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Slabs and Roof Slabs
In AutoCAD Architecture, a slab object is a three-dimensional (3D) body that is bounded by
a planar polygon (perimeter) of any shape, and has multiple edges. A slab is defined by its
perimeter, edge conditions, and style. You can use slabs to draw floors and other building
model components that require a flat surface and edge conditions.
Roof slabs are similar to slabs in most respects, but are based on distinct roof slab styles. When
modeling a roof, you can convert individual faces of the roof into roof slabs, which give you
more flexibility in modeling details of the roof’s geometry.
Overview of Slabs and Roof Slabs
Slabs and roof slabs are AutoCAD Architecture objects that you use to model
floors, roof faces, and other flat surfaces where edge conditions need to be
specified. The slab or roof slab object is a three-dimensional (3D) body bounded
by a planar polygon (perimeter) of any shape, and has multiple edges. The object
is defined by its perimeter, edge conditions, and style. Though they share many
of the same properties, slabs and roof slabs represent separate style categories
and tool types. For instance, you cannot apply the properties of a slab tool to
an existing roof slab object.
Roof Slabs
A roof slab models a single face of a roof. Roof slab objects also differ from roof
objects in that each roof slab is a separate entity with no direct connection to
other entities. When you use multiple roof slabs to model an entire roof surface,
you have more flexibility in editing the roof, but the combined topology (3D
geometry) of the roof is not calculated automatically. For this reason, it is
recommended that when you design complex roofs, you start with a roof object.
Then, when the design is substantially complete, but you need more flexibility
for customizing edges and other details, you can convert the roof to individual
roof slabs.
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