Autodesk 00128-051462-9310 User Guide - Page 1382

slab and affect only components that they touch, body modifiers can be used to add to, subtract from, or completely replace a specific component. If a slab/roof slab has only one component, then the body modifier applies to the entire slab/roof slab. You can create a 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. 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 slab/roof slab. NOTE Objects used as interference conditions are not included for the Area in the LIST command or in a Schedule Query result. To create a body modifier for a slab or roof slab: 1 Create one or more objects in the location where you want the body modifier positioned in relation to the slab/roof slab. 2 Select to slab/roof slab you want to modify, right-click, and click Body Modifiers ➤ Add. 3 Select the objects to be applied as body modifiers, and press ENTER. 4 On the Add Body Modifier worksheet, specify the following: ■ For Slab Component (or Roof Slab Component), select the component to which you want the body modifier applied. ■ For Operation, select Additive, Subtractive, or Replace, depending on whether you want the body modifier added to the selected component, subtracted from it, or used to replace the entire component. ■ For Description, enter a text description of the body modifier(s) you are applying. 5 If you do not want the outline of the object(s) to be visible in the drawing, select Erase Selected Object(s). 6 Click OK. Editing a Slab/Roof Slab Body Modifier in Place Use this procedure to edit the shape of a body modifier that is attached to a slab or a roof slab. You can edit the body using grips to edit faces, using Boolean commands to add or remove other objects from the body modifier, and other editing commands to change its shape. 1 Select the slab or roof slab that has the body modifier you want to change, right-click, and click Body Modifiers ➤ Edit In Place. A temporary mass element is created for you to edit the geometry of the body modifier. If the slab/roof slab contains multiple body modifiers, a mass element is created for each body modifier. If an object was not originally a mass element (for example, if you used a structural member as a body modifier), the object becomes a temporary Free Form mass element with faces that you can edit. 1342 | Chapter 28 Slabs and Roof Slabs