Beam over column connection

[Veer007]

Hey guys, do you ever encounter this situation, stiffener plate need to be kept 1" below from bottom of top flange of the beam, please let me know behind the reason.

Thanks in advance!!

 

[JoshPlumSE]

The stiffener is there to prevent local flange bending or web buckling at the point of concentrated load (i.e. across from the column flanges).

But, the gap is there just for easier fabrication. It's a pain in the neck to fabricate a stiffener perfectly for the depth between flanges, and trimming it back for the fillet and such. Plus, it's not needed on the top end.

 

[Veer007]

Thank you
Thanks in advance!!

 

[Lomarandil]

Also a better detail for fatigue loading, if I remember correctly.

----
just call me Lo.

 

[Veer007]

is this for beam bending allowance where static point load acting on a member?

Thanks in advance!!

 

[human909]

Also a better detail for fatigue loading, if I remember correctly.

This is a snippet I picked up from the discussion and reports on San Francisco Transit Center failure. The tensile stresses in the top flange can be sensitive to crack propogation if you weld the stiffener to the flange.

 

[Veer007]

thank you

..

Thanks in advance!!