I am looking at the requirements of the beam at the second story of the chevron BRBF. Why is RAM Frame checking Beam ductility using the Diagonal Brace requirements of AISC 341-16? The output clearly says it does not check the axial demand in the beam, therefore, it should have a h/tw or 59.42 requirement. I am frustrated that this output does not clarify what additional checks need to be done as well. Per AISC 341-16 Table 1-3, the beam I design (W24x62) meets ductility requirements, yet in RAM Frame it pushes my beam size up to W24x131 before it meets the wrong ductility requirement.
It's not that we are assuming no axial force, it's that we just are not calculating Ca for beams. But I take your point. We are taking the conservative assumption from D1.1. I'll check with the developers to see if they have any bright ideas for how to do it more accurately allowing for any configuration of braces and diaphragm types.