×
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

Shear connection

Shear connection

Shear connection

(OP)
I am in the process of designing a shear connection.  I know there is a provision that requires the connection to take place in the upper half of the beam (or a given maximum distance from the top of the beam).  I can't seem to find this requirement.  Code is AISC 9th edition (although I will accept references from the 13th).

RE: Shear connection

There is not a specific requirement - the code just requires that points of support be restrained from twisting about their longitudinal axis - this results in most connections being a minimum depth of the T distance over 2.  See:

http://www.modernsteel.com/steelinterchange_details.php?id=916

RE: Shear connection

The guideline, is that the minimum depth of the connection should be at least T/2, or half-depth.  This is primarily intended to provide minimal restraint and erection stability.     

http://www.FerrellEngineering.com

RE: Shear connection

(OP)
Is there any reference as to the connection being in the top 1/2 of the beam?  I thought there was.

I have a W18x35 where due to existing conditions the first bolts is going to have to be 6" down from the top flange of the beam.  I thought there I remembered seeing a provision that said this was acceptable.  Maybe not.  I do plan on using a 3 bolt connection with 12" long angles (greater than d/2).

RE: Shear connection

Maybe it had anything to do with bracing the compression flange during erection that the beam had to be in the top half. Just a SWAG (Scientific Wild Ass Guess)

RE: Shear connection

There is not a requirement that the connection be located in the upper half.  With OSHA connections the angles are frequently offset, so that a row of bolts is not shared.  

For example, in one connection the first line of bolts is 3" from top of steel.  And the connection framing opposite, the first line of bolts is at 6".  With equal depth connections one row is unshared at the top and the opposite is unshared at the bottom.  For a W18 with 12" angle the lower connection would fall primarily below the centerline.  

 

http://www.FerrellEngineering.com

RE: Shear connection

This recommendation (not requirement) is on page 4-12 of the green ASD 9th edition Manual.

RE: Shear connection

If the connection is axially loaded, then additional consideration may be needed, concerning the location of the connection in relation to the centerline.   

http://www.FerrellEngineering.com

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