Slabs are the basic horizontal building blocks in ARCHICAD. They are typically used for modeling floors, split levels or ceilings.

Attributes for each part of the Slab’s representation are set in the Slab Settings dialog box.

Like other construction elements, a Slab’s essential structure derives from its Building Material.

Note: The Floor Plan outlines of Meshes and Slabs on remote stories (if they are shown on stories other than their home stories) are displayed using the line type set at Project Preferences > Legacy.

While a Slab’s surface is defined as part of its Building Material, you can override each of the three Slab surfaces (top, bottom and side) surfaces in the Model Panel of Slab Settings.

It is also possible to assign a separate surface and a separate edge angle to each edge of the Slab.

To aid in precise element placement, each Slab has a Reference Plane that helps you control connections to other elements.

The Gravity function also works for Slabs: turn on the Gravitate to Slab command as an aid in placing elements onto the surface of the Slab.

Related topics:

Slab Reference Plane

Creating Slabs

Placing Holes in Slabs

Set Custom Slab Edge Angle and Edge Surface

Slab Tool Settings

Adjust Elements to Slabs


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Slab Reference Plane

Each Slab has a reference plane which plays a role in intersections with other elements. The ability to flexibly assign a Slab reference plane ...

Creating Slabs

Set Slab parameters in Slab Settings. See Slab Tool Settings. New Slabs can be created in either the Floor Plan or the 3D Window. Depending ...

Placing Holes in Slabs

You may need to make holes in Slabs to accommodate objects such as staircases, or for an open atrium space. 1.Select the existing Slab. ...