The basement level contains electrical rooms, general storage rooms, a small oxygen storage room (250 s quare feet ) enclosed by a two-hour fire rating and a covered exterior loading dock. The building construction is non combustible, Type I I-B and e ach floor is approximately 18,000 square feet. It is important to perform a hazard analysis of the building before attempti ng to size the fire pump.įor example, a new sprinkler system might be installed in a five-story medical office building with a partial basement (overall building height of 69 feet ).
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Though the IBC requires buildings with a highest finished floor located more than 30 feet above the lowest fire department vehicle access to be equipped with Class III standpipes or Class I if the buildin g is fully sprinklered, NFPA 14 : Standard for the Installation of Standpipe and Hose Systems allows the standpipes to be manual type with the necessary pressure provided by the fire department pumper truck through the fire department connection (2013 NFPA 14, Section 5.4.1.1), thus eliminating the standpipe demand from consideration. įor non high-rise buildings, the most demanding area could be any number of different haz ards. In many high-rise buildings, this can be the automatic fire standpipe system demand which requires 500 gallons per minute at 100 pounds per square inch at the top of the most remote standpipe, plus 250 gpm for each additional standpipe, up to a maximu m of 1,000 gpm for wet systems or 1,250 gpm for dry systems.
A fire pump’s size is dictated by the most hydraulically demanding area of the fire protection system.
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