We are currently modeling a tall steel plate girder, about 104". We have lateral bracing in the exterior bays for wind load during construction. When we look at the cross-frame forces in the analysis function, the maximum load in our lateral bracing for Strength III is 96.9 kips. However, when we do the cross-frame design check, that same bracing does not have the controlling load and actually shows no compression or tension axial force. We are doing the finite element option, this isn't making sense to us. We had an independent check with STAAD and there is a much higher resultant force there. What is the program doing for the checks?
Bug 1090276 has been filed and the issue has been fixed and will be available in the future version of leap bridge steel.