In recent versions of the software, there has been a change in the way the design is carried out for strength and serviceability as per the AISC 360 code. It requires definition of strength and serviceability load envelopes. The following wiki outlines…

The purpose of DIRECT ANALYSIS is to compute the member forces for strength design. For computing drifts, deflections you should use a PDELTA 15 ANALYSIS with the un-reduced stiffness and not a DIRECT ANALYSIS. Both analysis commands could be part of…

To begin with, the design commands that I specified are generic and can be used for any code for example CODE AISC UNIFIED 2010 METHOD ASD ( or LRFD ) would use the ASD or LRFD design as per AISC 360-10. CODE AISC UNFIED 2005 METHOD ASD ( or…