Contour Lines

The contours, holes and bounding rectangle were drawn on different layers over a jpg of the plan and moved to the correct elevations.

Holes in plan were drawn with the control point curve.

Patch was used to drape a surface over the contours, this was then trimmed with the rectangle before being copied to form the roof.

Make hole was used twice to cut both surfaces before the hole extrusions were exploded, trimmed and deleted.