Tony - in the 2003 edition, sections 7.10.1.1.2 and 7.10.1.2.2 address flow rates for 'horizontal' standpipes. They should answer your 1st question.
Ed Kramer Littleton, CO > >I'm designing a class 3 standpipe system for a single storey 300,000 >sq.ft. >metal fabrication plant. No city water, so needs a water storage pond. > >I'm trying to figure out the required storage volume. NFPA requires 500 >gpm >from the most remote standpipe and 500 gpm from each additional stand pipe >(for floor area exceeding 80,000 sq.ft.) with total not exceeding 1250 >gpm, >for a duration of 30 minutes. My opinion is that NFPA 14 mostly covers >multi-storey buildings. When it's single storey, should I take each hose >connection as a standpipe and flow 250 gpm per connection, up to maximum >1250 gpm? It is probably the safest, as it would be the most conservative. >Has anyone come across this situation? > >The other question is regarding hose allowance for fire department. (The >building code water supply requirement does not apply in my area, if the >building has either a sprinkler or standpipe system.) NFPA 14 requires a >standpipe system to be designed for the system demand and fire department >connections. It says to consult the AHJ for water supply from fire >department pumper. Would it be system demand OR demand for fire department >pumper (the larger value and not both simultaneously)? Or should a hose >allowance be used same as for a sprinkler system? If so, for what >duration? > >Another question (while I'm at it), NFPA 14 requires lateral piping to 2 >1/2" hose connections to be protected if the building is not sprinklered. >Up >to now I've never seen piping in a single storey building in fire rated >enclosures. Is it required? > >Tony > >_______________________________________________ >Sprinklerforum mailing list >[email protected] >http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum > >To Unsubscribe, send an email to:[EMAIL PROTECTED] >(Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
