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187'F3 <br />Class 1, ..wet standpipe system for use by <br />the fire department and those trained in handling <br />heavy fire streams ~~2-1/2" hosed ; <br />Gass 2. A wet standpipe system for use by <br />the building occupants until the arrival of the <br />fire department ~1~1/2" hose; <br />Class 3. A wet standpipe system for use b <br />Y <br />the fire department ~2~-1/2" ar larger hose}. <br />.A combination standpipe system. A combined <br />sprinkler and wet standpipe system is where the <br />water piping serves both 2-1/Z inch hose outlets <br />for fire department .use and outlets sprinkler <br />heads for automatic sprinklers. <br />~12~ Section 3803,,_,,,,~tandpipes, is hereby amended by <br />adding Subsection ~.f ~.. to read: <br />~.f~ Location of combination standpi e s stem. A <br />combination standpipe shall be provided for each stair-~ <br />way or smoke-proof enclosure which extends from the <br />top floor to the ground story in buildings four or more <br />stories in height. Combination standpipe systems shall <br />have outlets so located that all portions of the build- <br />ing and all rooms and other spaces are within 20 feet <br />of the nozzle attached to l00 feet of hose. <br />1. Size. Combination standpipe systems <br />~~ <br />shall be nit less than four inches in diameter in <br />buildings in which the highest outlet is less than <br />75 feet from the fire department connection and <br />shall be not less than six inches in diameter where <br />the highest outlet is 75 feet or more above that <br />connection. <br />2. Construction and .Testing. Fittings and <br />connections shall be of sufficient strength to with-~ <br />stand 300 pounds of water pressure per square inch <br />when ready for service. All combination stand- <br />pipes shall be tested hydrostatically to withstand <br />such pressure for two hours, but in no case shall <br />the pressure be less than 50 pounds per square <br />inch above the maximum working pressure. <br />3. Riser shut-off valve and drain. Each <br />individual riser. shall be equipped with an OS and <br />Y valve at its base and an approved valve far <br />draining. <br />4. Fire department connections. All four- <br />inch combination standpipes shall be equipped <br />with two-way fire department connections. All <br />six--inch combination standpipes shall be equipped <br />with four~way fire department connections. Com- <br />bination standpipe systems with three or more <br />standpipes shall be provided with at least four- <br />way fire department inlet connections. Each fire <br />department connection shall be located on a street <br />Ordinance ~ 8 <br />