The other day there was a good discussion on pipe that can run within the open-webbing of steel joists.
Is there a good rule of thumb or any references to determine how long a pipe can be to fit within the joists? I'm wondering if there's some tool or resource that says for 16" joists that has 2" web spaced at 4 feet, I can use only a 10.5 foot pipe length. It may not exist, just curious if it does already in some fashion. Posted anonymously for discussion. Discuss This | Submit a Question | Subscribe
4 Comments
Wayne Ammons
4/26/2019 06:45:54 am
There is an old formula and diagram for this. I could not find a website that showed it and am not sure the best way to get it to you, so I have copied an excel file to Dropbox that has the formula and diagram:
Reply
steve bahr
4/26/2019 10:24:49 am
I will look around. I have charts that show all of this. Somewhere...
Reply
James Phifer
4/26/2019 10:36:10 am
I have used a formula in the past that was created by Ed Miller from AFSA back in 1992. It's a bit conservative but at least I know the pipe will fit.
Reply
Bobby V
5/8/2019 04:52:53 am
When I was designing, the rule of thumb was to use 10’-6” pipe lengths for exposed construction installations. For a new system installation in an existing building with hard ceilings (or lay-in), I would use 6’-0” pipe lengths. However, always consult with your installing foreman, they are the experts.
Reply
Leave a Reply. |
Free SignupSubscribe and learn something new each day:
CommunityThank You to Our Top
October '20 Contributors!
Your PostThe ToolkitSprinkler Designer or Engineer?
Get all of our tools, including the Sprinkler Database, Friction Loss Calculator, Fire Pump Analyzer and more: Filters
All
Archives
January 2021
Daily
Daily discussions are open-ended fire protection, fire alarm, and life safety questions submitted anonymously for the benefit of sharing expertise and learning from other perspectives. Anyone can submit a question here:
Exam Prep2020 PE Prep Guide
(Available Now!) PE Prep Series
(Available Now!) 2020 PE Prep Series
Current Leaderboard (Click to enlarge) PE Problems
Visit July-October for daily Fire Protection PE Exam sample questions.
Solutions are posted the day after posting. Comment with your solutions, questions or clarifications. Please note that questions posted are unofficial and in accordance with NCEES rules are intended to be similar to actual exam questions, not actual exam questions themselves. |