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(a) When more than one (1) standpipe is required in a building the standpipes shall be connected at their bases by pipe of a size equal to or greater than that of the larger standpipe to permit water from any source to supply all standpipes. Where only one (1) standpipe is installed, the supply connections thereto shall not be smaller than the standpipe. Where standpipes are supplied by gravity or pressure tanks located above the standpipe system, the supply pipe therefrom to the standpipe system shall not be smaller in size than the larger standpipe.
(b) Where the water supply is furnished by a gravity tank or a pressure tank located in the building at or above the topmost outlet, a check valve shall be provided below the tank and a stop valve between the check valve and the tank.
(c) Sufficient stop valves or check valves shall be provided to permit cutting off any standpipe riser without interrupting the supply to other risers from the same source of supply. Stop valves which are located above the ground floor and which must be closed to permit continued use of one (1) standpipe in case of failure of another, shall be arranged and equipped to permit operation of such stop valves from the ground floor level, from the pump room or from other accessible locations approved by the Division of Fire. Where necessary to reach manually operated stop valves placed more than six (6) feet above a floor level, fixed incombustible ladders shall be provided.
(d) Each water service connection which directly and independently supplies a stand-pipe system or fire pipe shall be equipped outside of the building in an approved location with a control valve in a flush sidewalk or lawn valve box of an approved type, or with a post indicator valve, clearly marked “Standpipe Supply Control.” Each such water service connection shall be installed in conformity with ordinances governing water service connections and the rules and regulations of the Division of Water and Heat.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
Whenever the height of a building exceeds one hundred fifty (150) feet above grade level a special telephone system for use of the Division of Fire in connection with the operation of the standpipe system shall be provided and shall be installed in accordance with the rules and regulations established by the Board of Building Standards and Building Appeals.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) First-aid hose shall not exceed seventy-five (75) feet in length, and all hose fifty (50) feet or less in length shall be in one (1) piece without intermediate couplings.
(b) Hose shall be within easy reach of a person standing on the floor and in no case shall be more than six (6) feet from the floor.
(c) Hose shall be unlined linen hose or rubber lined cotton hose of types approved by the Board of Building Standards and Building Appeals. Unlined linen hose shall be installed on approved racks of the semi-automatic type, and rubber lined cotton hose shall be installed on approved reels, attached to the hose valve, and ready for use. Racks and reels shall be of a type operable by one (1) man which, when the control valve has been opened, will release the flow of water when the last few feet of hose are pulled from the rack or reel.
(d) Each line of first-aid hose shall be provided with washers at both ends, and shall be equipped with a twelve (12) inch play pipe or nozzle with a one-half (1/2) inch discharge outlet conforming to Fire Division standard.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
In sprinklered buildings first-aid hose may be connected to a sprinkler supply supplied direct by a City water main, in which case dry standpipes may be substituted for wet standpipes required by this Fire Prevention Code.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Standpipe systems shall be equipped with approved outside Siamese connections having check valve clappers in each inlet. The pipe from the standpipe system to any Siamese connection shall not be less than four (4) inches in diameter.
(b) Not less than one (1) Siamese connection with two (2) two and one-half (2-1/2) inch inlets and one (1) four (4) inch outlet shall be provided for each six (6) inch standpipe riser and not less than one (1) such connection for each two (2) four (4) inch risers or fraction thereof. However, not more than four (4) Siamese connections shall be required for any building. Not less than one (1) Siamese connection shall be provided on each street frontage of a building when there are more than two (2) standpipe risers within the building. When a building fronts on only one (1) street and the standpipe system is required to have more than two (2) Siamese connections, such connections shall be distributed along the accessible exterior walls of the premises at such locations as the Fire Chief may direct.
(c) Siamese connections shall be placed not less than eighteen (18) inches nor more than thirty-six (36) inches above the adjoining grade level.
(d) Siamese connections shall not project beyond the street or alley line except when installed on existing buildings under the provisions of Section 389.13(b).
(e) Inlets on Siamese connections shall have female threads conforming to Fire Division standard. Substantial caps to protect the threads shall be provided on each inlet.
(f) Just inside the building from each Siamese, in a horizontal section of the standpipe connection, an approved straightaway check valve shall be placed with an automatic drip valve between the check valve and Siamese to drain the connection to the Siamese and prevent damage due to freezing.
(g) Each Siamese connection shall be suitably marked with an approved durable sign indicating use, i.e., “TO WET STANDPIPE” or “TO DRY STANDPIPE.”
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) On new buildings and on new construction no Fire Division hose connection or Siamese connection shall be constructed so as to project beyond the street or alley line.
(b) When the provisions of this Fire Prevention Code require the installation of standpipes or sprinklers in existing buildings or in connection with existing uses and occupancies, or when because of change of occupancy standpipes or sprinklers are to be installed in existing buildings, and when the installation of recessed hose connections or Siamese connections would result in undue hardship, the Commissioner of Building may approve Fire Division hose or Siamese connections installed so as to project not more than ten (10) inches beyond the street or alley line.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Each required four (4) inch or six (6) inch standpipe riser shall be equipped at each story level with a two and one-half (2-1/2) inch valved outlet with male threads conforming to Fire Division standard and suitable for the hose connection of the Division and located not more than five (5) feet above the floor level. Where first-aid hose is direct-coupled to such standpipes an approved reducing coupling may be installed with not more than seventy-five (75) feet of one and one-half (1-1/2) inch hose connected thereto. The two and one-half (2-1/2) inch valve provided for Division use shall control the water supplied to the first-aid hose.
(b) In addition to the two and one-half (2-1/2) inch valved outlet, where this Fire Prevention Code requires first-aid hose stations to be located in public hallways, corridors or spaces separate from the standpipe locations, a one and one-half (1-1/2) inch branch shall be extended from the standpipe riser to the hose station and equipped with an approved shut-off valve sealed open by an easily broken seal at the point of connection with the standpipe riser. A sign indicating the purpose of the branch and of the shut-off valve shall be permanently secured at or to the shut-off valve. Hose stations of such branches shall have one and one-half (1-1/2) inch hose valves and connections, with not more than seventy-five (75) feet of first-aid hose attached thereto. Threads on hose connections shall be male threads and shall conform to Division standard for one and one-half (1-1/2) inch hose.
(c) Where separate branch lines to first-aid hose stations are provided, and on dry standpipes, the two and one-half (2-1/2) inch valved Division connection shall have a suitable cap to protect the thread.
(d) Where deemed necessary by the Division because of the hazardous nature of penthouse occupancy or above roof uses, two and one-half (2-1/2) inch standpipe outlets shall be provided at the roof level.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
(a) Every wet standpipe required by this Fire Prevention Code shall be permanently connected to an approved primary source of water supply which will furnish water at each hose connection when the valve on the supply is open or automatically opened or, in special cases, when the valve on the supply is opened by the operation of suitably located thermostats. Such primary source shall provide a sufficient flow of water at the highest outlet and at any other outlet and shall be one (1) of the following:
(1) A direct connection to a City water main; provided that the Division of Water and Heat certifies that such main is capable, between 5:00 a.m. and 8:00 pm. on a normal working day, of maintaining a flowing pressure of at least fifteen (15) psi at the highest hose outlet when a street level hydrant supplied by the main, and located within two hundred fifty (250) feet of the connection, is discharging through two and one-half (2-1/2) inch open hydrant butt at the rate of five hundred (500) gallons per minute;
(2) A gravity tank of not less than five thousand (5,000) gallons capacity with bottom not less than twenty-five (25) feet above the standpipe outlet in the top story of the building. When the tank which supplies the standpipe system is also used for domestic water supply, the outlet to the domestic supply shall be placed sufficiently above the bottom of the tank to maintain a reserve of not less than five thousand (5,000) gallons for standpipe use. When a tank which supplies a standpipe system also supplies an automatic sprinkler system, the tank shall have a capacity of five thousand (5,000) gallons in excess of that required for sprinkler use. In the latter case, the connection of standpipe use shall be made to the upper part of the tank so that the tank will retain the required reserve for sprinkler use;
(3) A pressure tank of not less than four thousand five hundred (4,500) gallons capacity (three thousand three hundred (3,300) gallons of water) located in the top story or at a higher level of the building;
(4) Automatic pumps having a combined capacity of not less than two hundred fifty (250) gallons per minute.
(b) Wet standpipe installations with first-aid hose shall be designed on the basis of seventy (70) gallons per minute flowing simultaneously at any two (2) first- aid hose stations at a pressure not less than fifteen (15) psi.
(c) When the pressure at an outlet exceeds fifty (50) psi, an approved reducing disc, adjustable reducer or regulator, set to maintain a pressure of fifty (50) psi on the discharge side with a flow of two hundred (200) gallons per minute through two and one-half (2-1/2) inch hose and nozzle, shall be provided.
(d) Automatic pumps shall have an adequate source of power and shall be supplied from street mains or from well systems, or from other storage systems furnishing not less than one (1) hour’s supply at the rated capacity of the pumps.
(Ord. No. 991-49. Passed 6-27-49, eff. 6-27-49)
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