Often the exact shortening value is unknown. In this case, place a coordinate system with the x/y plane in the sectional plane (often at an existing object) and the selected beam end can be cut and shortened by this plane. A shorten processing object is created into the same layer as the beam. By setting a positive shorten value the beam is trimmed whereas by setting a negative shorten value the beam is extended.
Shortening at the UCS is ideal for adjusting curved beams.
Note: The selected beam end is cut even if the coordinate system is at the other end.
To access the command
Features tool palette: 
Command line: _AstM4CrBeamShortUCS
To create a beam shortening according to UCS
- Select a suitable UCS.
-
Features
tool palette: Click .
- Select a beam at a reference end.
- The beam is shortened.
The properties dialog box appears where you can modify the properties.