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Adding a Hole to a Slab/Roof Slab
Use this procedure to add a hole to a slab or roof slab. The hole adds new
vertices and edges, which you can edit as you do other slab or roof slab vertices
and edges.
You can use polylines or three-dimensional (3D) objects, such as walls and
mass elements, to create the hole.
â– Holes generated by a closed polyline are projected from the polyline to
the slab or roof slab, using the current user coordinate system (UCS).
â– 3D objects must intersect the slab or roof slab without any projection.
If the objects contain an interior void, you are prompted to use the inside or
outside surface to create the hole. For example, if you create a chimney using
four wall objects, you can cut the hole at the inside or outside of the chimney.
The new hole faces are aligned with the surfaces of the cutting bodies, and
are not necessarily parallel to each other.
The smoothness (tessellation) of curved edges is controlled by 2 AEC display
resolution settings called Facet Deviation and Facet Maximum. Beginning
with Autodesk Architectural Desktop 2007, you can adjust these settings after
the slab or roof slab is created. Also, the individual segments or facets making
up a curved edge are no longer treated as separate edges; each arc on the
perimeter of a slab or roof slab is treated as a single edge. For more information,
see Specifying the Display Resolution of Objects with Facets on page 208.
2438 | Chapter 30 Slabs and Roof Slabs
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