Allan, I just ran into this and was surprised. Typically what I've seen is drop-in anchor or red-head holding down the strut then a strut clamp for the pipe. Had an AHJ recently say that strut wasn't listed and low and behold it's not. you'll find a table that gives values in the case of trapeze so that you can calculate the material in accordance with 13 for trapezes but that's it. What we did was use a drop-in then a rodded up through the strut, through the holes of a pipe strap and then captured the strut and strap with a nut. This was OK to the AHJ since the strap was listed and the strut was merely a block. I suppose we could have used a treated 2x4 or one of those rubber blocks the plumbers used for the stand-off and done just as well or better. In fact there's a job with pipe on the roof that we plan on using the rubber blocks on. I'd check with your AHJ to see what he'll allow. This guy we had through me. Hope this helps.
On Sat, Jun 7, 2008 at 10:28 AM, Allan Seidel <[EMAIL PROTECTED]> wrote: > A sprinkler system, both mains and branch lines, will be supported entirely > from below. There will be no hangers and supports will occur at least every > ten feet. NFPA 13 does not seem to address this condition in any detail. I > can think of many ways to support and anchor the piping. The problem is I > need to know what methods are not permitted. For example, is piping strapped > to a unistrut, point-load style, technically not permitted? > > Thank you, > Allan Seidel > St. Louis, MO > _______________________________________________ > 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) > -- Ron Greenman at home.... _______________________________________________ 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)
