Again, the GTSTRUDL CASE Center technical support team can show you several ways in which such graphic manipulation can be performed. It is, in fact, very easy. I do that frequently.
The answer invloves more than can be reasonably discussed in this reply. Contact the GTSTRUDL CASE Center support. They have experts that can provide a complete response to your questions.
1. Be very careful, "P-Delta" analysis usually refers to ONLY one part of the correct nonlinear analysis of structures (i.e., the influence of a structure's joint displacements on the force/moment equilibrium equations). However, what many programs do not consider are the other very...
What??? This is incorrect. Design procedures that make assumptions of "effective" slab width for simplified analysis and design of composite behavior are NOT procedures for calculating loads on a structure. Not surprisingly, STAAD is wrong.......again.
meca: No, not in production, but yes to compare its solutions with other programs. Results? Solutions often different than those produced by very high quality structural software.