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


Framed Beam Connections

Framed Beam Connections

Framed Beam Connections

What is the most common type of bolt connection for a steel beam to angle, knife plate, etc..., slip or bearing type connection?

If you analyze the connection as a bearing type connection, how, when built, can the designer be assured that the connection is indeed a bearing type connection?  It seems that by tightening the nut would most likely create a slip/friction type connection.  


RE: Framed Beam Connections

If you design a connection as a bearing connection, and for whatever reason the bolts are tightened it really doesn't matter as you, the designer, have based your design on a connection where slight slip is acceptable and the ultimate strength of the connection is based on the bearing strength which is higher than the slip critical capacity.

RE: Framed Beam Connections

Thanks JAE,

I suppose my confusion arises from the statement in the AISC manual regarding framed beam connections.  I don't have the book right now but their is a statement that says "in the unlikely event the connection slips into bearing...  the steel must be checked for bearing stresses" (that statement is not verbatim).  The design examples all seem to reference slip critical connections with a bearing connection as a check for the beam bearing stress "if" the connection slips.  All steel connections will be torqued to some degree, whether specified on plan or not, and would that create a slip critical connection?  I guess my point in all of this, is should we use the lesser values assigned to slip critical bolts, in lieu of the bearing type bolt values.

Your point regarding the acceptable slip in this type of connection makes sense to me.  I am curious if this has ever been a documented concern, though, in residential buildings.  If the connections did slip, would that introduce an impact load on the bolts and also create some bangs in the building?

Maybe I am making a mountain out of a mole hill, but your thoughts are very much appreciated.


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


eBook - Rethink Your PLM
A lot has changed since the 90s. You don't surf the Web using dial-up anymore, so why are you still using a legacy PLM solution that's blocking your ability to innovate? To develop and launch products today, you need a flexible, cloud-based PLM, not a solution that's stuck in the past. Download Now
White Paper - Using Virtualization for IVI and AUTOSAR Consolidation on an ECU
Current approaches used to tackle the complexities of a vehicle’s electrical and electronics (E/E) architecture are both cost prohibitive and lacking in performance. Utilizing virtualization in automotive software architecture provides a better approach. This can be achieved by encapsulating different heterogeneous automotive platforms inside virtual machines running on the same hardware. 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