Editing Slab Geometry with 3D Modifiers

A slab can be modified by a 3D shape, such as an extrude, tapered extrude, extrude along path, sweep, solid, or closed mesh. These modifications allow a slab to have a ramp, add support beams, or include drainage features. The boundaries of the modifier can be specifically defined according to its shape, or they can simply be defined by the slab boundary.

Create a solid section from a grade object as described in Creating a Solid Section from Grade Objects, and use the resulting sloping solid as a 3D modifier.

Adding a 3D Object to a Slab

To add a 3D object to a slab:

1. Select both the slab and the 3D modifier.

2. Select the command.

The Add 3D Object to Slab dialog box opens.

Click to show/hide the parameters.

Subtracting a 3D Object from a Slab

To subtract a 3D object from a slab:

1. Select both the slab and the 3D modifier.

2. Select the command.

The 3D geometry is subtracted from every component that it overlaps.

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Changing the Slab Modifier

Editing Slab Geometry with 2D Modifiers

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