Beam depth keeps me from going up. Already using obstructed beam rules. 18" beams. If pipe tight to beam then bottom of pipe is 21.5" and a pendent would be about 24" below deck.
I think they need sprigs or arm overs. But before I raise issues about this I wanted to be sure others thought it had to have sprigs or arm over as well. Travis Mack, SET MFP Design, LLC "Follow" us on Facebook: https://www.facebook.com/pages/MFP-Design-LLC/92218417692 Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On Jan 13, 2017, at 4:41 PM, Hinson, Ryan <[email protected]> wrote: > > You did not say you could not raise the 3” pipe. Couldn’t you raise it and > put pendants in? Since the piping is obviously exposed, is there any reason > you can’t comply with deflector-to-deck distances if you do that? If the > pendants extending below the piping is a height or > exposure-to-mechanical-damage issue, install a listed headguard on it. > > Ryan L. Hinson, PE*, SET** \ Burns & McDonnell > Senior Fire Protection Engineer > O 952-656-3662 \ M 320-250-5404 \ F 952-229-2923 > [email protected] \ burnsmcd.com > 8201 Norman Center Drive, Suite 300 \ Bloomington, MN 55437 > *Registered in: MN, PA, & TX > **NICET IV - Water-Based Systems Layout > > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Travis Mack > Sent: Friday, January 13, 2017 5:25 PM > To: [email protected] > Subject: Uprights on 3" pipe > > In a light or ordinary hazard area, would you be able to justify uprights > directly on a 3" main? > > I have been hired to do the 3D coordination of a project designed by a > consultant. The consultant indicated uprights directly on the 3" main. > > I can justify it in that the main is non-structural and this is a light > hazard area. However, there is also the section that states you can not put > uprights on pipe 3" and larger without a sprig or arm over that would comply > with the 3x rule. > > There is no room to lower the pipe and I am semi-restricted from lateral > movement for various other reasons. > > What does the collective wisdom think with this scenario? And I don't need > formulae with a hundred exponents and variables to figure this out. > > Have a great weekend. Thanks in advance. > > > Travis Mack, SET > MFP Design, LLC > "Follow" us on Facebook: > https://www.facebook.com/pages/MFP-Design-LLC/92218417692 > Send large files to MFP Design via: > https://www.hightail.com/u/MFPDesign > > Sent from my iPhone > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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