Same issue came up on a 'super' store we recently finished. The engineer's detail that showed the hangers located within 6" of panel points had a note on it saying it applied to all 4" to 8" hangers. The owner's inspector said the branchline hangers needed to be installed within 6" of panel points also. We simply replied "No problem, here's what it's going to cost you". We haven't heard back from them.
Look over the engineer's detail. If it says it applies to 4" to 8" pipe, you should be OK with your branchlines. Ed Kramer Littleton, CO >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)
