Shortens or lengthens structural members to meet a plane.
Access Methods
Ribbon: Structure tab 
Cutting panel Trim Member
Command entry:
plantsteeltrim
List of Prompts
The following prompts are displayed.
- Select structural member to trim or shift-select to extend or [Undo]:
-
Click the structural member to trim. Shift-select extends the selected objects rather than trimming them.
Note: To switch to plantsteelextend, hold down SHIFT and click the member you want to extend.