On Land

Environment Information
At Rill Architects we run ArchiCAD on Mac OS X. If you work at Rill, this is your stuff. If you don't, but you work in ArchiCAD, you may find something interesting. Anybody else, I don't know.
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Location: 08b Windows / Vents (A window)

Triangle Gable Vent
Frame thickness refers to the box around the louvers.

Louver parameters: Thickness, Spacing, Angle. The Louver Pen should be thin.

Exterior casing: Typical moulding options, or custom width and thickness.

Interior casing: Same deal.

Either casing can be turned off. The same Casing Reveal is used for both.

Masonry Cut Depth: Same as a window or door. Sill is drawn with the Masonry Sill Pen, though in most cases you would not see this vent in plan.