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540 | ChapTeR 13 Modeling Floors, Ceilings, and rooFs

Figure 13.1
You can use a single floor
type to show the entire
floor/ceiling sandwich in
early design.

During intermediate phases of design, you can model ceilings so the floor types can include
only the floor and a structural layer, as shown in Figure 13.2. Columns may be created, but more
precise horizontal structural framing may not be modeled yet. The layer within the floor type
represents an assumption of the maximum depth of structural framing.

Figure 13.2
This floor assembly
includes an assumption
for the depth of structural
framing.

In later phases of documentation approaching and including construction, floors should
be modeled as close to actual conditions as possible. You should accommodate detailed finish
conditions for floors as well as coordination with a resolved structural system. Accurate
modeling of these conditions will help support consistent quantity takeoffs and interference
detection. Figure 13.3 illustrates an example of a more accurate floor slab.

c13.indd 540 05-05-2014 16:57:09