STAAD.Pro Help

Solid Loads tab

Used to apply uniform pressure and uniformly varying pressure on the faces of the solid element.

Face Number Select the face on which we want to apply the load.
Node 1…. Node 4 Specify the pressure at each node on the selected face of the solid element. For example, if the pressure is uniform, the same value ought to be entered in all four columns.
Direction Specify the direction of design pressure as Local Z axis or global axes (GX, GY or GZ) and click on Add. By doing this, the solid pressure load is added to that particular load case.