Room finish, only calculate floors at slabs below

When Calculate floors only at slabs below is off (default setting), Allplan calculates finish floor surfaces based on the full extent of the room even when only parts of the slab are below the room. In addition, only openings created with Recess, Opening in Slab are subtracted.

If, however, the slab is only partially below the room or if openings were created in a different manner (using Reshape Surface Element, Architectural Area, for example), select the Calculate floors only at slabs below option to ensure that floors are calculated correctly based on the slab size.