×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Hanging from drywall ceiling, brand new method

Hanging from drywall ceiling, brand new method

Hanging from drywall ceiling, brand new method

(OP)
Not one of ours, just found it on the internet thankfully

RE: Hanging from drywall ceiling, brand new method

But no doubt specifications had 22 pages of specifications devoted to not applying thread tape to the inside of fittings but only to the outside of pipe threads.

RE: Hanging from drywall ceiling, brand new method

Are those hangers listed? :)

RE: Hanging from drywall ceiling, brand new method

Cvpc pipe??

RE: Hanging from drywall ceiling, brand new method

I have seen an upper pipe used as a support for a lower pipe. But I do not know if that is OK. Would you need to do load calculations to make sure the upper pipe and its supports would handle the weight?
If the pipe is CPVC, are those hangers listed for plastic pipe? The nuts holding the hanger on the threaded rod do not look as it they came with the hanger. Now that the ceiling has had holes poked in it, isn't the fire rating of the ceiling compromised?


RE: Hanging from drywall ceiling, brand new method


9.1.1.2 Hangers certified by a registered professional engineer to include all of the following shall be an acceptable alternative to the requirements of Section 9.1:


(1)
Hangers shall be designed to support five times the weight of the water-filled pipe plus 250 lb (114 kg) at each point of piping support.


(2)
These points of support shall be adequate to support the system.


(3)
The spacing between hangers shall not exceed the value given for the type of pipe as indicated in Table 9.2.2.1(a) or Table 9.2.2.1(b).


(4)
Hanger components shall be ferrous.


(5)
Detailed calculations shall be submitted, when required by the reviewing authority, showing stresses developed in hangers, piping, and fittings, and safety factors allowed.



9.2.1.3* Building Structure.

9.2.1.3.1 Unless the requirements of 9.2.1.3.3 apply, sprinkler piping shall be substantially supported from the building structure, which must support the added load of the water-filled pipe plus a minimum of 250 lb (114 kg) applied at the point of hanging, except where permitted by 9.2.1.1.2, 9.2.1.3.3, and 9.2.1.4.1.




NFPA 25::



5.2.2.2 Sprinkler piping shall not be subjected to external loads by materials either resting on the pipe or hung from the pipe.



I thought NFPA 13 use to say "do not hang sprinkler pipe from sprinkler pipe"????

RE: Hanging from drywall ceiling, brand new method

I think the original post was meant as sarcasm to show the "not so smart" things we see frequently.

You are not supposed to support sprinkler piping from other sprinkler piping. But, you can use piping as a trapeze member - just not live water filled sprinkler piping.

Yes, there are several criteria to which hangers must meet to be considered acceptable. It is obvious that the pic to start the thread does not meet any of those...well, maybe the rod sizing is correct and the ring size for the piping. But that is about it.

Travis Mack
MFP Design, LLC
www.mfpdesign.com
"Follow" us at https://www.facebook.com/pages/MFP-Design-LLC/9221...

RE: Hanging from drywall ceiling, brand new method

Could be a trapeze member above the drywall.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

White Paper - Design for Additive Manufacturing
With a growing number of parts manufactured directly by additive manufacturing techniques, it is important to lay down design principles suitable for such manufacturing processes and to ensure parts are designed for additive manufacturing. There are several factors that are to be considered at the design stage. Few such design issues in additive manufacturing are discussed in this paper. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close