Connections

[EmpiricalEngineer]

Curious what others would say about a connection like this. In the image shown you have a post with a brace going behind. Mounted on the post is an angle piece that attaches to the post with 2 bolts and to the brace with another two bolts at its web and flange. The force is axial down the brace. Would you say the connection has a 4 bolt capacity or a 2 bolt capacity?

 

[SWComposites]

2

 

[desertfox]

Agreed 2 bolt capacity because either pair can fail independently.

“Do not worry about your problems with mathematics, I assure you mine are far greater.” Albert Einstein

 

[milkshakelake]

Definitely 2.

 

[driftLimiter]

What exactly does 2 bolt or 4 bolt capacity mean? Bolt Tension? Bolt Shear? What about the angle clip itself is that not part of the connection capacity??

You have two shear planes here that forces must transfer across. Each one of them has 2 bolts in shear.

You aught to consider a free body diagram or some other means of visualizing and accounting for the forces in the bolts and throughout the body of the connection.

There are eccentricities in this connection that will increase the force in bolts beyond what a simple shear check would suggest.

The bolts into the post have a downward shear, a twisting shear, and a T/C couple that all should be considered.