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Roofs and Slabs
Roof slab styles can contain more than one component, similar to wall styles;
many of the conventions are therefore the same or similar. Roof slabs can also
use roof slab edge styles.
Roof Slab Styles
Naming Convention:
Roof slab styles, like wall styles, include multiple components. The name
should indicate the structure of the roof and the dimensions of the major
components (minor components such as roofing felt can have the dimension
omitted). The first component listed should be the major structural component.
The last component should be the finish component (if any):
<Component name>-<Size in decimal units> + <Component name>-<Size in decimal
units>...
Example Roof Slab Style Names:
Example NameRoof Slab Style Definition
Rafter-7.25 + ShinglesRoof Structure: 2x8 Rafter, roofing felt, as-
phalt shingles.
Best Practices for Roof Slab Styles:
â– Materials should be assigned to all roof slab components.
â– Roof slabs should be defined with the baseline at the bottom of the major
structural component.
â– The index order of roof slab components should be indexed from top to
bottom, with the top component having index 1.
â– Thicknesses of components should always be positive. The thickness offset
from the baseline should always be to the bottom edge of the component.
â– You should consider classifying all roof slab styles to allow for more display
control options.
Roof Slab Edge Styles
Roof slab edge styles are fairly simple and can contain a maximum of only
two components: the fascia and the soffit. Unlike wall endcaps, roof slab edge
Architectural Objects | 949
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