Article 127Supplement v1, p. 127

COMMERCIAL LAWS SUPPLEMENT

enclosure of the balcony or vestibule of a smokeproof

tower or an outside exit stairway.

(5) Siamese Connections — Subject to the provisions of

subparagraph (2) all 100 millimeters dry standpipes shall

be equipped with a two-way Siamese fire department

connection. All 125 millimeter dry standpipes shall be

equipped with a three-way Siamese fire department

connection and 150 millimeters dry standpipes shall be

equipped

with

a

four-way

Siamese fire department

connections.

All

Siamese

inlet

connections

shall

be

located on a street-front of the building and not less than

300 millimeters nor more than 1.20 meters above the

grade and shall be equipped with a clapper-checks and

substantial plugs. All Siamese inlet connections shall be

recessed in the wall or otherwise substantially protected.

(6) Outlets — All dry standpipes shall extend from the

ground floor to and over the roof and shall be equipped

with a 63 millimeters outlet nor more than 1.20 meters

above the floor level at each storey. All dry standpipes

shall be equipped with a two-way 63 millimeters outlet

above the roof. All outlets shall be equipped with gate

valves.

(7) Signs — An iron or bronze sign with raised letters at

least 25 millimeters high shall be rigidly attached to the

building adjacent to all Siamese connections and such

signs shall read "CONNECTION TO DRY STANDPIPE".

(c) Wet Standpipes — Every Group H and I Occupancy of

any height, and every Group C Occupancy of two more

storeys in height and every Group D, D, E, F, and G

Occupancy of three or more storeys in height and every

Group G and E Occupancy over 1800 square meters in

area shall be equipped with one or more interior wet

standpipes extending from the cellar or basement into

the topmost storey: Provided, That Group H buildings

having no stage and having a seating capacity of less

than

500

need

to

be

equipped

with

interior

wet

standpipes.

(1)

Construction

—

Interior

wet

standpipes shall be

constructed of the same materials as those required for

dry standpipes.

(2) Size — (2.1) Interior wet standpipes shall have an

internal diameter sufficient to deliver 190 liters of water

per minute under 2.0 kilograms per square centimeter

pressure at the hose connections. Buildings of Group

Hand I Occupancy shall have wet standpipes systems

capable of delivering the required quantity and pressure

from

any

two

outlets

simultaneously;

for

all

other

occupancies only one outlet need be figured to be

opened at one time. In no case shall the internal diameter

of a wet standpipe be less than 50 millimeters, except

when

the

standpipe

is

attached

to

an

automatic

fire-extinguishing system.

(2.2) Any approved formula which determined pipe sizes

on a pressure drop basis may be used to determine pipe

size for wet standpipe systems. The Building Official may

require

discharge

capacity

and

pressure

tests

on

completed wet standpipe systems.

(3) Number required — The number of wet standpipe

when required in this Code shall be so determined that all

portions of the building are within 6.00 meters of a nozzle

attached to a hose 23.00 meters in length.

(4) Location — In Group H and I Occupancies, outlets shall

be located as follows: one on each side of the stage, one

at the rear of the auditorium and one at the rear of the

balcony. Where occupant loads are less than 500 the

above

requirements

may

be

waived:

Provided, That

portable fire-extinguishers of appropriate capacity and

type are installed within easy access from the said

locations. In Group B, C, D, E, F, and G Occupancies

location

of

all

interior

wet

standpipes

shall

be

in

accordance with the requirement for dry standpipes:

Provided, that at least one standpipe is installed to cover

not more than 650 square meters.

(5)

Outlets

—

All

interior

wet

standpipes

shall

be

equipped with a 38 millimeter valve in each storey,

including the basement or cellar of the building, and

located not less than 300 millimeters nor more than 1.20

meters above the floor.

(6) Threads — All those threads used in connection with

the installation of such standpipes, including valves and

reducing fittings shall be uniform with that prescribed by

the Secretary.

(7) Water Supply — All interior wet standpipes shall be

connected to a street main not less than 100 millimeters

in diameter, or when the water pressure is insufficient, to

a

water

tank

or

sufficient

size

as

provided

in

subparagraph (8). When more than one interior wet

standpipe is required in the building, such standpipe

shall be connected at their bases or at their tops by pipes

of equal size.

(8) Pressure and Gravity Tanks — Tanks shall have a

capacity sufficient to furnish at least 1,500 liters per

minute for period of not less than 10 minutes. Such tanks

shall be located so as to provide not less than 2 kilograms

per sq. cm. pressure at the topmost base outlet for its

entire

supply.

Discharge

pipes

from

pressure

tanks

extend 50 millimeters into and above the bottom of such

tanks. All tanks shall be tested in place after installation

and proved tight at a hydrostatic pressure fifty percent in

excess of the working pressure required. Where such

tanks are used for domestic purposes the supply pipe for

such purposes shall be located at or above the center line

of such tanks. Incombustible supports shall be provided

for all such supply tanks and not less than a 900

millimeters clearance shall be maintained over the top

and under the bottom of all pressure tanks.

(9) Fire pumps — Fire pumps shall have a capacity of not

less than 1,000 liters per minute with a pressure of not

less than 2 kilograms per sq. cm. at the topmost hose

outlet. The source of supply for such pump shall be a

street water main of not less than 100 mm, diameter or a

well or cistern containing a one-hour supply. Such pumps

shall be supplied with an adequate source of power and

shall be automatic in operation.

(10) Hose and Hose Reels — Each hose outlet of all interior

wet standpipe shall be supplied with a hose not less than

38 millimeters in diameter. Such hose shall be equipped

with a suitable brass or bronze nozzle and shall be not

over 23.00 meters in length. An approved standard form

of wall hose reel or rack shall be provided for the hose and

shall be located so as to make the hose readily accessible

at all times and shall be recessed in the walls or protected

by suitable cabinets.

(d) Basement Pipe Inlets — Basement pipe inlets shall be

installed in the first floor of every store, warehouse, or

factory where there are cellars or basements under same:

Except ,

wherein

such

cellars or basements there is

installed a fire-extinguishing system as specified in this

Code or where such cellars or basement are used for

banking purposes, safe deposit vaults, or similar uses.

(1) Material — All basement pipe inlets shall be of cast

iron, steel, brass, or bronze with lids of cast brass or

bronze and shall consist of a sleeve not less than 200

millimeters in diameter through the floor extending to

and flush with the ceiling below and with a top flange,

recessed with an inside shoulder, to receive the lid and

flush with the finished floor surface. The lid shall be a

solid casting and shall have a ring lift recessed on the top

thereof, so as to flushed. The lid shall have the words "FOR

FIRE DEPARTMENT ONLY, DO NOT COVER UP" cast on

the top thereof. The lid shall be installed in such a manner

as to permit its removal readily from the inlet.

(2) Location — Basement pipe inlets shall be strategically

located and kept readily accessible at all times to the Fire

Department.

(e) Approval — All fire-extinguishing systems, including

automatic sprinklers, wet and dry standpipes, automatic

chemical extinguishers, basement pipe inlets, and the

appurtenances thereto shall meet the approval of the fire

© Compiled by RGL

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