topic Re: Displaying stairs in plan properly in Modeling

Displaying stairs in plan properly

Anonymous — Thu, 25 May 2023 14:57:15 GMT

I'm really new to this and need help in getting Archicad to display the plan view properly on a stair meeting a sloping wall. I've attached a simple demo of what I mean. HELP!

Archicad 12AUS, XP

Re: Displaying stairs in plan properly

Anonymous — Sun, 17 Aug 2008 05:19:46 GMT

SEO the stair with the wall. Then save the stair as LibPart. Remove the old stair.

Re: Displaying stairs in plan properly

Anonymous — Mon, 18 Aug 2008 01:17:34 GMT

Couldn't resist - I run into this problem all the time!

Kliment, I agree with your technique, with the following exception...

No need to save the stair separately. Just make the stair wide enough to reach across the stair well's widest point, do the solid element operation and leave it as-is. Just sayin'.

I haven't encountered this particular situation in AC12 yet. On AC9, I'd actually make a slab to use as the cut body, do the SEO, then place the slab on a 'scratch' layer I keep turned off (unless I need to see it for revision). That way, if the skewed wall moves, I can just edit the slab I used and it's up-to-date without any saving or reloading of library parts. This was necessary, of course, because in AC9 I couldn't SEO 'beyond' the back side of the wall. I know they've changed this vertically in AC12 (which is REALLY cool!! used it today!), but not sure if it works 'laterally' (didn't notice / try.. will have to look and see).

My two cents.

Re: Displaying stairs in plan properly

Anonymous — Mon, 18 Aug 2008 01:21:41 GMT

Dag nabbit....

Just noticed in the picture the wall is CANTED. Okay... Use a mesh instead of slab as the cut body. Then the wall's sloped face can be duplicated.

Doh!

That's going to look spacey in real-world... I love it.

Re: Displaying stairs in plan properly

Laszlo Nagy — Mon, 18 Aug 2008 20:30:41 GMT

No matter how you cut the Wall with the Stair in 3D, you will still have to use Lines/Fills to achieve the 2D look of the Stair you are after.
In 2D, SEOs unfortunately to not propagate themselves to the look of the affected elements.

Re: Displaying stairs in plan properly

Anonymous — Tue, 19 Aug 2008 07:47:51 GMT

Thanks Laszlo...I thought I was going mad!
Funny, I tried replacing the treads with slabs and had the same problem in plan view.It must be an issue with sloped elements?

Re: Displaying stairs in plan properly

Laszlo Nagy — Tue, 19 Aug 2008 08:11:35 GMT

It is rather an issue with Solid Element Operations: they have no effect on the 2D of the elements involved so you have to make any resulting changes to the 2D manually.

Re: Displaying stairs in plan properly

Richard Morrison — Tue, 19 Aug 2008 13:40:14 GMT

I haven't tried it yet, but I wonder if the "Show Intersections in 3D" off of the Special Menu might help?

Re: Displaying stairs in plan properly

Laszlo Nagy — Tue, 19 Aug 2008 14:41:14 GMT

Richard wrote:
I haven't tried it yet, but I wonder if the "Show Intersections in 3D" off of the Special Menu might help?

I think that is a different thing, which affects only the 3D Window.
It will show the intersection lines between two intersecting bodies (like we used to construct them in descriptive geometry class in college). But only in 3D, not in 2D.

Re: Displaying stairs in plan properly

Erika Epstein — Tue, 19 Aug 2008 15:43:51 GMT

Use the old Trim to Roof method.
Create a roof to match the slope of the wall. Use trim to roof and TRIM BASE.

When you are done trimming the stairs, you can delete the roof used to trim and the trim holds. The other advantage is that the trimmed stairs will show correctly in 2D and 3D

Re: Displaying stairs in plan properly

Anonymous — Wed, 20 Aug 2008 08:01:24 GMT

Hi Erika...thanks for that. Yep, trim to roof take care of the cut but I guess its manual drafting for the plan view

Re: Displaying stairs in plan properly

Anonymous — Wed, 20 Aug 2008 15:21:08 GMT

Why not make a custom shaped stair using a fill to define the shape, and a line to indicate direction.

- Use a temporary section across the stair to work out where the stair will intersect the sloped wall at the top, then draw the fill to that point on plan.

- Draw the direction line parallel with the walls to keep the treads at right-angles.

- Select the fill and line, then go to Design > 'Create Stair Using Selection' and set up the stair to your liking. Remember to save it to a loaded project folder.

The stairs should now appear correct on plan, section and in 3d. To neaten the section further you could SEO the wall away from the stair but this detail wont effect the overall shape on plan.

Hope that helps.