×
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

top chord joist extensions - typical support condition

top chord joist extensions - typical support condition

top chord joist extensions - typical support condition

(OP)
I have the condition where Type "R" joist extensions for K series joists have an extended span of roughly 4'-0".   

Are tabulated load tables typically based on a simple span or a cantilevered span?  I need to know if the closure piece that I am putting at the "free" end should be designed as load-bearing.  Specifically, I am looking at Vulcraft joists.

Thanks.

RE: top chord joist extensions - typical support condition

Generally for the simple support span distance and the joist end is reinforced for the cantilever... That long a cantilever can be a specialty item and the tables should be used for as a guide only.

Dik

RE: top chord joist extensions - typical support condition

Agreed...

Mike McCann
MMC Engineering
Motto:  KISS
Motivation:  Don't ask

RE: top chord joist extensions - typical support condition

(OP)
I should clarify that I am looking at the "Top Chord Extension Load Table (R Type)" which tabulates top chord joist extensions of up to 6'-0".

 

RE: top chord joist extensions - typical support condition

(OP)
The Vulcraft representative just got back to me - he said that the values in the "Top Chord Extension Load Table" are for a cantilevered support condition.  Deflection must be independantly checked using the tabulated section modulus and moment of inertia.

Thank you for replying to my post.

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