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Bolt Groups - Vertical AND Horizontal Tension

Bolt Groups - Vertical AND Horizontal Tension

AISC has those handy tables for bolt groups loaded in shear with the load occuring eccentrically to the group, causing bolt rotational reactions (Instantaneous center and Elastic methods).

Suppose you have a perimeter steel beam which serves not only as a gravity beam but also as a lateral brace collector, taking axial load down its length.

I've searched through the AISC specification and the manual and cannot find a design example of this condition for the connecting plate design.

The bolts simply take a resultant shear at an angle and the tables deal OK with the bolts.  

But with the connecting plate it appears that the specification is silent unless I'm just not seeing it.  They have the bolt bearing checks (not a problem) but the shear yielding and shear/tension rupture checks don't indicate what to do with shear in two directions.


RE: Bolt Groups - Vertical AND Horizontal Tension

Including the AISC Seismic Design Manual?

Mike McCann
MMC Engineering


RE: Bolt Groups - Vertical AND Horizontal Tension

The Seismic Design Manual has an example of this, a shear tab loaded with both shear and axial force.  

RE: Bolt Groups - Vertical AND Horizontal Tension

I have commented before on the design of extended plates with shear and axial load, and the necessary considerations.  I don't know how to find the previous threads.  But, the responses were extensive.

RE: Bolt Groups - Vertical AND Horizontal Tension

Thanks for the replies - nutte - I'll check out the seismic manual.


RE: Bolt Groups - Vertical AND Horizontal Tension

If the Seismic Design Manual does not answer your questions, Steel Tips has "Design of Shear Tab Connections for Gravity and Seismic Loads."

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