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Double angles with y-axis bending

Double angles with y-axis bending

Double angles with y-axis bending

(OP)
I have a case where double angles are used as compression members (braces). However, they are picking up some wind loads causing bending about the y-axis. AISC doesn't specifically address this situation if Chapter "F". Any suggestions

RE: Double angles with y-axis bending

Can you check bending for one angle of the pair?  

RE: Double angles with y-axis bending

Then double your strength or half your loading??

RE: Double angles with y-axis bending

There is some commentary in the code about this.  Essentially, the recommendtaion is to use the weak axis provisions for wide flanges and channels as a guide.  

This basically means using Mp or 1.6*My as the nominal capacity.   

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