Beta (Inputs.IFC)BetaOptionalmaterial: stringOptionalthickness: numberOptionalname: stringOptional BetamaterialThe name of the layer's material, added before with materials.add. Leave it out for a layer
without one.
Optional BetathicknessHow thick the layer is, across the wall or down through the slab. Left out, 100 mm, in the model's length unit.
Optional BetanameThe layer's own name, such as Insulation.
One layer of a layer set: its material, by name, and its thickness. Used by
materials.addLayerSet.