effective length for x-braces

huangyhg

effective length for x-braces
what are most designers using for effective brace lengths for steel x-bracing (cbf)?  the telecommunications industry tia/eia has reduction values base upon asce 10-97 "design of latticed steel transmission structures", but what does aisc or ibc say about this issue?
tia
check out our whitepaper library.
they don't say. it's common to do what the tower people do.
dbd
asce 10 on p58 example 7 says that you can consider the cross over point as a brace point if the tension member has 20% of the force in the compression member, so it is load case dependent if you can count on the tension member as a brace point.  otherwise the out of plane buckling is the entire member length.
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