Are there ever scenarios where fire sprinkler branch pipe would not be perpendicular to structure?
As I understand it, running perpendicular to structure affords installers the most flexibility in hanging locations and avoids having to use trapeze supports throughout a project where support from the floor/roof assembly isn't possible. Just curious if branch pipe perpendicular to structure is an always scenario or just a prevailing scenario. Thanks in advance, appreciate your all's input. Posted anonymously for discussion. Discuss This | Submit Your Question | Subscribe
5 Comments
Mike
12/28/2020 09:06:10 am
Depends if you have a concrete roof or floor deck above. Too many different possibilities to give you a definitive answer.
Reply
FIREPE25
12/28/2020 09:19:35 am
It all depends. If the deck is concrete then the pipe can be run in any direction due to ease of hanging in concrete. If the deck is metal and sammy express are permitted into the metal deck the pipe can also be run in any direction. Otherwise trapeze hangers would be required, which are a LOT more work.
Reply
12/28/2020 09:36:18 am
Nothing is "written" as to branch lines running perpendicular to structure, it is both more economical and easier to install them this way.
Reply
Glenn Berger
12/28/2020 09:50:39 am
Another application is one where there is a minimum headroom to be maintained above the floor. This is a gotcha moment to many Contractors.
Reply
CY
12/29/2020 12:07:53 pm
i had a situation where the lenght of the purlin was greater that he dimension required from the sprinkler deflector to the ceiling (it was exceeding an inch or so) so we had to project the BL's pararell to the secondary structure.
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. |