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<http://www.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
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