Joe
Actually NFPA does allow pipe to be run under buildings if certain
precautions are taken.  Keep reading 10.6 including 10.6.2.  Not a good
practice to run under the slab but you can do it per NFPA.  Don’t be an AHJ
and stop reading when you see what you want to see!!  There is usually more
than meets the eye.  
Geoff Dyce

-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Joe Burtell
Sent: Friday, January 12, 2007 11:40 AM
To: [email protected]
Subject: FW: Fire Mains


Here is a good example why we don’t run fire supply mains under building
slabs. NFPA has prohibited this for years but I still Architects and
Engineers design underground fire supply mains under the slab to interior
mechanical rooms. Fire sprinkler risers should always be installed at
exterior walls to prevent what just happened at Sky View High School. Please
pass this along to anyone in your firm who specifics location of fire supply
mains.

NFPA 13 2002
10.6 Protection Against Damage
10.6.1 Pipe shall not be run under buildings.
Piping located under buildings is extremely difficult to repair, which is
one of the reasons that 
10.6.1 prohibits the installation of pipe under buildings. When buildings
are built over exist- 
ing underground piping, the piping should be rerouted around the new
building. When piping buildings requires repair, operations in the building
must be curtailed, equipment may 
need to be moved, and the floor must be excavated. Leaks in the buried
piping underneath the building can go undetected for long periods, and they
can also undermine the building support. The location of system valves in
the center of a building also places the system controls in the center of
the building, which may not be desirable during a fire event.

http://www.billingsgazette.net/articles/2007/01/11/news/local/25-skyview_g.t
xt




Joe Burtell, SET, CFPS
Burtell Fire Protection, Inc.
[EMAIL PROTECTED]
www.burtellfire.com
 


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