I have done a fairly large number of these jumbo homes and the real issue for any of them is quality of water supply. (As if that is not true in any sprinkler design).
The problems with Jumbo homes are varied but all work against the sprinkler designers and installers. First, our experience has been that the setbacks are usually enormous (I had one relatively recently that was 3,000 ft.) Add elevation or a bunch of bends to this and you can loose it all before you get the house depending upon the pipe size. Second, the final design of the house is always in flux. If you can afford to build such a home...you can afford to tweak it...often. As a result, you are almost continuously trying to route pipe in, over and around obstructions that are added almost daily. Steel beams, LVLs, and architectural issues all are in the way and the moment you think you got it...they move or change it. As a result, a typical say 10% safety factor that is more than fine for most commercial projects...is in jeopardy from day one on a residential job like this. And last but not least or us...the design team will say "The attic will not be used and doesn't need sprinklers" citing code exceptions in 13R yet 3 months later, the owner is having the builder put in flooring. (Now ya got freeze issues (antifreeze anyone plus a reduced pressure bfp per our water purveyor) I used to spec the 2" RSV for most of these projects (TYCO could you please make em again?). However, for combined service, we are almost always having to go BIG pipe (4") to the house just to be sure as most of the owners don't want pumps and/or tanks as the added footprint takes away from the game room or wine cellar. Just my thoughts. Paul Sincaglia, P.E. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of A.P.Silva Sent: Monday, August 20, 2007 12:56 PM To: [email protected] Subject: RE: large single family houses I had this question when designing a 32,000 sq.ft. home. The mech. consultant specified 13D. I recommended 13 or at least 13R. They settled for 13R. But by this time a 2" underground was already installed. They wouldn't give me the 4" underground I needed for designing to 13R. Finally it was designed to 13D for a two head calc and agreed (at my insistence) to provide a pump for a 4 head calc. I can't believe they had money for providing a CO2 system for the elect. room but refused to upgrade the system to 13R. Tony -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Todd Williams - work Sent: August 20, 2007 10:09 AM To: [email protected] Subject: large single family houses What's the latest poop on protecting large single-family residences? It doesn't seem that 13D would be appropriate for the structure, but I don't see anything in any of my Codes that would modify it. Todd G. Williams, PE Fire Protection Design/Consulting Stonington, Connecticut 860-535-2080 www.fpdc.com _______________________________________________ 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) _______________________________________________ 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)
