topic Re: Missing Window / Door Parameters in Project data & BIM

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

Re: Missing Window / Door Parameters

Graeme — Wed, 12 Aug 2026 11:22:30 GMT

I'm having the same issue where I want to display the Structural Opening sizes as well as the Door/Window Frame sizes.

I created a width property and a height property, it works but only if you have one instance of the Door or Window inserted into the Model. If you have a more than one in ArchiCAD's schedule it adds the the height or the width together to give you a total for all the same type of window or door.

So in my case I have four of Window Type W-02 which is 580mm wide by 2850mm high, what it displays in the Schedule for the width is 2320mm and for the Height 11400mm.

I can't find a way to stop ArchiCAD adding up. I'm now going to try drilling down into the GDL and see if I can use a parameter there that gives me the Frame height and width....

Re: Missing Window / Door Parameters

Graeme — Wed, 12 Aug 2026 11:35:49 GMT

The GDL route worked.

There is a parameter in the Window 27 object called 'ac_unit_width' and 'ac_unit_height'. I added both to my Schedule and it works, no need to mess about with Properties.

Good old GDL 🙂

Re: Missing Window / Door Parameters

Laszlo Nagy — Wed, 12 Aug 2026 18:09:34 GMT

@Graeme wrote:

I created a width property and a height property, it works but only if you have one instance of the Door or Window inserted into the Model. If you have a more than one in ArchiCAD's schedule it adds the the height or the width together to give you a total for all the same type of window or door.

So in my case I have four of Window Type W-02 which is 580mm wide by 2850mm high, what it displays in the Schedule for the width is 2320mm and for the Height 11400mm.

It depends on the Data Type specified for the Property.

If the Data Type is "Length", it will add it up in the schedule.

If the Data Type is "Number", it will not add it up.

You can convert a "Length" Data Type to a "Number" Data Type by dividing it by 1 meter.

The division by 1 meter would look something like this in the Expression Editor:

Length / 1 m