- Start Autodesk Inventor Nastran.
- From Open, navigate to the C:\Users\Public\Public Documents\Autodesk\Inventor Nastran 2025\Tutorial\en-us\Inventor 2025 folder and open trailer frame a.ipt.
- Click File, Save As and save the part as Beams Trailer Frame a.ipt. This allows you to reuse the original part.
- Click
- Go to . Set the units to inch and lbmass (pound). They will become the Default units.
- Or, double-click
Units in the tree and select a
Unit System with units set to inches and pounds.
- Click OK.