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 Add 3D Object To Slab command from the appropriate menu:

●    Architect workspace: AEC > Add 3D Object To Slab

●    Landmark workspace: Landmark > Architectural > Add 3D Object To Slab

●    Spotlight workspace: Spotlight > Architectural > Add 3D Object To Slab

The Add 3D Object to Slab dialog box opens.

Click to show/hide the parameters.

Parameter	Description
Add object to component	Select the component to be modified by the addition; all of the other components are clipped by the modifier
Clip object to component boundary	Trims the 3D object to the bounds of the selected component; this is useful for creating a sloping slab

3. Click OK.

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 Subtract 3D Object From Slab.

●    Architect workspace: AEC > Subtract 3D Object From Slab

●    Landmark workspace: Landmark > Architectural > Subtract 3D Object From Slab

●    Spotlight workspace: Spotlight > Architectural > Subtract 3D Object From Slab

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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