Skyler
We used to see WSRB or FM jobs with 0.39 gpm/sf over 5,600 sf as standard
warehouse design. Based on previous engineers comments we normally said
structural plans had to reserve 2.5 lbs/sf for sprinklers where they were
deferred permit, which was always.
2.5 was conservative. Sometimes
The structure needs to support a larger point load (with a very complex
explanation, it probably does). Otherwise, if a guy working on the roof
were to stand on one foot, the structure could potentially collapse.
Structural engineering calculations are extremely complex (I would say more
so than o
...@lists.firesprinkler.org] On
Behalf Of Ron Greenman via Sprinklerforum
Sent: Wednesday, June 03, 2020 9:41 AM
To: sprinklerforum@lists.firesprinkler.org
Cc: Ron Greenman
Subject: Re: Structural Load
And remember the building does not belong to you and it is NOT your
responsibility to come up with a
And remember the building does not belong to you and it is NOT your
responsibility to come up with a solution. The owner, via his
representatives (the GC, the structural engineer, and ultimately, the
architect) is responsible for building a code-compliant building that
includes supporting any live
I agree with Ken. I have been down this road before. The structure needs
to support the piping plus 250 pounds at the point of hanging. If the
structure can handle this load, then the structure has an issue.
Thanks,
John
John August Denhardt, PE
*Vice President, Engineering and Technical Servic
Jerry,
Although I'm slightly unclear over what you're being told I would make
sure that whoever is providing that information to you has read
9.2.1.3.1 of the '16 edition of -13:
9.2.1.3.1 Sprinkler piping shall be substantially supported from the
building structure, *which must support
Building loads may use a different safety factor
from the 2019 NFPA 13 table A.18.5.9
4" sch 1011.78 lbs/ft if hangers are every 10' that's 117.8 lbs
at each hanger. hangers every 15' 177lbs.
Sprinkler design safety factor is 5 times + 250 lbs
they MAY design a 5 times dead load
I have a building where they are telling me the structural point loading on
the framing less than 250lbs. (140lbs)
Advice?
Jerry Van Kolken
Millennium Fire Protection Corp.
2950 San Luis Rey Rd.
Oceanside, CA 92058
(760) 722-2722 FX 722-2730
