Slab

In one sentence: Create a horizontal floor or ceiling slab by extruding a planar shape by the slab thickness.

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Overview

Workbench: BIM
Menu: 3D/BIM → Slab
Command: BIM_Slab
IFC class: IfcSlab

Creates a horizontal floor or ceiling slab from a planar shape (face or closed wire). The shape is offset vertically by the slab thickness, producing a solid element.

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Key properties

Property	Description
Thickness	Slab thickness (mm)
Normal	Direction of thickness growth (default: vertical, upward)

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When to use it

• Concrete floor slabs between storeys.
• Roof slabs and flat roofs.
• Foundation slabs.

When NOT to use it

• Pitched roofs — use Roof for sloped roof surfaces.
• Thin cladding panels — use Panel instead.

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See also

• Column — vertical structural support
• Beam — horizontal structural beam
• Roof — sloped roof surface
• BIM Workbench — workbench overview