To Subtract a Body Modifier From a Structural Member

Use this procedure to create a three-dimensional (3D) body modifier and subtract it from a structural member.

You can create a three-dimensional (3D) body modifier from a mass element, a mass group, or any other AEC object with mass. You can also create body modifiers from ACIS solids or blocks that form 3D bodies. You must place the object in the location you want in the drawing before defining the object as a body modifier.

The following illustration shows you how to use a box mass element as a body modifier to cope a beam.

Subtracting a body modifier from a structural member

1. Place the object in the location where you want to subtract the body modifier from the structural member.
2. Select the structural member you want to change with the body modifier.
3. Click Structural Member tabModify panelBody Modifiers drop-downAdd.
4. Select the object to subtract from the structural member.
5. In the Add Body Modifier dialog box, select Subtractive for Operation.
   

6. Enter a description for the body modifier.
7. Select Erase Selected Object(s) if you do not want to keep the original object, or clear this option to keep the object in the drawing.
8. Click OK.