Wind loads can be automatically are generated in RISA-3D for building models. RISA calculates the ASCE 7 Main Wind-Force Resisting System loads and calculations are based on the Analytical Procedure for Enclosed Rigid Building for All Heights.

Rigid Diaphragms can be added using the Diaphragm spreadsheet. Just enter the node label and then choose the horizontal plane.

Aside from the topic of Plate Connectivity, the concept of plate meshing is important. The concept behind finite element analysis is that you represent a structure using a finite number of elements (plates).

Modeling T-beams and L-beams in RISA-3D can easily be done by specifying the flanges after drawing in the rectangular concrete beam.

Applying wind loads to structures with rigid diaphragms can be done automatically in RISA-3D. In the image below we have a structure that has rigid diaphragms and the wind load has already been applied at each diaphragm level.