That’s the same formula I had from an old ASCOA handbook dons ago. It’s very rough and dirty but generally works.
Travis Mack, CFPS, CWBSP, RME-G, SET 480-505-9271 x700 MFP Design, LLC www.mfpdesign,com Send large files to MFP Design via: https://www.hightail.com/u/MFPDesign Sent from my iPhone > On Dec 16, 2019, at 11:25 AM, Michael Hill via Sprinklerforum > <[email protected]> wrote: > > > I have an old cutout from an AFSA Tech Talk… from August 1992 that gives a > pipe length formula. > > A/6 x B = Length of pipe that can be installed in open web bar joist. > > A = Depth of bar joists (expressed in inches) > B = Distance between bar joists (expressed in feet) > > It is a general formula and does not necessarily mean every diameter of > determined length will work. > > Mike Hill > > From: Sprinklerforum [mailto:[email protected]] > On Behalf Of Prahl, Craig/GVL via Sprinklerforum > Sent: Monday, December 16, 2019 1:18 PM > To: [email protected] > Cc: Prahl, Craig/GVL <[email protected]> > Subject: Routing pipe through bar joist - clearance issues > > I’ve got a structural guy wanting to substitute bar joist for wide flange > steel. The issue is clearance. They just assumed if they provided bar joist > we could run our piping in the webs of the joist which would put us 1 – 5 ft > above the ceiling. > > The spacing between joists is unknown but could be “close”. > > So the question, does anyone have any cheat sheets or spreadsheets showing > the maximum diameter of pipe based on a full length stick that can be routed > up within bar joist based on the bar joist spacing and depth? > > Craig Prahl | Jacobs | Group Lead/SME – Fire Protection | 864.676.5252 | > [email protected] | www.jacobs.com > 1041 East Butler Road Greenville, South Carolina 29606 > > > > NOTICE - This communication may contain confidential and privileged > information that is for the sole use of the intended recipient. Any viewing, > copying or distribution of, or reliance on this message by unintended > recipients is strictly prohibited. If you have received this message in > error, please notify us immediately by replying to the message and deleting > it from your computer. > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://lists.firesprinkler.org/listinfo.cgi/sprinklerforum-firesprinkler.org
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