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An interior standpipe system required in a building, the top floor of which is more than 275 feet above grade, exclusive of space used for sprinkler, elevator, ventilation and other building machinery, shall be separated into two or more zones, each of which shall include a fire pump, pressure maintenance pump, and all other equipment and piping necessary for a complete inside standpipe installation. The lowest system shall serve the portion up to and including the story the floor of which is 275 feet or less above grade. Above 275 feet systems shall be provided to serve zones of not more than 20 stories each.
(Prior code § 91-81; Amend Coun. J. 10-30-96, p. 31261, § 1)