The building code provides the appropriate reference with regards to
structural loading. Heres the code path;
2006 IBC 1604.2 Strength > 1606.1 General > 1602.1 Definintions-Dead
Load ("The weight of materials of construction incorporated into the
building, including but not limited to..............fire sprinkler
systems" > 1606.2 Design Dead Load.
But that didn't answer your question. In my opinion NFPA-13 only applies
to the hanger assembly itself. Does that mean the sprinkler designer is
off the hook ?. By no means someone has to do the load calculation
otherwise the application is incomplete.
Hope that helps
John Drucker
Fire Protection Subcode Official (AHJ)
Red Bank, New Jersey
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Todd
Williams - FPDC
Sent: Friday, July 25, 2008 2:40 PM
To: [email protected]
Subject: beam strength for hangers
NFPA 13 (2002) 9.1.1.2(1) states that "Hangers shall be designed to
support five times the weight of water-filled pipe plus 250 lb at each
point of piping support." Does this mean the hanger assembly only, or
does make it incumbent on the structural steel to actually support this
load as well? For a 10 ft piece of 4" sch 10, this would equate to a
point load of 839 pounds. We have to get some information to a CE to
figure out how to hang a system.
Todd G. Williams, PE
Fire Protection Design/Consulting
Stonington, Connecticut
www.fpdc.com
860.535.2080
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