Article 126Supplement v1, p. 126

COMMERCIAL LAWS SUPPLEMENT

(5) Height — Every masonry chimney shall extend at least

600 millimeters above the part of the roof through which

it passes and at least 600 millimeters above the highest

elevation of any part of a building within 3.00 meters to

the chimney.

(6) Corbeling — No masonry chimney shall be corbeled

from a wall more than 150 millimeters nor shall a masonry

chimney be corbeled from a wall which is less than 300

millimeters in thickness unless it projects equally on each

side of the wall. In the second storey of a two-storey

building of Group A Occupancy, corbeling of masonry

chimneys on the exterior of the enclosing walls may equal

the wall thickness. In every case the corbeling shall not

exceed 25 millimeters protection for each course of brick.

(7) Change in Size or Shape — No change in the size or

shape of a masonry chimney shall be made within a

distance of 150 millimeters above or below the roof joints

or rafters where the chimney passes through the roof.

(8) Separation — When more than one passageway is

contained in the same chimney, masonry separation at

least 100 millimeters thick bonded into the masonry wall

of

the

chimney

shall

be

provided

to

separate

passageways.

(9) Inlets — Every inlet to any masonry chimney shall enter

the side thereof and shall be of not less than 3 millimeters

thick metal or 16 millimeters refractory material.

(10) Clearance — Combustible materials shall not be

placed

within

50

millimeters of smoke chamber or

masonry chimney walls when built within a structure, or

within 25 millimeters when the chimney is built entirely

outside the structure.

(11)

Termination

—

All

incinerator

chimneys

shall

terminate in a substantially constructed spark arrester

having a mesh not exceeding 20 millimeters.

(12) Cleanouts — Cleanout openings shall be provided at

the base of every masonry chimney.

(b) Fireplaces and Barbecues — Fireplaces, barbecues,

smoke chambers and fireplace Chimneys shall be of solid

masonry or reinforced concrete and shall conform to the

minimum requirements specified in this Code.

(1) Fireplace Walls — Walls of fireplaces shall not be less

than 200 millimeters in thickness. Walls of fireboxes shall

not be less than 250 millimeters in thickness: Except, that

where a lining of firebrick is used, such walls shall not be

less than 200 millimeters in thickness. The firebox shall

not be less than 200 millimeters in thickness. The firebox

shall not be less than 500 millimeters in depth. The

maximum thickness of joints in firebrick shall be 10

millimeters.

(2) Hoods — Metal hoods used as part of a fireplace or

barbecue shall not be less than No. 18 gauge copper,

galvanized iron, or other equivalent corrosion-resistant

ferrous

metal

with

all

swams

and

connections

of

smokeproof unsoldered construction. The goods shall be

sloped at an angle of 45 degrees or less from the vertical

and shall extend horizontally at least 150 millimeters

beyond the limits of the firebox. Metal hoods shall be kept

a minimum from combustible materials.

(3) Circulators — Approved metal heat circulators may be

installed in fireplaces.

(4) Smoke Chamber — Front and side walls shall not be

less than 200 millimeters in thickness. Smoke chamber

back walls shall not be less than 150 millimeters in

thickness.

(5) Fireplace Chimneys — Walls of chimneys without flue

lining shall not be less than 200 millimeters in thickness.

Walls of chimneys with flue lining shall not be less than

100 millimeters in thickness and shall be constructed in

accordance with the requirements of this Code.

(6) Clearance of Combustible Materials — Combustible

materials shall not be placed within 50 millimeters of

fireplace, smoke chamber, or chimney walls when built

entirely within a structure, or within 25 millimeters when

the

chimney

is

built

entirely

outside

the structure.

Combustible materials shall not be placed within 150

millimeters

of

the

fireplace

opening.

No

such

combustible

material

within

300

millimeters

of

the

fireplace opening shall project more than 3 millimeters

for each 25 millimeters clearance from such opening. No

part of metal hoods used as part of a fireplace, barbecue

or heating stoves shall be less than 400 millimeters from

combustible material. This clearance may be reduced to

the minimum requirements set forth in this Code.

(7) Area of Flues, Throats, and Dampers — The net

cross-sectional area of the flue and of the throat between

the firebox and the smoke chamber of a fireplace shall

not be less than the requirements to be set forth by the

Board. Where dampers are used, they shall be of not less

than No. 12 gauge metal. When fully opened, damper

opening shall be not less than ninety percent of the

required flue area. When fully open, damper blades shall

not extend beyond the line of the inner face of the flue.

(8) Linte — Masonry over the fireplace opening shall be

supported by a non-combustible lintel.

(9) Hearth — Every fireplace shall be provided with a

brick,

concrete,

stone,

or

other

approved

non-combustible hearth slab at least 300 millimeters

wider on each side than the fireplace opening and

projecting at least 450 millimeters therefrom. This slab

shall not be less than 100 millimeters thick and shall be

supported by a non-combustible material or reinforced to

carry its own weight and all imposed loads.

SECTION

1212.

Fire-Extinguishing

Systems .

—

(a)

Fire-Extinguishing Systems — When required, standard

automatic fire-extinguishing systems shall be installed in

the following places, and in the manner provided in this

Code.

(1) In every storey, basement or cellar with an area of 200

square meters or more which is used for habitation,

recreation, dining, study, or work, and which has an

occupant load of more than 20.

(2) In all dressing rooms, rehearsal rooms, workshops or

factories, and other rooms with an occupant load of more

than

10

or

assembly

halls

under

Group

H

and

I

occupancies with occupant load of more than 500, and if

the next doors of said rooms are more than 30.00 meters

from the nearest safe fire dispersal area of the building or

opening to an exit court or street.

(3)

In

all

rooms

used

for

storage

or

handling

of

photographic

x-ray

nitrocellulose

films

and

other

inflammable articles.

(b) Dry Standpipes — Every building four or more storeys

in height shall be equipped with one or more dry

standpipes.

(1) Construction and Tests — Dry standpipes shall be of

wrought iron or galvanized steel and together with

fittings and connections shall be of sufficient strength to

withstand 20 kilograms per square centimeter of water

pressure when ready for service, without leaking at the

joints, valves, or fittings. Tests shall be conducted by the

owner of the building contractor in the presence of a

representative of the Building Official whenever deemed

necessary for the purpose of certification of its proper

function.

(2) Size — Dry standpipes shall be of such size as to be

capable of delivering 900 liters of water per minute from

each of any three outlets simultaneously under the

pressure created by one fire engine or pumper based on

the standard equipment available.

(3) Number Required — Every building four or more

storeys in height where the area of any floor above the

third floor is 950 square meters or less, shall be equipped

with at least one dry standpipes and an additional

standpipe

shall be installed for each additional 950

square meters or fraction thereof.

(4)

Location

—

Standpipes

shall

be

located

within

enclosed stairway landings or near such stairways as

possible or immediately inside of an exterior wall and

within 300 millimeters of an opening in a stairway

© Compiled by RGL

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