weight of sprinkler systems

[Lutfi]

I am away from my office; can anyone confirm 6 PSF allowance for water based sprinkler system?

Regards,
Lutfi

 

[JAE]

Past calcs I've done have come up at about 2.5 psf. This was for a wet pipe system in a large warehouse.

 

[dik]

Last time I was involved with sprinkler loads, was related to a pre-engineered building and they assumed 3 psf... same ballpark for wet system...

Dik

 

[miecz]

It's best to take a look at the piping layout, as some areas will be much more heavily loaded tahn others. Seems to me that the maximum I've found is 6 psf. Wet pipe weights:

Dia.
1" 2.2 plf
2" 5.2 plf
3" 10.8plf
4" 16.4plf
5" 23.5plf
6" 31.7plf

 

[valleyboy]

I've just completed a school with a sprinkler system - on the advice of the supplier I included a UDL of 0.3kN/sq.m which is approximately 6 psf.

I would agree with jmiec however and examine the pipe runs - there are primary pipes which are larger diameter (and hence heavier loaded) than the smaller secondary runs.

 

[ArneG]

Always look at the pipe runs, I hate to go out on a site visit and see a 9" diameter main running parallel to a typical K series bar joist.

OUCH!

 

[Lutfi]

Many thanks to all. Based on my talks with Fire Protection Engineer and project layout, 6 PSF is a reasonable load.



Regards,
Lutfi