Autodesk 00128-051462-9310 - AUTOCAD 2008 COMM UPG FRM 2005 DVD, User Manual

Page: 1246 / 2268

After you create a body modifier from an object, you can delete the original object. However, if you have created a
complex object, such as a mass group comprising many mass elements, you may want to retain the object in the drawing
until you are sure you have the results you want for the stair.
Adding a Body Modifier to a Stair Component
Use this procedure to create a body modifier and add it to a stair.
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 mass element as a body modifier to add to a stair stringer component.
Adding a body modifier to a stair component
1 Place the object in the location where you want to add the body modifier to the stair.
2 Select the stair you want to change with the body modifier, right-click, and click Body Modifiers
➤
Add.
3 Select the object to add to the stair component.
4 In the Add Body Modifier dialog box, select Stringer for Stair Component and Additive for Operation.
5 Enter a description for the body modifier.
6 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.
7 Click OK.
Subtracting a Body Modifier from a Stair Component
Use this procedure to create a body modifier and subtract it from a stair component.
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 mass element as a body modifier to subtract from a stair tread
component.
1206 | Chapter 25 Stairs