topic Re: Railings and Stairs in AC21 in Modeling

Railings and Stairs in AC21

terzer — Tue, 23 May 2023 16:05:43 GMT

Hello,
today I downloaded the new Archicad 21. It works great, but I have few questions:
In the video "Modeling the Stairs on Robson Square – Classics Remodeled in ARCHICAD" we can see the new stair tool being used to create ramps. I can't find how to do this.

My second question is how to create profiled rail.

I spent two hours just looking for those things (which ignited my interest in AC21 in the first place)
Thanks!

Re: Railings and Stairs in AC21

Anonymous — Wed, 14 Jun 2017 22:34:45 GMT

I dont have AC21 yet, but my understanding is that ramps cannot be made with the new stair tool, you would use roof slabs as with previous versions.
The handrail can still be used in conjunction with those & be associated to them.

Re: Railings and Stairs in AC21

Marky — Thu, 15 Jun 2017 14:20:20 GMT

terzer wrote:
Hello,
today I downloaded the new Archicad 21...

Where on Earth did you download it from?

Re: Railings and Stairs in AC21

terzer — Thu, 15 Jun 2017 15:50:55 GMT

Marky wrote:
terzer wrote:
Hello,
today I downloaded the new Archicad 21...
Where on Earth did you download it from?

From the official Graphicsoft website, in the download section.

In the video I mentioned the ramp is made with a specific tool, it is not a roof "ramp", that's why I'm asking.

Re: Railings and Stairs in AC21

sinceV6 — Thu, 15 Jun 2017 20:22:10 GMT

terzer wrote:
Marky wrote:
terzer wrote:
Hello,
today I downloaded the new Archicad 21...
Where on Earth did you download it from?
From the official Graphicsoft website, in the download section.

In the video I mentioned the ramp is made with a specific tool, it is not a roof "ramp", that's why I'm asking.

To me it looks like the ramp object, created with the Rotated geometry method. These videos don't show the behind the scenes where favorites are stored prior to making the video or when parameters are changed, to display more of the final steps in less time.

Anyhow... I wonder if it is possible to remove the riser/thread part of the stairs to create ramps... Still wouldn't know if I would use the stair tool to create them: being GDL objects/subobjects, I don't know if they'll connect properly to other complex structures as "roof ramps" can.

Best regards.

Re: Railings and Stairs in AC21

Anonymous — Thu, 15 Jun 2017 23:02:07 GMT

I did ask the question shortly after they announced the release & was told by those in the know no.

But as long as I can use the handrail tool with the roof objects & that they are associative that's all good.

Re: Railings and Stairs in AC21

sinceV6 — Thu, 15 Jun 2017 23:33:38 GMT

Well... That being the case, I think it's odd they didn't include the option (or remove the riser/threads to make it happen) to create ramps with the stair tool, given that the old tool allowed you to make'em. Level associativity would've been great for ramps.

Best regards.

Re: Railings and Stairs in AC21

terzer — Fri, 16 Jun 2017 09:31:14 GMT

Even with the new rail tool, using custom profile, it's super easy to create sloped ramps, roads with custom curbs, profiles. The ramp objects are too restrictive and customisable.
The technology is there, it can be done, but with the wrong tools.

Re: Railings and Stairs in AC21

Laszlo Nagy — Fri, 16 Jun 2017 12:35:27 GMT

It is possible to do Ramps using the Stair Tool but you need to get kind of creative.

In the Finish page of the Stair Settings Dialog it is possible to turn off Finishes (both Treads and Riser) altogether.

Then, you can use the Beam option for both Flight Structure and Landing Structure.
Then you can define the desired thickness for your Ramp, for example 150 mm thick, 1200 mm wide.

Then you can place the Stair with no Finishes and only a very wide Beam Structure, and you will have a Ramp.

Re: Railings and Stairs in AC21

Laszlo Nagy — Fri, 16 Jun 2017 12:39:27 GMT

Marky wrote:
terzer wrote:
Hello,
today I downloaded the new Archicad 21...
Where on Earth did you download it from?

From here:

http://www.graphisoft.com/downloads/

Re: Railings and Stairs in AC21

terzer — Fri, 16 Jun 2017 17:39:59 GMT

That's it!!
Thank you!

Re: Railings and Stairs in AC21

Anonymous — Sun, 02 Jul 2017 09:02:28 GMT

Hi, I tried to create ramps with Lazlo's instructions and use on mesh.
Stair does not gravitate on anything even on mesh. Rail does and produces nice ramps following mesh.

Stairs when we draw in 3D they work like having the height or the riser value locked. So you cannot click between two arbitrary points and get a stair structure that is based only on length and differnce in height, taking in cosiderations only the maximum riser limit, thus giving us the abiltity to create landscaping stairs were sometimes have long treads, sometimes enen slightly inclined.

Re: Railings and Stairs in AC21

Barry Kelly — Mon, 03 Jul 2017 01:07:32 GMT

You can untick the rules (in the stair settings) that control how the stair will be constructed.
You can also turn off the lock for the tread (going) depth so it is flexible.

Barry.

Re: Railings and Stairs in AC21

Anonymous — Mon, 03 Jul 2017 07:19:47 GMT

Hi Barry,

I did try all these, it is nor that flexible, it locks the riser height thus resulting in certain inclination, does not play with the range of riser. Maybe the problem is in RC1 release, still haven't got my upgrade.

And by the way, I was thinking that this should be implemented for the concrete stair structure. Also to control if the difference in height is very small and the length of tread large, to turn to ramp for that segment.

Regards

Re: Railings and Stairs in AC21

Barry Kelly — Mon, 03 Jul 2017 07:46:01 GMT

I re-read your post and I think the problem is that you can't specify the height as you place the stair (I may be wrong).
As far as I can see you have to know the exact height or link it to a storey height before placing the stair.
Of course it can be adjusted afterwards by simply typing the correct height in (I can't see any way of dragging it in 3D).
As I say I may be wrong - I will have to watch through the movies again.

Barry.

Railings and Stairs in AC21

Anonymous — Mon, 03 Jul 2017 13:33:10 GMT

Hello,

Playing around with the new rail tool I ended up in this profiled rail tool cut design (it’s a non-closed square, in witch and as we understand, plan angles are at 90º) (see fist sketch plz.).

Changing the heights of the proposed, I constantly (even if associated or not to meshes and so on…and on) ended up as in the second skecth demonstrates.

The profile used is a simple rectangle and the resulting rail is subtracted from several components (handrail, etc.). Balusters and panels are set to invisible.

The exercise was made using handrail or a top rail and, as you can see,
the resulting cut geometry is not correct (does not stand vertical)

So my question is:
I’m I doing something wrong or is it a bug?

Thanks, in advance!

Re: Railings and Stairs in AC21

Anonymous — Mon, 03 Jul 2017 18:25:52 GMT

@ruy,
If you are asking if the section should show your profile exactly as you designed it no, it shouldn't look as you designed it if the profile is inclined.
The profile is perpendicular to the extrusion line.

Exploring your example and idea of trench came to me. Looks promising.

Railings and Stairs in AC21

Anonymous — Tue, 04 Jul 2017 10:42:52 GMT

Sir ispyridis :

Thank you for your interest on this matter, and...

Yep!
….well done, that’s the inherited potential of this new tool.

Regarding my previous post and as we can see, forcing 90º between transitions of the profiled rail tool (with different heights) leads to strange resulting geometry.

Re: Railings and Stairs in AC21

Anonymous — Tue, 04 Jul 2017 15:16:24 GMT

In my example I use the rail not toprail nor handrail. no gosenecks nothing. and you can see all nodes are very clear even with a quite complex profile.
the nodes are at right angles on plan but at different altitudes.

Re: Railings and Stairs in AC21

Laszlo Nagy — Thu, 06 Jul 2017 13:26:50 GMT

ispyridis wrote:
Hi Barry,

I did try all these, it is nor that flexible, it locks the riser height thus resulting in certain inclination, does not play with the range of riser. Maybe the problem is in RC1 release, still haven't got my upgrade.

And by the way, I was thinking that this should be implemented for the concrete stair structure. Also to control if the difference in height is very small and the length of tread large, to turn to ramp for that segment.

Regards

A single Stair's Risers Height and Going Depth is always the same when it is placed. In Edit Mode it is possible to move all Risers to some other position (please note that this will not modify the Structure), and it is also possible to select any Tread and modify the tread Height individually.

However, what I would do is I would probably model such a Stair using multiple Stair elements.

By the way, a Stair is not associated to a Mesh and Gravity is not available as an option when placing Stairs.