Actually, right now I'm designing a very similar store and in the specs and details it says the same thing in reference to all piping. We have installed many and they have never enforced the branch line piping. However I have noticed in some stores Like Wally world the branchlines are run at those locations and where the head spacing did not work out they had short armovers for those particular uprights. Bad thing is I'm having a time just getting bottom chord sizing for bar joist and girders, I can only imagine trying to get webbing layouts. I'm interested to know how it turns out. Good luck.
Bobby Gillett Designer [EMAIL PROTECTED] (731)-424-0130 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Matthew Stone Sent: Wednesday, June 13, 2007 12:08 PM To: [email protected] Subject: Hanging branch lines from panel points We are installing a grid system in a super store and the general contractor is demanding that we hang all piping within 6" of a panel point of the web-type roof joist. There is a detail showing sprinkler pipe to be installed in this location and a structural drawing showing the location of the main. We naturally installed the main to meet these criteria. The branch lines are run perpendicular to the joists so hangers for the branch lines are spaced at 6'-0" apart which is at every joist. This means that there is a 23 lb load at each hanger. Table 9.1.1.6.1(b) requires a 2 × 2 × 1/8 angle iron and the joists have a 2 x 2 x 3/16 angle iron on top. Has anyone else come across this requirement in the contract drawings and had it applied to all sprinkler pipe? We can use trapeze hangers to meet this demand by the GC but it will also raise the question in those of you who look up when you are in super stores, "Was this system installed by a licensed contractor? Matthew Stone _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field) _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/mailman/listinfo/sprinklerforum To Unsubscribe, send an email to:[EMAIL PROTECTED] (Put the word unsubscribe in the subject field)
