Autodesk 24108-051400-9000 - AutoCAD Revit Architecture Suite 2008 User Manual page 1454

Trimming a structural member with a trim plane
Adding a Trim Plane to a Structural Member
You can add any number of trim planes to a structural member. When you add a trim plane to one or more structural
members, you define the position of the trim plane relative to the structural member that you are trimming.
When defining trim planes, you can:
Define the position of the trim plane relative to the start or end of the extruded axis of the member.
Offset the trim plane in the X direction to move the origin of the trim plane along the extruded axis of the member.
1414 | Chapter 29 Structural Members