Dilshan

Plate loads are used to apply pressure load on the plate elements, while floor load can be used to apply pressure load on the area without modeling the plate. When you need to consider the stiffness of the plate element, you can model the plate and assign…

Which version of STAAD.Pro you are using? If you are using any old V8i versions there were a workflow known as interactive steel design. In recent versions that workflow is not there. This workflow has been deprecated. I would request you to use latest…

STAAD TRUSS means all members in the frame are only going to be axial only members with no capacity to carry shear or moments. On the other hand STAAD SPACE would mean that members would be able to carry axial+moment+shear. In a SPACE type frame you can…

Change the first line in the input file from STAAD TRUSS to STAAD SPACE and see if that helps. If not, please illustrate your issue with a screenshot.