6.11.5 Opening Shade

This data structure describes the dimensions and position of external shading devices such as overhangs, side fins, or louvers that shade the opening. Overhangs are commonly specified in terms of the projection distance, height above the opening, and extension distance on each side of the opening. Side fins may be described in a similar manner. Any geometric construct is acceptable as long as it accounts for the physical and geometric relationship between the opening and the objects around it that provide shading.