STAAD.Pro Help

D. Slabs table

Contains the slabs already defined along with the associated design load envelope.

Opens when the Slab Design page is selected in the Advanced Slab Design workflow.

Slab no Lists sequential slab reference numbers (S1, S2, etc.)
Slab Name Name of the Slab definition.
Envelope name The load envelope associated with the slab.
New Slab Opens the Slab Definition dialog, which is used to create a slab definition from a set of selected plate elements.
Edit Slab Opens the Slab Definition dialog to edit or rename the currently selected slab.