Missing Window / Door Parameters

s_p_b — Wed, 03 Jun 2026 22:05:04 GMT

I have noticed some inconsistencies in the window / door parameters available for expressions inside of Properties, compared to those available for interactive schedules. The list below highlights the parameters that appear to be in one set but not the other. In my case I was hoping to be able to use the unit dimensions inside of a series of expressions, to create a property that shows unit width and height for windows, doors, skylights, and curtain walls. I assume these are omissions that should be considered a bug.

A few additional suggestions:

The parameters for W x H should be split into width and height independantly, for consistency with other opening parameters which return a dimension rather than a string - this would allow the current dimension view setting to govern the display units, rather than following project-wide calculation units.

The window, door, or skylight unit width and height should be available independantly, as well as left, right, top, and bottom tolerances, as these are the most critical for ordering windows and coordinating rough opening sizes. These are available by going into the GS Window object sub-type and using gs_tolerance_left/right/lower/upper, however library part parameters are unavailable in property expressions, which are useful to produce unified schedules of exterior openings covering windows, doors and skylights.

Lastly, the "Nominal W x H Size" and "Nominal W x H x T Size" parameters currently return strings with a unicode multiplication sign as delimiter: × [U+00D7 : MULTIPLICATION SIGN]. However, the SPLIT text functions do not return the expected parts, which I would file as a bug.

Operating system used: Mac Apple Silicon 15.7.2

topic Missing Window / Door Parameters in Project data & BIM

Missing Window / Door Parameters