×
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

Jobs

CPVC hangers

CPVC hangers

CPVC hangers

(OP)
For CPVC piping, in NFPA 13 2013 which allows cumulative sprinkler hanger distances, I can't find a maximum unsupported length.

"9.2.3.2.5* A single section of pipe shall not require a hanger when the cumulative distance
between hangers on the branch line does not exceed the spacing required by Table 9.2.2.1(a)
and Table 9.2.2.1(b)."

In the blazemaster listing (for example) I see a section about vertical support of sprinkler piping - the vertical support can be on two sides of every sprinkler/sprinkler drop or directly before a sprinkler/sprinkler drop. The dimensions given for "one support" is 1'-0 for 1" CPVC, for example.

I'm trying to determine three things:

1. Can this "vertical support", if it's something like a standoff hanger, be counted as a support not only against upward thrust, but also as a pipe hanger (keeping it suspended when sprinkler is not active) itself. I suspect the answer is yes so my next questions are:

2. If you have a 1" blazemaster CPVC pipe going to a sprinkler, what is the maximum distance the centerline of the sprinkler can be from the nearest hanger.

3. Can the hanger be on the CPVC cross main?

I've read the listing/NFPA 13 2013, just want to verify I'm interpreting it right.

RE: CPVC hangers

(OP)
After more research it appears 1. yes if the listing says it can be used as a restraint and a hanger (some do)
2. 1'-0
3. Not unless the hanger on the cross main is less than 1'-0 (linear) from the sprinkler or sprinkler drop, assuming the arm over is 1" blazemaster.

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!


Resources