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
Ron beat me to it – this is NOT your problem. I’m assuming it’s an existing
structure or a lightweight metal frame if new? From a responsible charge
perspective, I think you have to perform your due diligence and consider every
reasonable option regarding type and spacing of hangers, then
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
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
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
I’m a little cautious without seeing a sketch to make sure I’m seeing the
situation correctly, but yes, I’ve used alternate connection locations for the
gauge.
i know my water department has made a pair of matching taps on matching dead
ends so we could make a series of test prior to major
For what it's worth, NFPA 291 is not a standard, it's a "recommended
practice", also in most jurisdictions it's not adopted as a law/rule/etc.
Also the only "body" material in NFPA 13 (and 24) states the volume and
pressure are to be determined from waterflow test data or other approved
Hello Forum,
I have an odd situation that I haven't come across before. We requested a
water test and received a water test from the fire department for a project
that incorporated a private hydrant. The test was performed on the private
hydrant but since there was only a single hydrant on the
10 matches
Mail list logo
