six (6) inches above adjoining outside finished
grade.
(C) ttfalls supporting masonry veneered wood frame: E:ictend
foundation so that wood portion of wall is not less than
six (6) inches above outside finished grade.
Hinimum thickness:
(A) Not less than ten (lO) inches or the width of the wall
support, whichever is greater.
(B) Supporting porch slabs, steps and one-story wood frame
structures without basement, minimum eight (8) inches.
(C) Interior walls not subject to lateral pressure, minimum
six (6) inches.
(D) .All other walls, minimum ten (lO) inches.
Girder pockets: Provide four (L) inch end bearing on main
wall for girder. Form pocket for girder one (1) inch wider
than girder.
Sill anchor bolts to be installed:
(11) Diameter, one-half (l/2) inch minimum.
(B) Hinimum length, ten (lO) inches.
(C) Provide washer under nuts on bolts.
(D) Spacing, not more than eight (8) feet on center; minimum
two (2) bolts in each piece.
Foundation for intersecting iva1ls and slabs: Provide founda-
tion for porch and terrace slabs, concrete or masonry steps
and area walls which adjoin foundation walls.
Chimney foundations: Start at level of lowest adjacent
foundation wall footings.
If special or unforeseen soil conditions warrant, the Director
of Building and Zoning may require either reinforcement of wall
or increased thickness.
Dampproofing and waterproofing. For requirements see Section
21-l2l8 (c).
(2)
(3)
(4 )
(5)
(6)
(7)
(8)
(k) Concrete floor slabs on ground: No floor slab to be placed in
water or on a soft wet subgrade. Basements must be pumped dry
at least twenty-four (2L) hours before floor is poured.
(l) Construction:
(11) Fill under slabs with pea gravel or crushed rocks of a
minimum thickness four (L) inches; no loose earth fill
permitted. Additional fill needed may be crushed rock
or sand, well tamped.
- 15 -
('8) ''''ire mesh reinforcing: When required, minimum weight
forty (Lo) pcunds per one hundred (100) square feet.
(C) Bottom of slab: Not lower than top of footing. Pro-
vide at least four (L) inch bearing on footing.
(2) Cement floor finish:
(A) Finish basement slab with steel trowel.
(B) Integral finish on concrete slab.
(3) Slabs on ground used as a base for floors or as a finished
floor in habitable rooms.
(.l'.) Minimum thickness, four (L) inches. !
(B) Provide ~embrane waterproofing directly under slab, at
least thirty (30) pounds felt, lapped four (L) inches.
(C) Provide perimeter insulation. Insulating material shall
be non-capillary, waterproof, and not subject to de-
terioration by termites or fungi.
(4) Basement floor slabs: Hinimum thickness, four (4) inches.
(5) Garage floor slabs. For requirements see Section 2l-l227.
(6) Terrace and porch floor slabs:
(A) Minimum thickness, four (L) inches.
(B) If reinforced, fill may be omitted.
(C) Install metal flashing between slabs and all wood
construction. For requirements see Section 2l-l223 (f).
(7) Slabs on ground used to support interior bearing walls or
partitions: Thicken to at least ten (10) inches for a width
of twenty (20) inches.
(1) Exterior wood stairs. Wood construction shall be at least two
(2) inches above walk or finished grade.
(m) Reinforced concrete floor on precast joist:
(l)
(2)
(3)
Minimum bearing of joists, three (3) inches.
\fhen span exceeds fifteen (l5) feet, shore at mid span until
slab is set.
Structural design based on T-beam action not acceptable when
metal lath or paper-backed mesh is used for slab forms.
Section 21-l2l8:
Masonry work.
(a) ,Gonoral ~
(1) Materials. For requirements see Section 21-1216.
(2) l{ortar:
(A) rlIasonry below grade, use Portland cement mortar; one (1)
part Portland cement, three (3) parts sand by volume.
Lime, not more than twenty-five (25) per cent of the
cement by volume, may be added.
(B) All other masonry:
(i) Portland cement mortar. See (A) above.
(ii) Cement-lime mortar: one (1) part Portland cement,
one (1) part lime putty, six (6) parts sand by
volume.
(iii) Prepared masonry cement mortars: one (1) part
masonry cement, three (3) parts sand by volume;
add no materials other than sand and water.
- l6 -
(c) Retempering of mortar: Permitted up to one and one-
half (l~) hours after mixing. All mortar shall be
used wi thin two (2) hours after mixing.
(3) Joints:
(A) Maximum thickness, five-eighths (5/8) inch. Joints
for decorative stone work may be increased one-fourth
(l/L) inch. All joints to be uniform in thickness.
(B) Solid masonry units: Fill jclnts solid.
(C) Hollow masonry units: No through mortar joints:
(D) Fill all joints sol:l.d both sides of wall.
(4) Bonding:
(A) Walls of solid masonry units. Solid masonry bearing and
non-bearing walls shall be bonded in accordance with one
of the following methods:
(i) Bonding with headers. The facing and backing shall
be bonded with a header course consisting of alter-
nate through header and stretcher every 7th course,
or one (1). through header ~.n every two hundred and
forty (2Lo) square inches, uniformly placed through-
out wall.
(ii) Bonding with metal ties. The facing and backing
shall be bonded with corrosion resistant metal ties
conforming to requirements of Section 2l-l2l8 (f)(L)
for cavity walls. There shall be one (1) metal tie
for not more than each four and one-half (L~)
square feet of wall area. Ties in alternate courses
shall be staggered. The maximum vertical distance
between ties shall not exceed eighteen (18) inches,
and the horizontal distance shall not exceed thirty-
six (36) inches. Walls so bonded shall conform to
the thickness (exclusing cavity), height and mortar
requirements for cavity walls.
(B) Masonry walls of hollow units. lrJhere two (2) or more
hollow units are used to make up the thick:~-,ss of a
wall, bonding shall be in accord with recommendations of
American Standard Building Code Requirements for Masonry.
M.P. No. 211 (7-15-195L), Section 72.
(C) Stone walls:
(i) Ashlar masonry: Ashlar masonry, bond stones uni-
formly distributed shall be provided to the extent
of not less than ten (lO) per cent of exposed faces.
(ii) Rubble stone masonry: Rubble stone masonry twenty-
four (2L) inches or less in thickness shall have
bond stones with a maximum spacing of three (3)
feet vertically and three (3) feet horizontally,
and if the masonry is of greater thickness than
twenty-four (24) inches, shall have one (1) bond
stone for each six (6) square feet of wall sur-
face on both sides.
(D) Intersecting concrete masonry walls shall be bonded to-
gether in an approved manner.
(5) Closed cell hollow units: Use for rough openings, corners, and
wall intersections. Filling exposed ends of cells not acceptable.
- 17 -
(6) Protection: Provide frost protection acceptable to Director
of Building and Zoning when temperature falls below freezing.
No masonry work shall be done in temperatures below twenty
(20) Degrees Fahrenheit. (Protection as outlined by American
Standard Building Code Requirerr.ents for l!asonry, M.P. No. 2ll,
shall be considered acceptable practice.)
(7) Subjecting to loads: Allow sufficient time for strength of
masonry to develop before subjecting to loads.
(b) Mason unit foundation walls (for cast-in-place concrete founda-
tion walls requirements see Section 21-l2l7 (j):
( 6)
(7)
(l)
General:
(A) l!aterials. For requirements see Section 21-l2l6.
(B) Walls supporting Hood frame construction: Extend not
less than six (6) inches above adjoining outside finish
grade i ,
(C) Walls supporting masonry veneered wood frame: Extend
foundation so that wood Dortion of wall is not less than
six (6) inches above out~ide finish grade.
(D) Hollow masonry units shall not be permitted in exterior
foundation walls.
Minimum thickness of masonry foundation walls:
(A) Foundation walls shall be of sufficient strength and
thickness to resist lateral pressures from adjacent
earth and to support their vertical loads. Foundation
walls (or their footings) shall extend below the level
of frost action (42 inches).
(B) Foundation walls shall have a minimum thickness of ten
(10) inches, except as provided in subsection ~C) below.
(C) Foundation walls of solid masonry units, which do not
extend more than five (5) feet below the adjacent
finished ground level and where the combined height
of the foundation walls and walls supported thereon
do not exceed thirty (30) feet, may have a minimum
thickness of eight (8) inches.
Girder pockets: Provide four (4) inch end bearing for girder:
Sill anchor bolts to be installed:
(A) Diameter, one-half (1/2) inch minimum.
(B) Minimum length in masonry unit walls, fifteen (l5)
inches.
(C) Provide washer under nuts on bolts.
(D) Spacing, not more than eight (8) feet on center,
minimum two (2) bolts in each piece.
Foundation for intersecting walls and slabs: Provide foundation
for porch and terrace slabs, concrete or masonry steps and area
walls which adjoin foundation walls.
Chimney foundations: Start at level of lowest adjacent
foundation wall footings.
If special or unforeseen soil conditions warrant, the Director
of Building and Zoning may require either reinforcement of wall
or increased thickness.
(2)
(3)
(L)
(5)
(c) Dampproofing and waterproofing:
(l) Dampproof basement or cellar walls on exterior from finish
grade to outside edge of footing:
- 18 -
(A) Masonry unit walls: Apply one-half (1/2) inch thick
Portland cement plaster coat forming a cove at the
footing, over which apply at least one (l) heavy coat
of undiluted hot tar, asphalt or compound acceptable
to the Director of Building and Zoning.
(B) Concrete walls cast in place: Apply at least one (1)
heavy coat of undiluted hot tar, asphalt or compound
acceptable to the Director of Building and Zoning.
(d) Exterior walls above grade:
( 1)
(2)
0)
Materials: All materials shall meet the requirements of
Section 21-l216.
Allowable heights and thicknesses:
(A) In residence buildings not more than two (2) stories in
height, walls other than coursed or rough or random
rubble stone walls may be of eight (8) inch thickness
when not over thirty (30) feet in height from grade to
ridge at gable ends, and when the roof is designed to
impart no lateral or horizontal thrust such Walls shall
have a minimum thickness of twelve (l2) inches.
Rough or random or coursed rubble stone walls shall ~~
not less than sixteen (16) inches in thickness. .
Hollow walls of masonry units shall not exceed thirty (30)
feet in height from grade to ridgo of gable ends except
that ten(lO) inch cavity walls shall not exceed twenty-
five (25) feet in height above the support of such walls.
The facing and backing shall each have a thickness of at
least a nominal four (L) inches and the cavity shall be
not less than two (2) inches (actual) nor more than three
(3) inches in width. The facing and backing of cavity
walls shall be bonded with metal ties. For requirements
see Ection 21-1218 (a) (L) (A) (ii).
(D) Walls in one (1) story residence buildings, and one (1)
story private garages may b~ of six (6) inch thickness
when not over ten (10) feet in height when solid structural
clay masonry units are used, or nine (9) feet in height
for hollow structural clay masonry units, except that an
allowance of an additional six (6) feat is permitted for
gables.
Maximum height for eight (8) inch thickness: Twenty-two (22)
feet from grade to eaves; or thirty (0) feet from grade to
ridge in gable ends. For greater heights, minimum thickness,
twelve (12) inches except top twenty-two (22) feet.
Backing, when used, solid or hollow masonry units, minimum
thickness:
(A) Bonded to faCing, four (4) inches.
(B) Tied to facing with sheet metal ties, eight (8) inches.
Furring when interior finish is applied: Not less than one (l)
inch wood strips. Spacing as permitted for interior finish.
For requirements see Section 21-1225. Bituminous waterproofing
materials on masonry not acceptable for plaster base. Install
horizontal furring strips at ceiling and fl~or to form fire
stops and prevent convection.
(B)
(C)
(4)
(5)
- 19 -
(6)
Lintels: Size to be determined by span in each case. No
c09centrated loads over non-reinforced lintels.
(A) Lintels may be precast concrete and brick reinforces;
stonei masonry arch; or steel. (For requirements see
(AS'll1.A 7-56T).
(B) Support on four (4) inches of solid masonry.
Rafter plate anchor bolts to be installed:
(A) Diameter, one-half (1/2) inch minimum.
(B) Minimum length in masonry unit walls, fifteen (l5)
inches; poured concrete walls, ten (10) inches.
(C) In masonry walls, washer and three (3) inch square plate
on bolts.
(D) Spacing, not more than eight (8) feet on center.
Radiator recesses:
(A) Construct at time wall is built.
(B) Maximum recess depth, four (4) inches in eight (8) inch
~alls; eight (8) inches in ~elve (12) inch walls.
(C) Back and sides of recess to be waterproofed and
insulated.
(D) Width under windows not greater than rough opening.
Vertical chases:
(A) Construct at time wall is built.
(B) HaximUIl1 . length for chases where net wall thickness is
eight (8) inches or less, four (4) feet.
(C) Haximum chase depth, foul:' (4) inches.
(D) Back and sides of chase to be plastered with one-half
(l/2)inch of Portland cement mortar.
Horizbntal chases:
(A) Not aceeptable unless wall thickness is at least four (4)
inches greater than thickness required under Section
2l-l218 Cd) (2).
(B) Maximum depth, four (4) inches.
(7)
(8)
(9)
(lO)
(e) Masonry veneer:
( 1) i''finimum thickne s s :
(A) Brick, three and three-fourths (3-3/4) inches.
(B) Ashlar stone masonry, four (4) inches.
(C) Rubble-stone masonry, uncoursed, (field stone), twelve
(12) inches; mosaic or random, twelve (12) inches;
coursed, one (1) story, eight (8) inches, over one (1)
story, twelve (12) inches.
(2) Masonry veneered wood frame construction: Veneer applied over
sheathing with air space between.
(A) Air space: three-fourth (3/4) inch between masonry
veneer and sheathing.
(B) Base flashing: Copper extending over top of foundation
wall from outside face of wall and not less than twelve
(l2) inches up on sheathing.
(C) Apply water-resistant building paper or saturated
asphalt felt over sheathing. Lap base flashing at
least four (4) inches.
(D) Bonding: Corrosion-resistant metal ties spaced not
more than fifteen (15) inches vertically and thirty-two
(32) inches on center horizontally. Hhen other than
wood board sheathing is used, secure ties through to
studs with corrosion-resistant nails of length sufficient
to penetrate wood at least one (1) inch.
- 20 -
(E)
Lintels: Size to be determined by materials and span
in each case. Bearing, at least four (4) inches.
Arches permitted.
(f) Cavity walls:
(l) The minimum thickness of the inner and outer wythes of cavity
walls shall not be less than a nominal four (Q) inches, and
the nominal out-to-out dimension of the wall shall not be less
than ten (lO) inches.
(2) The maximum height of ten (1) inch cavity walls and the
width of the cavity shall conform to the requirements of
Section 2l-12l8 (d) (2) (C).
(3) All masonry units shall be laid in a .fUll head and bed mortar
joint. The mortar used in cavity wall construction shall
conform to the requirements of Sub-sections 21-l2l8 (a) (2)
(A) and (B).
(4) The facing and backing of cavity walls shall be bonded with
three-sixteenths (3/16) inch diameter non~corrosive steel
rods 01 metal ties of equivalent stiffness embedded in the
horizo~tal joints. There shall be one (l) metal tie for
not more than oach four and one-half ( Q~) square feet of
wall area. Ties in alternate courses shall be staggered,
the maximum vertical distance between ties shall not exceed
eighteen (18) inches, and the m3ximum horizontal distance
shall not exceed thirty-six (36) inches. Rods or ties bent
to rectangular shape shall be used with hollow masonry units
laid with the cells vertical; in other walls the ends of
ties shall be bent to ninety (90) degree angles to provide
hooks not less than two (2) inches long. Additional bonding
ties shall be provided at all openings, spaced not more than
three (3) feet around the perimeter, and within twelve (12)
inches of all openings.
Non-corrodib1e flashing shall be placed over the top of all
openings, at window sills and at the bottom of the cavity.
Weep holes shall be provided in the exterior wythe along all
flashing. The weep holes shall be spaced not more than
twenty-four (24) inches on centers. Every effort shall be made
to keep the cavity clear of mortar droppings.
Furring. For requirements see Section 21-1218 (d) (5).
(5)
(6)
(7)
(g) Interior masonry walls:
(l)
(2)
(3)
(4 )
~1aterial: Masonry or cast-in-place concrete.
Pipe recesses: Construct at time walls are built.
Party and fire walls:
(A) Minimum thickness. Cast-in-place concrete six (6) inches;
masonry units, eight (8) inches. Chases or recesses not
panni tted.
Flat roofs: Extend above roof, flash and cap with stone,
concrete, vitrified tile, or terra cotta.
Under pitched roofs: Build masonry solid to underside of
roof sheathing unless carried above roof.
Bearing partitions:
(A) Minimum thickness of plain concrete or unit masonry wall
shall be not less than a nominal six (6) inches.
(B) Sections of walls with distance between openings two (2)
feet or less: Solid masonry units or hollow units
filled with concrete.
(B)
(C)
",
(c) Lintels: Steels, reinforced concrete or masonry arches;
minimum; four (4) inch bearing upon solid masonry at
least four (L) inches thick.
(D) Joist bearings: Solid masonry at least four (4) inches
thick.
(E) Girder bearing: Solid masonry at least eight (8) inches
thick.
(5) Non-bearing partitions:
(A) Minimum thickness, three (3) inches.
(B) Lintels: Steel, reinforced eon~rete or masonry, or
masonry arches 4
(h) Chimneys:
(1) ~a~onry chimney; ,
(A) Separate flue required fot' each fireplace~ ,
(B) Separate flue req~ired for each appliance fired with
naturai~taft oil burner. Separate flues required for
all other equipment, depending d~on s~s~~1ned chimney
draft for ,proper operatio~, un1essdamb1ned flue is
specifically appro~ed by the Director of Building and
Zoning.
(2) Materials: Solid masonry; footing concrete cast in place.
(3) Effective flue area: At least as ,rocommended' by the manufacturer
of equipment connected to chimney and at least equal to area of
outlet (smoke or vent) of equipment connected to it, minimum
diameter for house heating flue, eight (8) inches~ For fire-
places, effective area not less than one-tenth (l/lO) of fire-
place opening.
(L ) Chimne y linings, wythe sand walls:
(A) Glazed fire clay flue lir..1ng required in all chimneys
for liquid and solid fuels. IVhen gas is used as fuel,
provide flue lining of metal or composition acceptable
to the Director of Building and Zoning, or glazed fire
c lay lining or vi trifled tile lining, bell and spigot
type, bell end up, with all joints made with acid-
resisting mortar. Provide drain to dispose of condensa-
tion.
(B) Two (2) flues may be grouped without a wythe of masonry
between them provided the joints of the linings are
staggered at least seven (7) inches.
(C) Wythes separating flues or groups of flues with linings
not staggered, three and thre-fourths (3-3/L) inches
minimum thickness.
(D) Walls, minimum thickness, three and three-fourths
(3-3/L) inches in addition to lining.
(5) Height of chimney: As recommended by equipment manufacturer,
and not less than two (2) feet above the ridge of the roof
that the chimney penetrates and not less than two (2) feet
above the highest ridge wi thin fifteen (l5) feet of the
chimney.
(6) Cap obimney to form wash from the flue to outside edge, min-
imum thickness, three (3) inches.
(7) Metal thimbles and cleanout doors to be built in at the time
chimney is constructed.
(8) Prefabricated chimneys, for requirements see Section 21-1230.
- 22 -
(i) fireplaces:
(1)
(2)
(3)
(4 )
(5)
Smoke chamber and damper required in all fireplaces.
Minimum wall thickness, eight (8) inches in addition to the
lining.
Ash dump: i-Jhen proiti.ded,.. empty =_nto concrete or masonry cham-
ber provided with metal c1eanout door.
Lining: Two (2) inch fire brick or other material acceptable
to the Director of Building and Zoning.
Hearth:
(A) Support independently on masonry or concrete.
(B) Projection from chimney breast, at least sixteen (l6)
inches.
(C) Width: At least eight (8) inches wider than fireplace
opening on each side.
(D) Material: Incombustible.
(E) Combined thickness of hearth and support, six (6)
inches.
(6) Fireplace opening lintel: Use brick arch, concrete, stone or steel.
(7) F8cing: Masonry, no combustible material closer than three and
one~half (3~) inches to fireplace opening.
(j) Glass block:
(1) ~1ay not use as load-bearing un:!. ts.
(2) Haximum'size of unsubdivided panel: Area, one hundrad forty-
four (1L4) square feet; length, twenty..five (25) feet; height,
twenty (20) feet.
(3) Provide for expansion.
Sed,Hon 21,,1219: Structural steel and iron.
(a) General:
(1) Structural steel. For requirements see ASn.1 A 7-56T.
(2) Design, fabrication and erection. For requirements see
AISC Manual 1956.
(b) Be~s and girders:
( 1) Connec ti ons :
(A) Design to carry super-imposed loads.
(B) Rivet weld, or bolt.
(2) Bearing: On walls, minimum, four (4) inches.
(3) Bearing plates:
(A) Design to distribute load, minimum thickness, five-sixteenths
(5/l6) inch.
(B) Bed in Portland cement mortar.
(C) Plates may be omitted under wide flange type steel beams if
width of flange provides sufficient bearing area so that
allowable compressive stress of supporting materials is not
exceeded.
(4) Paint beams with two (2) coats of an acceptable metal protect-
ive paint: This is in addition to shop paint. For crawl space
construction, painting shall be completed before installing
floor joists and before foundation inspection. Beam ends shall
be grouted in foundation wall pockets.
( c ) Columns:
(1) Material:
(A) Standard shape, steel or cast iron.
(B) Concrete-filled steel pipe, new material, standard
weight or heavier.
- ?i -
(c) Boiler tubing not acceptable.
(2) Bases and caps: Steel or cast iron.
(A) Caps: Rivet or bolt to steel girders.
(B) Bases: Anchor by bolts or embed in concrete.
(3) shims, metal. Loose shims not acceptable. Maximum of two
and one-fourth (2\) inches.
Section 2l-l220: Wood construction.
(a) Lumber:
(l) Structural stress-graded lumber. Spans for structural stress-
graded and marked lumber shall be determined from National
Lumber Manufacturers Association publications. For require-
ments see NlliA 1962 Edition.
(2) All plywood used structurally shall bear the identification of an
approved testing agency as to type and grade of plywood, species
of veneer, and conformance with the appropriate U. S.Comrnercial
Standard.
(3) Lumber dimensions:
(A) Nominal sizes are given in these requirements unless
noted otherwise.
(B) ~1inimum finish dimensions Width ~nd thickness, as follows:
Nominal Actual
1 3/4
2 l-5/8
3 2-5/8
(b) Framing, general:
(l) Structural framing members:
(A) Splicing between bearing points not permitted.
(B) Any cutting or boring of holes in any structural member for
the allowance or admittance of piping, duct work or other
appurtenances shall be limited to one-fifth (l/5) of the
depth of thickness or width of, such member, providing that
if cutting in excess of the foregoing is required that such
members thus affected shall be properly reinforced, in a
manner acceptable to the Director of Building and Zoning.
(2) Framing at chimneys:
(A) Bearing of framing members on chimney masonry not accept-
able. Piers built integral with chimney may be used for
girder bearing provided end of girder is at le~st two (2)
inches away from chimney masonry.
(B) Framing members: Not closer than two (2) inches to chimney
masonry. Space may be one-half (1/2) inch if asbestos board
one-fourth (l/L) inch thick and same width as framing mem-
bers is used between masonry and framing.
(3) Firestopping:
(A) Firestop all furrning, partitions and outside stud walls at
level of each floor or ceiling, C1.nd at juncture of roof
rafters and wall.
(B) Wood or masonry tightly fitted, or other methods acceptable
to the Director of Building and Zoning, shall be used.
(DIMENSIONS IN INCHES)
Nominal Actual
L 3-518
5 L-5/8
6 5-5/8
Nominal
8
IJ.
12
Ac tual
7-1/2
9-1/2
1l-1/2
(c) Floor framing:
(l)
(2)
(3)
Columns and posts:
(A) Structural steel or iron. See Section 21-l219.
Girders:
(A) Material Structural steel or reinforced concrete.
Sills: Level and grout with Portland cement mortar. Wood shingles,
chips, or similar material are not acceptable for permanent shims.
~,
(4) Joists:
(A) Maximum spans for wood are as follows:
MAXIMUM ALLCNlABLE SPANS FOR FLOOR JOISTS
Of other than structural stress-graded and marked lumber
Spacing
Center Maximum Allowable Spans
Lumber Size to Assumed live load
Nominal Ac tual Center 40 Ibs. per sq. ft.
Inc hes Inches Inches Feet Inches
2 x 8 l-5/8 x 7-1/2 16 11 6
12 13 2
2 x 10 1...,/8 x 9-1/2 l6 14 6
12 l6 7
2 x l2 1-5/8 x 11-l/2 l6 17 5
l2 19 11
3 x 8 2..5/8 x 7-1/2 16 1L 5
l2 l6 4
3 x 10 2...5/8 x 9-1/2 l6 18 1
12 20 6
3 x 12 2-5/8 x ll-1/2 l6 21 9
12 24 6
(B) Framing into headers or side of wood girders: Use steel
joint hangers, metal framing anchors or wood bearing
strip at least two (2) by three (3) inches. Notching of
joist more than one-fourth (lIL) of depth not permitted.
(C) Framing into side of steel girders: Allow one-half (1/2)
inch clearance over top of top flange. Secure to girder
or to opposite joists, or bridge joist firmly at girder
ends if other ends are fixed. Notch for gearing not
more than one-fourth (1/4) of joist depth.
(D) Framing into masonry:
(i) ~1inimum bearing three (3) inches.
(ii) Fire cut or bevel, two (2) inches.
(iii) Second-story floor joists parallel with masonry:
Tie to masonry with metal straps extending over
and secured to at least one (l) joist and not
more than eight (8) feet on center.
(E) Butt or lap joists over girders and bearing partitions:
(i) Butting: Center and tie with metal straps or one
(1) inch thick wood ties at least two (2) feet long.
(ii) Lapping: At least four (L) inches; spike together;
maximum projection beyond bearing,. One (1) foot.
(F) Double joists:
(i) Under all bearing partitions and under plaster
finished non-bearing partitions when parallel to
floor joists.
(ii) 111]here piping or duct work occurs block joists apart
four (4) foot intervals.
(iii) Under heading partitions, more than two (2) joists
may be required by the Director of Building and
Zoning, depending upon loading c ondi tions.
(iv) Support of furnace unit: Double the floor joists
framing each side of floor opening for plenum of
furnace; spike joists together.
- 25 -
(v) Support of hot water heater, washing machine or
special loading conditions: D0uble the floor
joists supporting unit, especially where the
equipment is aligned on both sides of a partition
wall.
(G) Headers and trimmers:
(i) Headers four (4) feet or less in length may be
single; headers receiving three (3) or more tail
beams~ support in steel hangers, or on ledger
boards not less than two (2) by three (3) inches.
If header is over seven (7) feet in length,
secure ledger to trimmer with lag screws.
(ii) For openings at end of joist span with headers
four (L) feet or less, trimmers may be single.
(iii) Use double framing under all other conditions.
(iv) Header ten (10) feet and over supporting second-
floor exterior wall to be steel beam or steel
columns or other method approved by the Director
of Building and Zoning.
(H) Cutting of floor joists:
(i) Notching top or bottom for piping and duct 1oJork
is permitted to not more than one-fifth (l/5)
minimum required joist depth except there shall
be no notching in middle third of span; otherwise
install header.
(ii) Holes may be bored through joists, maximum dia-
meter two and one-half (~~) inches; edges not
nearer than two (2) inches to top and bottom of
joists.
(I) Cross-bridging:
(i) l~aximum spacing, eight (8) feet; minimum size, one
(i) by three (3) inches double nailed at each end;
bridging split in nailing not acceptable.
(ii) Rigid metal bridging may be used when acceptable
to the Director of Building and Zoning.
(J) Cantilevered construction: Submit detail drawing.
(5) Subflooring:
(A) Wood boards:
(i) Thickness, one (1) inch; maximum width, eight (8)
inches, unless triple-nailed. J1aximum joist spacing,
sixteen (16) inches on center.
(ii) No two adjoining boards to break joints over same
joist space; each board to bear on at least two (2)
joists.
(iii) Other spacings may be used when subflooring is
designed according to loads to be imposed.
(B) Plywood, bonded with water-resistant glue:
(i) Minimum thickness, for indicated joist spacing:
l/2 inch (5 ply) 16 inches, o.c.
3/L inch (5 ply) 2L inches, o.c.
l-1/8 inch (7 ply) 48 inches, o.c.
- 26 -
(ii) Minimum recommended width of girders, supporting
floor loads for one and one-eighth (l-1/8) inch
plywood at forty-eight (U8) inches o.c. if four (U)
inches. Recommended sizes and spans for girders are:
L x 6 8"0"
L x 8 - 11'0"
L x 10 ..:I.L '0"
U x 12 ... 17 '0 II
(Ui) Under non"'structural finish flooring when used as
a base for parquet wbod finish flooring less than
25/32 inches thick, linoleum, composition, rubber
or. ceramic tile, install sQlid blocking under all
edges at right angles to floor joists.
(iv) Nailing: Nail securely to joists and blodking with
nails six (6) incheso.c. on edges and ten (10)
inches o.c. in inte~ediate fram~ng mefubers.
(v) As underlay, when used for leveling purpo~es over
other subflooring; minimum thickness one~tourth
(lIL) ineh, 3 ply. For requirements see Section
21-1226 (d) (2).
(C) Clearance: Provide one-half (l/2) inch clea:t'ance between
all sub flooring and all masonry walls, chimneys and
partitions.
(D) For requirements for floors finished with any material
other than hardwood sec Section 21-l226 (d) (2).
(d) Ceiling framing. For requirements see Section 21-1212.
(1) Joists:
(A) I'1aximum spans for ceiling or attic floor joists are as
follows:
(i) For no attic storage, maximum access opening is six
hundred (600) square inches.
(ii) \vith larger access opening, design for limited
attic storage.
(iii) 1rJ'ith permanent or disappearing stair, design
according to floor joist table in Section 21-1220
(c) (U) (A).
(iv)
Ml"!nMm'1 ALLCWABLE SPANS FOR CEILING OR ATTIC
FLOOR JOISTS
Of other than structural stress-graded and marked lumber
Lumber Size
Nominal
Inches
2 x 6
Spacing
Center
to
Center
Inches
16
12
16
12
l6
12
2 x 8
Actual
Inches
1-5/8 x 5-5/8
1-5/8 x 7-1/2
1-5/8 x 9-l/2
2 x 10
- 27 -
INO attic
storage
IAssumed live
Iload - none
Ft. Inches
4 0
15 11
18 L
20 lO
. ited attic
storage
Assumed live load
20 lbs. per sq. ft.
Ft. Inches
II L
13 1
15 2
17 6
19 3
22 1
(B) Use ceiling joists as ties for rafters wherever possible.
(C) Bridging: Solid, two (2) inches thick full depth of
joists, staggered for end nailing. Joists eight (8)
inches and over, 1" x 3lJ cross bridging or rigid metal
bridging may be used; when acceptable to Director of
Building and Zoning maximum spacing, eight (8) feet
on center.
(D) Framing of ceiling joists oever girders and bearing
partitions: As required for floor joists. For require-
ments see Section 21-l220 (c) (L) (E).
(2) Hung ceilings, flat roof construction: l1inimum size 2" x 4"
on edge separated by wood or metal hangers, not more than ten
(10) feet on centers.
(e) Roof framing.
( l) General.
(A) Headers and trimmers~
(i) Headers four (L) feet or less in length may be
single.
(ii) When chimney is at ridge or eaves and header is
four (4) feet or less, trimmers may be single; use
double framing under all other conditions.
(iii) Dormer windows not to be supported on partitions:
Double headers and rafters required.
(B) Anchor wall plates or rafters and roof joists on masonry
wall.
(2) Pitched roofs:
(A) Minimum pitch. For requirements see Section 2l-l222 (n) (1).
(B) Maximum rafter spans are as follows:
MAID1UM ALLOt] ABLE SPANS OF RliFTERS
AND FLAT ROOF JOISTS
Of other than structural stress-graded and marked lumber between
plate and ridge or intermediate support for wood or
asphalt shingles or built-up roofing
(Collar beams designed as compression members
may be acceptable as intermediate supports)
~,1aximum Allowable Spans (Clear)
For Roof Slopes
3 in 12 or less
measured horizontally
Greater than 3 in
Spacing measured on slope
Conter roofing material
to Weight 5 lbs. per
Center sq. ft. or loss
Inches _ F~- Inches
l2
INot support-
'Svpporting ~ng
finished, inished
ceiling ei1ing
~Ft-. ' tncnes ~-- .-tiiches.
Lumber Size
Nominal
Inches
fic tual
Inches
2 x 6 l-5/8 x 5-5/8 l6 1L 3 10 6 l2 6
12 16 5 12 1 14 4
2 x 8 1-5/8 x 7-l/2 16 19 0 14 0 16 7
l2 22 0 l6 2 19 2
2 x 10 1-5/8 x 9-1/2 16 2L 1 17 9 21 0
12 27 10 20 6 2L 2
- 28 -
(C) Rafters: Cut for level bearing and spike to wall
plate; no portion of cut end of rafters to project
beyond inside edge of wall plate; frame rafters
opposite at ridge; provide tie for rafte~s to
prevent thrust and uplift.
(D) Collar beams:
(i) Minimum si ze l" x 6 1I or 2" x 4 II maximum spacing
four (4) feet on center.
(ii) When ceiling joists do not serve as tie at plate
line or are not below lower third of rafters,
:i.nstall ceilings joists (c ollar beams) seme size
as rafters on each pair of rafters, and make
special provisions for tying the lower end of
rafters to the floor or wall construction.
(E) Ridge boards: Use two (2) inch member with depth not
less than cut end of rafter.
(F) Valley rafters:
(i) ~linimum thickness.9 two (2) inches: Minimum depth,
not less than cut end of jack rafters.
(ii) Maximum unsupported length of single valley raft.ers,
eight (8) feet; double rafters, twelve (12) feet.
(iii) 1.1ay be omitted when jack rafters of one roof frame
on sole plate on top of roof sheathing of adjoining
roof.
(G) Crickets or chimney saddles at upper side of all chimneys
not in contact with ridge.
(3) Flat roofs:
(A) Roof joist spans. For requirements see Section 2l-l220
(E) (2) (b).
(B) Cross-bridging: Hinimum size, 1" x 3"; maximum spacing,
eight (8) feet on center.
(C) Joists supporting hung ceilings. For requirements see
Section 21-1220 (D) (2).
(D) Framing of roof joists over girders and bearing parti-
tions: As required for floor joists. For requirements
see Section 21-1220 (c) (U) (E).
(4) Trussed rafters: Trussed rafters may be used in construction
of roofs for residence and buildings of similar size and
design, when designed according to generally accepted good
engineering practices. Detailed drawings signed by a
structural engineer or architect shall be submitted for
approval to the Director of Building and Zoning and shall be
kept on file in the Department of Buildings.
(f) Exterior wall and bearing partition framing.
(1)
Studs:
(1\) Continuous lengths without splicing.
(B) 11inimum size 2" x 4 ".
(c) Maximum spacing for all construction, sixteen (16)
inches on centers; one-story detached accessory buildings,
twenty-four (24) inches.
(D) Maximum length for balloon frame, twenty (20) feet,;
notch studs at second floor to receive 1" x 4" ribbon.
Nail joists to stues.
Corner posts: Not less than three 211 x 4 "s set to receive
interior finish.
(2)
- 29 -
(3)
Corner Bracing:
(A) Braces at external corner: l' xL' let into outside~
face of studs and plates, set approximately at forty-
five (u5) degrees, extended from sill to plate.
Attaching ends of braces to blocks nailed to studs or
plates not acceptable. May be omitted only when wood
sheathing boards are laid diagonally or when fiber-
board, minimum 25/32" xL' x 8 I, is applied vertic ally.
(B) Openings near corner: Use l" xL" knee braces, extending
from corner post to sill and to top plate. Extend over
at not less than three (3) stud spaces.
(C) Openings at corner: Brace as in (A); set as near opening
as possible.
Sill construction:
(A) Sill anchorage. For requirements see Section 21-l2l7
(j) (L) and Section 21-l2l8 (b) (U).
(B) Sills on top of foundation walls; level and grout with
Portland cement mortar; wood not to be used for per-
manent shims.
(C) Other methods may be used if detailed on drawings
submitted with permit application and acceptable to
Director of Building and Zoning.
Window and door openings:
(A) Inner stud on jambs: Extend in one piece from header
to bearing and nail to outer stud.
(B) Headers for usual loading conditions:
(U)
(5)
Size
Maximum Span
Two 2 x Ls on edge ............ 3 '6"
Two 2 x 6s on edge ............ U '6"
TWo 2 x 8s on edge ............ 6'0"
TWo 2 x lOs on edge ........... 7 '6"
(C) Where headers support concentrated loads or are sub-
jected to other unusual loading conditions, the header
shall be specially designed.
(D) If desired, truss construction may be used. When
designed according to generally acc~pted good engineer-
ing practices, detailed drawings signed by a structural
engineer or architect shall be submitted for approval
to the Director of Building and Zoning and shall be
kept on file in the Department of Buildings.
(6) Plates:
(A) Top plates, two 2 x us. Lap at corners and intersecting
partitions. Single 2 x U acceptable for bearing
partitions when studs occur directly under joists or
rafters. \.~hen plates are cut for piping or duct work,
install steel angles on each side of plate not less
than l!:z" x l~" x 1/8", to serve as plate ties and
bearing for joists. Spike angles to joists and plates,
using not less than three (3) nails at each end.
Alternate method for reinforcing cut plates: solid
full depth two (2) inch header and metal tie 1/2" x l2"
gauge with three (3) heavy nails or screws at each end.
(B) lfhere headers support concentrated loads or are sub-
jected to other unusual loading conditions, header
shall be specially designed.
- 30 -
(7)
(8)
(9)
(c) Sole plates, m1n1mum thickness, two (2) i~ches;
exterior wall studs may bear on the sill or on a sole
plate on top of subfloor.
End studs of bearing partitions connection to masonry walls.
Anchor with bolts or spikes.
Wood bearing partitions in cellars or basements are not
acceptable.
Studs to be continuous (balloon frame) when exterior is to
have continuous stucco finish.
(g) Non-bearing partition framing.
(1) Studs:
(A) Use continuous lengths without splicing.
(B) Partitions exceeding six (6) feet of unsupported length
containing openings: size and spacing same as bearing
parti tions .
(C) Pa~titions less than six (6) feet unsupported length
with openings:
Minimum Size
2 x ~s (2" thickness)
2 x hs (hI! thickness)
Maximum Spacing
16" on center
16" on center
(D) Partitions six (6) feet or over in length without openings.
Minimum Size
2 x ~s (2" thickness)
2 x hs (h" thickness)
Maximum Spacing
16" on center
16" on center
(2) Openings:
(A) In two (2) inch thick partitions: Inner stud on jambs,
size 2" x 2" extend in one piece from header to bearing
and nail to outer stud; or single frame with 2" x 6"
jambs continuous from top plate to sole plate with
header notched two (2) inches into each jamb.
(B) In three (3) inch and four (U) inch thick partitions:
Single framing permitted provided opening does not
exceed three ()) feet in width and header is secured
by spiking through jamb studs.
(C) Headers.
Opening width, three (3) feet or less:
2" thick partition, 2" x h" on edge.
U" thick partition, 2" x ~" flat.
Opening width, over three (3) feet:
2" thick partition, 2" x h" on edge.
h" thick partition, two 2 x hs.
(3)
(U)
(5)
Top and sole plates: Minimum thickness, two (2) inches; lap
top plate at outside walls and at bearing partitions.
Wardrobes, cabinets or casework acceptable as non-bearing
parti tion.
Solid plaster partition~:
(A) Maximum unsupported length sixteen (16) feet.
- 31 -
Core: three-eighths (3/8) or one-half (1/2>' inch _
gypsum lath continuous from floor to ceiling and full
width of door frames. Set in grooves of wOQd sill and
plate members and of jambs and heads of900r frames.
Grooved member not required at intersection of v,:alls to
be plastered. At masonry wall intersections, tie or
lace cornerite through lath core with wire" Abutting
units may be fastened as re~ammended by manufacturer
and as approved by the Director of Building and Zoning.
Sill and plate members: Finished thickness, one and
one-fourth (l~") inches minimum. Securely nail to
floor and s truc tural framing, .'. ' ,
Door frames: Mill built as finished frame. Thickness,
one and five-eighths (1-5/8) inches minimum. Prime
coat all sides. Secure to floor framing.
Coat core both sides with gypsum p1ast~r by driving
8d nails on each side of lath, three-eighths (3/8)
inch out from groove, at thirty (30) degree angle with
plane of lath, on twelve (12) inch oenters staggered,
then bend baok against lath.
Pipes and conduits: Plumbing pipes, not permitted.
Hoisture resistimt electrical conduit, tie securely to
face of lath. Use shallow outlet box.
Coat core both sides with gypsum plaster to overall
thickness of two (2) inches, three (3) coat or two (2)
coat double-up work.
(h) Wall sheathing. Sheathing may be omitted on detached aCdessory
buildings not containing habitable rooms.
(l)
(B)
(c)
(D)
(E)
(F)
(G)
Wood boards:
(A) May be used under any exterior finish material.
(B) Minimum thickness, one (l) inch (25/32 inch actual);
maximum width, eight (8) inches unless triple nailed;
maximum stud spacing, twenty-rout' (2L) :i.rtdhes on oenter.
(C) Break joints over center of studs unless end-matched
(T & G) boards are used; no two adjoining end-matched
boards to break joints over same stud space and each
board to bear on at least two studs.
(D) Application: When laid diagonally, extend at forty-five
(45) degrees in opposite directions from each corner;
apply horizontally under stucco finish.
Plywood, Exterior Grade:
(A) May be used under any exterior finish material.
(B) liinimum thickness, three-eights 0/8) inch; maximum stud
spacing, sixteen (16) inches.
(C) Types of finish which affect the minimum thickness of
plywood used:
(i) Under wood ebi'Qsles: If one-half (l/2) inch
plywood is used, apply shingles over one (l) by
two (2) inch nailing strips using copper or
galvanized nails for attaching shingles. Nailing
strips may be omitted if annular ringed nails
are used for attaching the shingles.
(ii) Under asbestos-cement shingles and siding: If
fi ve-sixteenths (5/16) inch thick plywood is used,
apply siding or shingle material wi th annular
ringed nails. Do,~ot apply over wood nailing strips.
(2)
- 32 -
(iii) Fiber board: structural. (:For requirements
see FS-LLL-F~32lb.
(a) Under wood shingle siding: Apply one (l) by
two (2) inch nailing strips over sheathing,
spaced according to shingle spacing. lifood
shingles may also be applied over fiberboard
shingle backer and fiberboard sheathing with
annular grooved nails at least two (2) inches
in length.
(b) Asbestos-cement siding or asbestos-cement
shingles shall be attached with special metal
fastening devices.
(c) f1inimum thickness
1/2 inch
3/4 inch
Maximum stud spacing
16 inches
24 inches
(iv) Gypsum sheating board: See ASTM C 79-54.'
(a) Asbestos-cement siding or asbestos-cement
shingles shall be attached with special metal
fastening devices.
(b) !1inimum thickness, one-half (l/2) inch;
maximum stud spacing, sixteen (l6) inches.
(c) Under wood shingle siding: Apply 1 II x 2"
nailing strips over sheathing, spaced
according to shingle exposure.
(i) Sheathing paper:
(1) Material:
(A) Water-resistant building paper.
(B) Asphalt saturated felt.
(C) Vapor resistance shall be less than that of vapor
barrier provided on inside of ~all.
(2) Application:
(A) Use over all types of sheathing except as noted in
Section 2l-l220 (i) (3).
(B) Apply shingle fashion, four (4) inch lap. Lap four
(L) inches over paper strips around openings.
(C) Use six (6) inch wide strips behind trim of all exterior
openings.
(3) Paper not required over gypsum or fiberboard, factory treated
to be moisture resistant (except when used behind masonry
veneer and stucco), provided:
(A) Necessary corner and opening cuts are caulked with
elastic waterproof caulking material. Corner joints
may be protected with eighteen (18) inch widths of
~heathing paper applied shingle fashion.
(B) At heads of openings, bottom edge of board is located
to permit head flashing to be extended under and
turned up behind sheathing, and joint between head
flashing and board is caulked.
( 5 ) Roof she a thing:
(1) Wood boards:
(A) May be used under any roofing material.
(B) Minimum thickness, om (1) inch OIL inch actual),
maximum width, eight (8) inches; maximum rafter spacing,
sixteen (l6) inches on center required for T & G sheathing.
- 33 -
(c) Break joints over center of rafters unless end-
matched (tongue and groove) boards are used; no
two adjoining end-matched boards to break joints
over same rafter space and each board to bear on
at least two rafters.
(D) Application: Lay closed under all roof material
except wood shingles. Under wood shingles, use one (1)
by four (~) inch shingle lath spaced according to
shingles' exposure.
(2) PlywoodJ Exterior Grade:
(A) May be used under any roofing material.
(B) ~-1inimum thickness:
(c) Under wood shingles; apply Iii x
plywood less than three-eighths
according to shingle exposure.
(D) Protect exposed edges of sheathing along eaves and rake
of roof with mouldings or sheet-metal flashing. Flashing
along eaves may be integral with gutters. If gutters
are not installed, form the flashing to provide a drip.
Fiber board acceptable for roof sheathing, two (2) inch
minimum thickness.
Roofing
~1ateria1
Wood and asphalt shingles
Rafter
Maximum
Spacing
(inches)
16
2~
Slate, tile & asbestos cement
shingles ....... 0 Cl . 0 . . 0 . . . . . . . .
Flat Roofs
16
24
16
24
2" nai ling
(/8) inch
...................0..
0)
Plywood
Minimum
Thickness
(inches)
1/2
1/2
l/2
5/8
1/2
5/8
strips over
thickJ spaced
(k) Stair stringers. For requirements also see Section 2l-1209.
(l) Provide solid bearing on top and bottom.
(2) Effective depth of wooden stringers, minimum, three and
one-half (3~) inches.
(3) Open basement stairs: Minimum stringer thickness, two (2)
inches.
(4) Third stri~ger: Install if treads are less than one and
one-eighth (l-1/8) inches thick and stair is more than
two (2) feet six (6) inches wide.
(l) Caulking.
(1) Caulk around exterior openings in masonry or masonry veneer
walls.
(2) Caulk at intersections of wood and masonry except when
flashed. This does not apply to tops of foundations.
(3) Caulking shall remain elastic non-hardening and firmly
adherent.
Section 21-l22l: Exterior wall finish. (For requirements see
Section 21-l220 (h).)
(a) 1'11ood siding.
(l) Use well seasoned material.
(2) Nail at each bearing with hot-dipped galvanized or
aluminum nails.
_ ~ll _
(3) Bevel siding:
(A) Finish dimensions to comply with the following limitations
as to minimum top and butt thickness:
Nominal \lJidth
(inches)
U, 6 and 8
lO and l2
Thickness at
Top (inches)
3/16
3/16
Thickness at
Butt (inches)
7/16
9/l6
(B) ~1inimum head1ap: One (1) inch for four (U) inch width;
one and one-fourth (l\) inches for widths over four (L)
inches.
(C) Nail near butt only. Do not nail through board underneath.
Rustic and drop siding: ~1inimum thickness, three-fourths (3/L)
inch (finished); maximum width, eight (B) inches (nominal).
Shiplap or matched siding:
(A) Minimum thickness, 25/32 inch (finished); maximum width,
twelve (l2) inches (nominal).
(B) Triple nail all boards over eight (B) inches in width.
(C) When boards are applied vertically, set edges in white
le ad.
(U)
(5)
(b) Wood shingle siding.
(1) Shingle grades.
(A) Single ~ourse siding, No. 1 or No.2.
(B) Double course siding, No. 1 for exposed shingles; under
course may be Mo. 1 or No.2.
(2) Minimum size:
Length l~ inc he s )
lB
2U
Thickness
5 butts :in 2 inches
5 butts in ~~ inches
q butts in 2 inches
(3) Maximum exposure:
Shingle Length
(inches)
l6
IB
2L
Single Course
Exposure (inches)
7~
B42
11
Double Course
Exposure (inches)
l2
14
16
(L) Nailing:
(A) Nails: Non-corrodible.
(B) Butt nail double coursing: Exposed nails may be small
he aded .
(c) Asbestos-cement siding and shingles. For requirements see
Section 2l-l220 (h) (3) (B).
(l) Material. For requirements see FS-SS-S-29lc.
(2) Apply clapboards and shingles in accordance with manufacturer's
recommendations.
(3) Nails, non-corrodible.
(d) Plywood.
(1) Approved grade mark for exterior use, on each sheet of plywood.
(2)' Plywood, three-eighths (3/B) inch thick, may be used on
'sheathed walls.
- 35 -
(3) Installation:
(Il) Protect edges prior to erection with paint, mixed 100
pounds white lead paste, one and three-fourths (1-31L)
gallons raw linseed oil and one (1) pint dryer, applied
without thinning.
(B) Vertical joints: To occur over studs.
(C) Horizontal joints: Install solid blocking between
studding for nailing.
(D) Butt joints of square-edge material, whether exposed
or covered by battens, fill with mastic.
(E) Corner boards: Apply over plywood or butt plywood
against boards at all corners.
(F) Nails: Cement-coated or hot-dipped galvanized, flat
head. Minimum spacing, on edge, six (6) inches; on
center, at intermediate bearings, twelve (12) inches
on center.
(e) stucco. For requirements see Section 2l-1220 (f) (9) and
Section 21-l220 (h) (1) (D).
(1) Lath for stucco. For requirements see FS-QQ-B-101c. Wood
lath not acceptable.
(A) Expanded metal lath, painted; with large openings,
1.8 pounds per square yard.
(B) Nails: Electrolytic zinc-coated furring nails.
(C) Metal lath, held at least one-fourth (l/L) inch away
from sheathing by furring nails. Furring strips and
self-furring lath not permitted.
(2) Stucco:
(A) F1Iaterials. For requirements see Section 21-l2l6.
(B) Mixture: One (l) part Portland cement, three (3) parts
sand, and hydrated lime equal to ten (10) per cent of
cement by volume; or prepared Portland cement stucco
used in accordance with mclDufacturer' s roc;)r.rrnoncations.
(C) Thickness: Three (3) coat work, one (1) inch total;
two (2) coat work, five-eighths (5/8) inch total.
(D) Application:
(i) Three (3) coat work, over wood frame.
(ii) TWo (2) coat work, over masonry surfaces.
(iii) Finish coat may be trowel coat of prepared
exterior Portland cement stucco.
(iv) Thoroughly cover and embed lath in stucco.
(v) Keep wet two (2) days after application of each coat.
(vi) Drying time before application of finished coat,
seven (7) days.
(viii) Stucco not to be applied when temperature is
lower than forty (UO) degrees F.
(f) Hardboard.
(1) Material.
(2) Grade: Tempered, exterior shall be of a type specially manu-
factured for siding purposes.
(3) Hardboard one-fourth (IlL) inch or five-sixteenths (5/l6)inch
in thickness may be used over sheathed walls.
(L) Application: Hardboard siding shall be applied in accordance
with the manufacturer B recommendations provided they are not
in conflict with these regulations.
- 36 -
Section 2l-l222:
( a ) General.
(1) Roof slope:
(A) Shingle and tile roof, five (5) in twelve (l2) minimum.
(B) Shingle roof less than fivo (5) in twelve (12) but not
less than two (2) in twelvQ (l2) shall be applied in
strict accordance with manufacturer's specifications.
(C) Built-up roofs (gravel or slag surface), two (2) in
twelve (l2) maximum.
(D) Built-up roofs with mineral surface cap sheet, three
(3) in twelve (12) maximum.
(E) When materials and method of applica~ion provide pre-
cautions in excess of these four minimum requirements
to assure a weather-tight roof, above roof slopes may
be reduced subject to acceptance of the Director of
Building and Zoning. Application and materials as
outlined by 'Manufacturer's Selection and Application of
Asphalt Roofing and Siding Products" published by
A.R.I.B., shall be considered as acceptable good practice.
(2) Double starting row, on all shingle applications.
(3) Nails for attaching roof covering, copper or hot-dipped
galvanized nails. StDples not permitted.
Roof coverings:
(b) Asphalt shingles.
(1) Fire Underwriters' C1~ss C label on each bundle.
(2) Approximate shipping weights per square:
(A) Square butt strip, 235 pounds.
(B) Hexagonal strip, 165 pounds.
(C) Individual shingles, 250 pounds.
(3) Exposure as required for Fire Underwriters' Class C label.
(U) Head1ap as recommended' by manufacturers; minimum two (2) inches.
(5) Double thickness at all points. Cut-outs and vertical spacing
three-fourths (3/L) inch or less may be disregarded.
(6) Underlay: Asphalt-saturated felt: itleight approximately
fifteen (15) ponnds per lOO square feet.
(c) l,vood shingles.
(1) Edge-grain, tapered shingles (No.1 grade).
(2) Minimum size:
Length (inc he s )
l6
l8
2L
(3) Maximum exposure:
Thickness
5 butts in 2 inches
5 butts in 2~ inches
L butts in 2 inches
Slope of Roof
Rise Run
3 to 7 l2
7 to 18 l2
(U) Underlay not permitted.
Exposure for Shingle
Length (inches)
l6 l8
L L~
5 5~
2L
6
7~
(d) Asbestos-cement shingles.
(1) Quality: Dense, hard structure and thoroughly seasoned. For
requirement see FS-SS-S-29lc.
- 37 -
(2)
(3)
(L)
Fire Underwriters' Class A or B label on each bundle.
Underlay: One layer asphalt-saturated felt, approximately
thirty (30) pounds per 100 square feet.
American method:
(1\) standard shingle: Minimum weight per 100 square feet,
four hundred seventy (U70) pounds.
(B) strip shingles: l~inimum weight per 100 square feet, two
hundred eighty-five (285) pounds.
(5) Dutch method:
(A) ~'Iinimum weight per 100 square feet, two hundred sixty-
five (265) pounds.
(B) Hinimum headlap, three (3) inches.
(C) Hinimum sidelap, four (L) inches.
(6) French or hexagonal method:
(A) Minimum weight per 100 square feet, two hundred fifty
(250) pounds.
(B) l1inimum overlap two edges three 0) inches.
(e) Tile roofing.
(1) Quality: Hard -burned roofing ti Ie.
(2) Underlay: One layer asphalt saturated felt approximately
thirty (30) pounds per 100 square feet.
(3) Shingle tile, American method:
Length of Shingle
(inches)
16
15
12
Maximum Exposure
(inches)
7
6~
5
(U) Interlocking tile and curved tile: Lay in accordance with
manufacturer's recommendations.
Length of Shingle
(inches)
16
15
14
12
Maximum Exposure
(inches)
7
6~
6
5
(f) Slate shingles:
(1) Quality: Free frail knots or knurls and of reasonably smooth
cleavage. For requirements see Fs-ss-s-L51.
(2) Underlay: Asphalt saturated felt approximately thirty (30)
pounds per 100 square feet.
(3) Laid Americ an method:
(1\) Minimum thickness, three-sixteenths (3/l6) inch.
(B)
Length of Shingle
(inches)
It3
16
lL
l2
10
Maximum Exposure
(inches)
7~
6~
5~
U~
3~
- 38 ..
(g) Built-up roofs.
(1) Asphalt or tar and gravel coverings, including flashings:
Comply with requirements of Underwriters' La boratorie s, inc.
Built-up roof coverings, minimum. 3-ply.
(2) Apply according to manufacturer's directions.
(3) Each ply of felt: Minimum weight, fifteen (l5) pounds per
100 square feet.
(U) Surface with:
(A) Roofing gravel or crushed stone: Approximately four
hundred (LOO) pounds per lOO square feet; or
(B) Crushed slag: Approximately three hundred (300) pounds
per lOO square feet.
(C) Other material approved as to quality and weight by
Director of Building and Zoning.
(5) Top ply of felt and crushed stone or slag surfacing may be
replaced with one layer of mineral surfaced cap sheet, minimum.
weight, eighty-five (85) pounds per 100 square feet.
(h) Metal roofs.
(1) Materials.
(A) Galvanized sheet metal; 26-gauge sheets, 1.25 ounce
(tot~l weight both sides) zinc coating per square foot.
(B) Copper: Sixteen (16) ounce soft (roofing temper).
(C) Rooting tin: Forty (UO) pound coating.
(n) Lead: Sheet lead, two and one-half (~) pounds per
square foot.
(2) Nails:
(1\) Hard copper or copper alloy, for copper roofs.
(B) Hot-dipped galvanized, for galvanized, sheet metal roofs.
Seams, flat or standing; flat seams, locked and soldered.
Provide for expansion.
(3)
(U)
(i)
Other types of roof coverings. Roof coverings such as metal
shingles, canvas or roll rOJfing, may be used when the type and
weight of material, and method of application, are acceptable
to the Director of Building and Zoning.
Section 21-1223: Flashing. Flashings, a lap joint or a turned up
flange, usually of metal to make a water-tight connection between
two (2) different materials.
(a) Material.
(l) Copper: Sixteen (16) ounce soft (roofing temper).
(2 ) Galvanized sheet metal: Twenty-six (26) gauge, 1. 25 ounce
(total weight both sides) zinc coating per square foot.
(3) Lead: Hard lead, two (2) pounds; soft lead, four (U) pounds.
(U) Tin: Forty (UO) pound coating, painted both sides.
(5) Membrane waterproofing material acceptable to the Director
of Building and Zoning.
(6) Copp~r. and zinc flashings, gutters and downspout not to be
used in conjunction with each other.
(7) Aluminum of suitable weight acceptable to Director of
Building and Zoning.
(b) Openings not protected '\;)y overhang.
- 39 -
(l) Heads of openings, wood frame walls:
(1\) Sheet metal extended behind finish siding material and
turned down over outside edge of head trim unless drip
cap extends behind and above bottom of finished material;
or
(B) Three (3) ounce copper-coated building paper may be
used provided flashing is not exposed to weather more
than two (2) inches. Extend behind siding. Blind tack
at outside edge of drip can one (1) inch on center.
(2) Heads and sills of openings, masonry-veneered wood frame walls.
(1\) Haterial: Sheet metal or membrane waterproofing material
acceptable to Director of Building and Zoning.
(B) Head flashing: Extend from front edge of lintel, UP and
over top of lintel and up on shenthing unc~r 1;t:ilditl[
paper.
(e) Sill flashing: Extend under masonry sill, up on sheath-
ing and under wood sill.
(3) Heads and sills of openings, masonry walls.
(1\) Material: Sheet metal or membrane waterproofing material
acceptable to Director of Building and Zoning.
(B) Head flashing: Extend from front edge of lintel, up and
over top of lintel, through wall and turn up one (l)
inch on inside surface.
(C) Sill flashing: Extend under and behind masonry sill.
(U) Heads of openings, stuccoed wood frame walls:
(A) Material: Sheet metal.
(B) Drip: Form drip on front edge of drip cap and extend
flashing up behind building paper underneath stucco.
(c) Intersections.
(1)
(2)
Provide sheet metal flashing for all horizontal and vertical
intersections of stucco with other materials.
All flashing in connection with masonry walls shall have
flashing or counter-flashing built into masonry not less than
one (l) inch.
(d) Valleys.
(1) Rigid shingle roof covering:
(A) Flash with sheet metal.
(B) Flashing on:
(i) Roof slopes less than seven (7) in twelve (l2);
width, eighteen (18) inches.
(ii) Roof slopes seven (7) in twelve (12) or more,
width, twelve (12) inches.
(2) Asphalt shingle roof covering:
(A) Flash with sheet metal; or
(B) Two (2) thicknesses of mineral surfaced roll-roofing
material cut from rolls weighing not less than eighty-
five (85) pounds per lOO square feet. Bottom strip,
eighteen (18) inches wide; top strip, at least thirty-
six (36) inches wide; lapped twelve (l2) inches.
(e) Roof and wall intersections.
(l)
(2)
Sloping roof: Sheet metal flashings.
Flat roof: Sheet metal or same material as roof covering.
When sheet metal is not used, install forty-five (u5) degree
cant strip at roof and wall intersection.
- LO -
(f) Terrace or porch slabs. Suspended (reinforced) type of bearing
on the ground, which abut wood construction at exterior wall.
(l) Flashing material: Sheet metal.
(2) Extend flashing at finish floors of terrace or porch from
one-fourth (IlL) inch outside exterior face of finish,
turn up four (4) inches behind exterior finish, thence
turn down and through wall under wood construction to one-
half (l/2) inch beyond inside face of foundation. The
horizontal projection of the flashing under the exterior
finish is to be turned down the sides of the terrace or
porch slab to the level where the flashing goes through the
wall.
(g) Chimneys.
(l)
(2)
All chimney and roof intersections, sheet metal flashing.
Cricket or saddle covering: Sh8et metal.
Section 2l-1224: Gutters and Downspouts. When dwelling is provided
with a basement or crawl spacej install gutters and downspouts unless
omission is specifically permitted by Director of Building and Zoning.
(a) lJIaterials.
(1) Copper, sixteen (16) ounce, hard (cornice temper).
(2) Galvanized sheet metal: TWenty-six (26) gauge sheets, l.25
ounce (total weight both sides) zinc coating per square foot.
(3) Solid wood gutters: Paint inside with two (2) coats pitch
or three (3) coats lead and oil after installation.
(b) Basket strainers.
(1)
(2)
Material: Copper wire for copper gutters, heavily galvanized
wire for all other gutters.
Install strainers in all gutter outlets to downspouts.
(c) Roof water disposal.
(1) OUtlets shall not be connected to sewer system or footing
drain tile.
(2) Outlets shall be made acceptable to Director of Building and
Zoning.
Section 2l-l225: Interior wall and ceiling finish. All interior
walls and ceilings shall be of such material as to meet a one-hour
fire resistance rating, as prescribed by the National Board of Fire
Underwri ters .
(a) Lath and plaster.
(1) Wood lath:
(A) Maximum or furring spacing, sixteen (16) inches on center.
(B) Lath, No. l, five-sixteenths (5/16) inch thick.
(C) Space lath one-fourth (IlL) to three eighths (3/8) inch
apart. Break joints every seventh lath, nail at each
bearing.
(2) Expanded metal lath:
(A) Painted or galvanized lath.
(B) Hinimum weights; maximum spacing of supports.
- Ll -
Use
Pounds
per Yard
stud Spacing
(inches)
Walls:
All dwellings .............
One-story dwellings .......
2.5
* 3.4
* 4.0
** 3.0
16
20
24
24
Joist Spacing
(inches)
Ceilings
* 2.75
3.4
-lH!- 3.4
l6
16
24
* Flat rib
*i!- High rib
(3) Insulating fiber board lath:
(A) Minimum thickness, one-half (1/2) inch.
(B) Lath size, eighteen (18) by forty-eight (48) inches. Lath
twenty-four (24) by forty-eight (L8) inches may be used
provided all joints at right angles to the framing
members are covered with continuous strips of metal lath
and ends of lath are nailed to solid bearing (framing
members) at approximately four (L) inches on center
including intermediate supports.
(C) Maximum stud or joist spacing, sixteen (16) inches on
center.
(D) Apply in accordance with manufacturer's directions.
(4) Gypsum lath:
(A) Minimum thickness, three-eighths (3/8) inch.
(B) Size, sixteen (16) by forty-eight (L8) inches.
(C) Maximum stud or joist spacing, sixteen (16) inches
on center.
(D) Apply in accordance with manufacturer's directions.
(5) Lathing:
(A) Heads of openings: Install lath so vertical joints or
first course of lath above head will not occur on
jamb studs.
(B) Corner beads: Galvanized metal, for all external
corners.
(C) Corner and joint reinforcing: Metal lath two and one-
half (~~) inch lap on each surface.
(D) Over solid wood surfaces: Install metal lath on strips
or use furring nails. Lap metal lath on adjoining lath
surfaces.
(6) Plaster:
(A) Hix all plaster (lime and prepared) according to manu-
facturer's recommendations.
(B) Quic k lime, slake thorou ghly ·
(C) Minimum thickness, one-half (1/2) inch over lath base.
Finish all ceilings level and vralls and corners plumb
and straight.
(7) Drying period: Allow sufficient time for plaster to dry
thoroughly before application of trim.
(c) Ceramic tile.
(1) Materials.
- L2 -
(2) Installation:
(A) Stud covering: Fifteen (15) pound asphalt saturated
felt applied shingle style (unless metal lath is
paper-backed) .
(B) Metal lath. For requirements see Section 21-1225 (a) (2)
for types and weights.
(C) Scratch coat: Portland cement plaster, minimum five-
eighths (5/8) inch thick, integrally waterproofed.
Scratch thoroughly. Allow to dry before installing tile.
(c) Shower walls.
(l) Materials: Dense and water repe1lant. Plaster nor plastic
not acceptable.
(2) Installation:
(A) Install in accordance with manufacturer's instructions.
(B) Minimum height: Not below shower head.
(C) Caulk and protect joints at corners, bathtub, top
edges of wainscot and at intersections of wainscot and
other materials. Use moldings designed for the purpose
or other materials satisfactory to the Director of
Building and Zoning.
(d) Dry wall finish.
(1) Ninimum thickness:
Fiber board
.. ~.... 0...0 e. 0... G..... 0
Actual Inches
Spacing of Studs
l6 20 24
l/2 1/2 1/2
IlL 3/8 3/8
1/2 5/8 5/8
1/2 3/L 3/L
Type of
Wall Finish
Wood boards
e.... 0..00... .....Oel.... 0
Plyvlood .. 0 eo. . . . . . 0 0 0 0 10 0 . . . 0 . . . . . . . 0
Gypsum board .......0................
(2) Other types of boards, including compressed dense composition
board less than one-half (1/2) inch thick, may be used when
acceptable to the Director of Building and Zoning. Maximum
stud spacing, sixteen (16) inches on center.
(3) All wood of less than one (1) inch nominal thickness shall
be backed with three-eighths (3/8) inch sheet rock.
(e) Heater room interior finish.
(1) Materials. One (1) hour fire-resistive construction. For
req~irements see NBFU - Building Code - 55.
(2) Installation: Apply over all combustible materials, including
ceiling area , within four (4) feet of heating unit and flue
pipe.
Section 21-1226: Finish floors.
(a) Cement floors:
(1) Mix. For requirements see Section 21-l2l7 (b) and Section
2l.12l7 (k) (2).
(2) Heater room floors on wood construction where solid or
liquid fuel is used:
(A) Minimum thickness, four (L) inches.
(B) Use sheet metal over tops of joints for concrete forms
or cut in one (1) inch boards flush with top of joists.
If wood boards are used remove after the slab has set.
(C) Reinforce slab with wire mesh weighing not less than thirty
(30) pounds per 100 square feet, or with one-fourth (IlL)
inch bars spaced one (l) foot on center each way.
- 43 -
(3) Heater room floors on wood construction where gas burning
equipment raises temperature of floor to above one hundred
sixty (16) degreesJ comply with the provisions of (2) above.
See American Gas Association specifications.
(b) Wood floors. For requirements see Section 21-1220 (c) (5).
(1) Naterials.
(A) Flooring: Kiln-dried material.
(B) strip floonngJ hai:'dwood or softwood, m~n~mum thickness
25/32 inch, maximum width two and one-fourth (2~) inches
for hardwood, three and one~fourth (3\) inches for soft-
wood. Three eighths (3/8) inch thickness may be used
where laid directly on a subf10or. Wider widths (plank
flooring) and parquet flooring may be used when pre-
cautions are taken to prevent warping or cupping.
(C) Nails: Haximum spacing sixteen (l6) inches on center.
(D) Building paper or deadening felt: Apply under all finish
flooring unless floor is insulated.
(2) Installation.
(A) Finish flooring over subflooring: Apply at right angles
to sub flooring except when subflooring is laid diagonally.
(B) Finish flooring on strips; wood strips, minimum size,
one (1) by two (2) inches; maximum spacing, sixteen (16)
inches on center. Apply strips over building paper or
deadening felt on top of subflooring.
(C) Strip flooring on concrete: Apply on not less than two
(2) by two (2) inch sleepers embedded in concrete.
(D) 1'1l'ood block floorings on concrete: Set blocks in mastic
and install in accordance ~~th flooring manufacturer's
directions.
(c) Ceramic tile. For requirements see Section 2l-l220 (c) (5) (iii).
(l) Materials. For requirements see ASTI'1 C l26-52T.
(2) Grade: Not less than Standard Grade.
(3) Setting bed.
(A) ~lfix one (1) part Portland cement, four (L) parts sand; or
one (1) part Portland cementJ two (2) parts sand, and
four (L) parts pea-size aggregate.
(B) 11inimum thickness: One and one-fourth (1\) inches, if
reinforced with wire mesh; three (3) inches when installed
below top of chamfered joists, with finish tile surface
at least one and one-half (~) inches above top of joists.
(L) When applied over wood subfloor: Install asphalt saturated
felt over subfloor underneath the wire mesh.
(d) Rubber tile, asphalt tile, linoleum and wall-to-wall carpeting:
(1) Do not apply rubber tile or linoleum on slabs resting on the
ground. Asphalt tile may be used on slabs bearing on the
ground provided the slab area where the tiles are to be
applied has first been covered with membrane waterproofing.
(2) Hardboard, plywood or similar underlayment leveler having a
nominal thickness of one-fourth (IlL) inch shall be used over
three-fourth (3/L) inch wood subfloors to provide a smooth
flat surface for the finish floor covering (including wall-to-
wall carpeting). Apply in accordance with manufacturer's
recommendations.
(3) Adhesive for flooring to be waterproof; type as recommended by
manufacturer of floor covering.
- LL -
Section 21-1227: Garages.
(a) Garqges attached or built into residential buildings.
(1) The construction of garages attached or built into and made
a part of residential construction shall be of the same
quality as required for the dwelling to which the garage
is attached.
(2) All floors of attached or built-in garages shall be six (6)
inches below the grade of the floor of the residence to
which it is attached or a part thereof.
(3) There shall be no interconnection between a house's forced
air heating system and a garage. Return air register~in
the garage which are connected to the house's heating system
are prohibited.
(U) All walls and ceilings of an attached garage must have a
minimum of a one-hour fire ratinG_ 1.i>Jhere a gab1e:..type roof
is used a one-hour fire resistive bulkhead shall be es-
tablished in the attic space directly above and continuous
from the interior one-hour fire resistive garage wall.
Service doors common to both the dwelling and the garage
shall be composed of materials having a minimum of a one-
hour fire rating. All doors must fit in the, fI'ffine so that
air cannot pass freely around the door when in a closed
position. Doors must be provided with wood or metal
thresholds.
(b) Frame detached garages.
(l) Detached garage on interior lots must be set back 70 feet
from front lot line and shall not be closer than ~10 (2)
feet to the dividing lot line. On corner lots garage shall
be twenty (20) feet from lot line, next to street.
(2) Concrete floor not less than four (L) inches thick re-
inforced with #10 wire screen over a base of crushed stone
or sand at least five (5) inches in depth. Base to be
placed on undisturbed soil. Footings of not less than
twelve (l2) inches wide and not less t~an twelve (12) inches
in depth around entire perimeter of slab.
(3) Sill plates connecting the walls to the floor shall be
bolted to the foundation. Bolts shall be not less than
one-half (1/2) inch in diameter and spaced at eight (8)
foot centers and not more than one foot (1) from each
corner. Bolts shall extend into the concrete eight (8)
inches or more.
(U) t.J all studs shall be spaced at not more than sixteen (16)
inches on center and securely fastened to the bottom plate
which shall be bolted to the floor. A double top plate
shall be required and all wall studs and plates shall be a
minimum of two (2) inches by four (L) inches. Doubling of
studs shall be required at all corners and jambs of openings
more than three (3) feet in width.
(5) Each corner is to be wind-braced outward from the top in
two directions to a minimum of six (6) feet from corner at
the bottom plate. ",rind bracing shall be a minimum of
lxL inches and notched into the studding.
(6) All roof rafters must be at least 2"x6" and spaced not
more than 16n o. c . Ridge board shall be required and of a
size not less than 2"x6". Ceiling ties of at least 2"x611
- L5 -
spaced evenly with a minimum of three. Collar ties at
not mo~e than four (4) foot centers are required on all
common rafter spans more than twelve (l2) feet in width
and of a size not less than 1"x6".
(7) Double 2 i'x8" headers required over main doors nine (9) feet
or less in width and double 2"x1211 headers on doors up to
seventeen (l7) feet in width.
(8) A service door not less than 2tx6" in width and at least
two windows on opposite sides shall be ~equired on all
garages.
(9) Roof sheathing of not less than one-half (1/2) inch thick
plywood or one inch thick nominal size tongue and groove
sheathing.
(c) BriCk detached garages.
(1) Detached garage on interior lot shall be set back seventy
(70) feet from front lot line and shall not be closer than
two (2) feet to dividing lot line. On corner lots garage
shall be twenty (20) feet back of lot line next to street.
(2) Concrete footings not less than four (4) feet below grade
and not less than twenty (20) inches wide and eight (8)
inches thick shall be required. Foundation walls shall
be a minimum of eight (8) inches thick.
(3) Concrete floor shall be the same as required for frame
garages.
(4) Rafters, roof and sheathings shall be the same as required
for frame garages.
(5) Doors and headers shall be the same as required for
frame garages.
Section .21-1228: Reference material ~ Abbreviations and sources.
The following list sets forth commonly used abbreviations, with the
source set forth opposite each abbreviation:
A.C.I. American Concrete Institute, l8263 West McNichols
Road, Detroit, Michigan.
A.I.S.C. American Institute of Steel Construction, New York,
New York.
A.S.T.M. American Society for Testing Materials, 206 South
Broad Street, Philadelphia, Pennsylvania.
F.S. Federal Specifications, U. S. Department of Commerce,
General Service Administration, 219 South Clark Street,
Chicago, Illinois.
N.B.F.U. National Board of Fire Underwriters, 85 John Street,
New York, New York.
N.L.M.A. National Lumber Manufacturing Association,
176 West Adams Street, Chicago, Illinois.
Standard and Specification
Section 2l-1229: Reference Material - Materials, standards and
specifications. The follm~ing list sets forth materials with citations
to source material, standards and specifications:
Aggregates, Concrete
Aggregates, Lightweight
Structural Concrete
Block, Glass
Board, Sheathing
Board, Fiber
Brick, Common
Brick, Concrete
Brick, :Face
Brick, Fire
Cast Stone
Cement, Portland
Cement, Prepared
Masonry (for l'lortar)
Concrete, Masonry Units,
Hollow Load Bearing
Concrete, Masonry Units,
Solid Load Bearing
Finish, Heater Room Interior
Lime, Hydrated
Lime, Quick
Lumber
Shingles, Asbestos Cement
Shingles, Slate
Steel, for Bridges
and Buildings
Stucco
Tile, Ceramic
Tile, Facing, Glazed
and Unglazed
Tile, Footing Drain
Tile, Load Bearing
Tile, Non Load Bearing
Asn1 C 33-56T
AS'IM C 330-53T
NBFU Building Code-55
1\S'lM C 79-54
FS-LLL-F-321b
Asn1 C 6250
AS'IN C 55-52
AS'IM C 216-50
FS-HH-B-671d
ACI 704 -LL
AS'lM C l50-56
Asn1 C 9l-55T
AS'IM C 90-52
AS'lM C 145-52
NBFU Building Code - 55
AS'.n1 C 207-49
AS'.n1 C 5-26
Nl1"l.A 1957 Edition
FS-SS-8-291c.
FS-ss-s-L51
AS'IM A 7-56T
FS-QQ-B-IOlc
AS'IJ\1 C 126-52T
AS'Il'1 C 126-52T
AS'IN C L-55
AS'IM C 34 -55
AS'lM C 56-52
- )-17 -
Section 21-12)0:
Prefabricated Chimneys.
(a) Prefabricated chimneys permitted. In addition to any method of
construction presently authorized within the limits of the Village, a
light-weight, factory-built chimney, approved by Underwriters Labora-
tories, Inc., may be used in place of a tile lined brick chimney in
one-story buildings only, and may be suspended from the ceiling joists
of said building upon the approval of the method of support and
installation by the Director of Building and Zoning as provided in
this Article XII.
(b) Construction and installation requirements. Prefabricated
light-weight, factory-built chimneys shall be constructed and installed
in accordance with the Underwriters Laboratories, Inc., listing and
approval for such chimneys. In addition thereto and when not in
conflict therewith, such construction and installation shall also
conform to the following:
(l) The manufacturer's specifications and instructions issued
with respect to the specific chimney and furnace shall be
followed.
(2) The height above the furnace bre6c'~ng and the draft
characteristics of each installation shall satisfy the
specifications prescribed by the manufacturer of the
furnace and such furnace shall be supplied with a chimney
meeting the recommended specifications for the furnace.
()) That part of the chimney above the roof, housing, top, and
rain cap shall be decorative in appearance and consistent
with the design of the structure to which it is attached.
(c) Submission of plans. Plans and specifications for the installation
of such chimney and the details of the method of support for such
chimney shall be submitted in advance to the Director of Building
and Zoning.
(d) Inspection. After the installation of such chimney, the
builder or installer shall require inspection of the installation by
the Director of Building and Zoning, who then shall in3pect the same
in order to determine whether the standards prescribed in this article
have been complied with and whether such installation conforms to the
plans and specific~tions previously submitted. No further work upon
the premises wherein such chimney is installed shall be carried on so
as to enclose or otherwise conceal any details of such installation
until inspection has been made by the Director of Building and
Zoning and approval secured.
- 48 -
...
.
This ordinance shall be in full force and effect from and
after its passage , approval and publication according to
law.
AYES:
Bergen Colfer Grittani Congreve
NAYS:
Bruhl
Ekren
PASSED THIS
13th day of July, 1966
APPROVED THIS
13th day of July, 1966
ATTEST:
~j/~
Richard H. Monroe
Village Clerk