Wouldn't the blocking only have to meet the 1x WP + 250# as wouldn't it be considered an extension of the building structure/a trapeze?
Damien Shannon. On 5 June 2015 at 17:27, Steve Leyton <[email protected]> wrote: > 2x4 and 2x6 blocks have been casually used for years but we've learned in > the past 10 or so that they are NOT adequate by conventional engineering > standards and the 5x WP + 250# equation. For example, TrusJoist has block > details showing 4x4 members for piping up to 3 or 4" but that's only for > certain truss series and spacing that will support the loads of larger > pipe. You'll see a lot of details and listing limitations for certain > application of fasteners that are limited to 2" pipe, which goes to the > ability of the member to handle the load, not necessarily the capacity of > the blocking it's attached to when blocking is used. > > I think the best answer to your question as asked is: Yes - for > engineered products such as joists and trusses, consult the manufacturer's > installation and reference materials and/or consult with the structural > engineer of record. > > Steve L. > > -----Original Message----- > From: Sprinklerforum on behalf of JD Gamble > Sent: Fri 6/5/2015 9:12 AM > To: [email protected] > Subject: suspending from wood members attached to structural > > What are the general guidelines for attaching to wood members attached to > structural wood trusses. > > > > Example: Suspending 1 ΒΌ" steel sch 40 pipe using a 3/8 Sammy , ATR, and a > adjustable swivel hanger from a 2x4 nailed between two wood trusses? (I > don't see where this is an acceptable method of installation, but don't > want > to miss the forest for the trees either) > > > > Surveying some existing work and trying to make a fair assessment of > additional hanger changes. > > > > Thanks, > > > > Life Safety Solutions of Sheridan > > > > JD Gamble > > [email protected] <mailto:[email protected]> > > (307) 763-3361 > > > > > > --- > This email has been checked for viruses by Avast antivirus software. > https://www.avast.com/antivirus > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > > _______________________________________________ > Sprinklerforum mailing list > [email protected] > > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org > -- *Damien Shannon* _______________________________________________ Sprinklerforum mailing list [email protected] http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
