topic Re: Opening behaving badly.. in Modeling

Opening behaving badly..

Graeme — Mon, 18 May 2026 11:25:27 GMT

I've used the Opening tool to add holes for ductwork through my partitions. What is weird is that a lot of these Openings are behaving badly or weirdly as their width and height are swapped around and I can't find a reason why.

The screenshots show two openings one behaving correctly and the other with the weird behaviour namely when you enter the width the height changes and same if you enter the height the width changes.

Re: Opening behaving badly..

Graeme — Mon, 18 May 2026 14:11:17 GMT

Hmm may have found what is doing it. When I use the "Create Openings" palette the ressulting opening has the flipped width and height. Whereas when I just use the syringe tool and then place an Opening manually it works fine.

Would be nice if anyone else in AC28 gets the same result.

Re: Opening behaving badly..

marcoariveross — Mon, 18 May 2026 15:14:21 GMT

Hi
If you look closely, there's no such error.
Your elements are rotated. If you place an opening in two elements with different orientations in plan and/or 3D, you'll obviously see a different graphical representation. The dimensions are based on the element's plane, not on the view from a higher plane.

Re: Opening behaving badly..

Graeme — Tue, 19 May 2026 08:07:24 GMT

Sorry I disagree, you can see in the screenshots below the objects measure 226mm in Plan whereas the preview of the misbehaving objects says it is 112mm. Also in the schedule I have made it gets it wrong too. It shows the length as the height and visa versa yet in 3d and 2d Plan view they are the correct width and height.

Re: Opening behaving badly..

Turit — Tue, 19 May 2026 08:43:13 GMT

The opening can be rotated manually. Once rotated, it will not rotate back even after the properties are transferred.

Re: Opening behaving badly..

Graeme — Tue, 19 May 2026 14:40:21 GMT

Thanks for the video.

To me that is a problem particularly if using fuse link dampers which need to be installed so gravity helps them operate.

If you create a schedule to which the Buyer purchases the dampers based on ArchiCAD's schedule where the width and height have got messed up as you show then the Damper will be ordered with the wrong orientation.

Re: Opening behaving badly..

Mahmoud Qenawi — Tue, 19 May 2026 15:05:28 GMT

You're right, even beams have the same attitude when rotating.

Better, we should adjust their size numerically or graphically without using the rotating feature.

Don't know if it's a bug or not but thanks for informing us.

Re: Opening behaving badly..

Lingwisyer — Wed, 20 May 2026 04:10:36 GMT

Unlike the Opening Tool, the Beam Tool has a rotation angle that you can reference. The Opening Tool on the other hand freely rotates and changes to polygonal without any reflection in the settings.

Ling.

Re: Opening behaving badly..

Turit — Wed, 20 May 2026 13:42:27 GMT

I made a simple program with tapir that checks whether the physical dimensions and width are different. It works for walls located at X-Y coordinates.

Re: Opening behaving badly..

Mahmoud Qenawi — Wed, 20 May 2026 13:56:16 GMT

Thanks @Turit , will try it sure.

Re: Opening behaving badly..

Patrick M — Wed, 20 May 2026 15:16:49 GMT

but from the OP's screen shots, it does not appear their openings are polygonal; both are indicated as rectangular. It seems the schedule fields for width/height are reversed.
...
I do wonder if the headings of the schedules have been edited? It's so unlike archicad to have a glaring default, bug, or error like this! <sarcasm>