×
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

Pipe Support

Pipe Support

Pipe Support

(OP)
The structural engineer has a note that all hangers and attachments to joist shall be concentric with the top and bottom cord over 100 pounds must be @ panel points or reinforced. I have two questions.
1st does concentric mean that the threaded rod hanger for sprinkler pipe would need to be installed down thru the bar joist? It is currently installed with a beam clamp to the outside from the top cord. The way I understand the definition of concentrically applied load means the center not on the outside. I never see the installation of pipe being supported with the threaded rod installed into the center of the joist have I been inspecting incorrectly?

2nd. NFPA 13 states 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 (115 kg) applied at the point of hanging. The structural engineer states applied loads over 100 pds must be over a panel point. I have 1" sprinkler pipe based on the NFPA 13 would 1" sprinkler pipe need to be supported over a panel point since the minimum is 250 pds?

Thanks for your responses.

RE: Pipe Support

In my practice, a side-mounted beam clamp would not meet the concentricity requirement. And it sounds like your interpretation of the engineer's 100-pound requirement is correct - you have to put the loads under the panel points, or else field-reinforce the bottom chords where the loads occur.
Dave

Thaidavid

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