The Assign commands are used to make assignments to concrete beams in a model. Assign commands can be issued in Single, Fence or All mode. Making an assignment to a beam will invalidate the design results for the entire beam line, requiring the beam line to be redesigned.

When a command is issued in Single mode, the arrow cursor turns into a target cursor for the selection of the desired member. In Fence mode, the arrow cursor turns into the rectangle cursor that allows the selection of multiple members at a time. In All mode, the cursor remains the arrow cursor but the assignment is made to all members.