topic level for bottom surface of slab (for false ceiling purpose) in Documentation

level for bottom surface of slab (for false ceiling purpose)

alemanda — Mon, 30 Dec 2024 15:58:18 GMT

Hi all,
is there any way using the level tool to have the bottom level of a slab and not the top level? Is it possible using gdl?

Re: level for bottom surface of slab (for false ceiling purp

Erich — Thu, 11 Jul 2013 19:49:39 GMT

It's easy in GDL. The trick is setting the output values to be equal to the GLOB_ELEVATION-SLAB_THICKNESS. These are both global variables.

Re: level for bottom surface of slab (for false ceiling purp

alemanda — Fri, 12 Jul 2013 07:47:54 GMT

Yes!
What kind of object can I write? Is it a label (associated to the slab) or a level object?

Re: level for bottom surface of slab (for false ceiling purp

Anonymous — Fri, 12 Jul 2013 12:21:34 GMT

If, you are working in section or elevation ... then, thanks to Roberto Corona this little gem has come to light. Straight out of the linear dimension tool.

Perform a search on GDL for the level tool, this has been discussed before.

Re: level for bottom surface of slab (for false ceiling purp

alemanda — Fri, 12 Jul 2013 13:12:04 GMT

... no I would need it for the plan ...

Re: level for bottom surface of slab (for false ceiling purp

James B — Fri, 12 Jul 2013 13:15:16 GMT

alemanda wrote:
... no I would need it for the plan ...

In AC17 you can use the Label tool associated to the Slab to display it's top and/or bottom elevations via the "Dimension Label 17" library part.

Re: level for bottom surface of slab (for false ceiling purp

rob2218 — Thu, 02 Jan 2014 21:58:45 GMT

JAMES.
could you please explain step by step how to go about doing this?
I mean.....I see the "label" tool. i see the "Dimension Label 17" but I just can't seem to get the top of slab displayed?

Please..help.

Re: level for bottom surface of slab (for false ceiling purp

Karl Ottenstein — Thu, 02 Jan 2014 22:37:14 GMT

Don't know that James will be following this thread 6 months later... so, replying for him, Rob:

The key is 'associated'. Labels can either be independent (dumb) or associative (smart - read data from an element).

See:

http://helpcenter.graphisoft.com/guides/archicad-17-int-reference-guide/documentation/annotation/labels/placing-associative-labels/

although a typical workflow is to set up the default label (e.g., for slabs) here first:
http://helpcenter.graphisoft.com/guides/archicad-17-int-reference-guide/documentation/annotation/labels/tool-specific-default-labels/#1004703

Then, you just tick the 'Label Slab' checkbox in the slab tool settings to have the associated label appear. Once the label is placed, it can be selected independently of the slab to customize its appearance (over the default) vs other slab associative labels.

In 17, you can specify if you want the top, bottom, or both elevations displayed, and if it is relative to the story or the project. See screenshot.

I'm not fond of this new 'dimension label' since it doesn't have a symbol associated with it, only text. But, the numbers are 'live', and respond to any changes to the slab thickness or vertical position.

Re: level for bottom surface of slab (for false ceiling purp

rob2218 — Thu, 02 Jan 2014 22:40:31 GMT

thanks Karl,
got it.
was able to make the "slab label" using the "Dimension Label 17" read the proper elevation based off project zero.

it now reads the correct vertical elevation height of the slab object.
Yes....wish it had a "graphic circle elevation tag" connected to it's appearance as well.

Wonder who here has the knowledge to create such an animal?

Re: level for bottom surface of slab (for false ceiling purp

Anonymous — Fri, 14 Aug 2015 15:07:15 GMT

You can add the circle bit on by unchecking the "use symbol Arrow" option - see screenshot.

But...

When it places the Circle it places it oddly (in AC18 at least) second screenhot to follow..Any way round this..?

Re: level for bottom surface of slab (for false ceiling purp

Anonymous — Fri, 14 Aug 2015 15:09:15 GMT

Second screen shot shows two labels - one corrected manually, the other,at the bottom, as ArchiCAD places it. I've love to be able to find and select all of the slabs used as ceilings and hit Label Object and walk away. Instead i need to correct hundreds of fiddly label leader lines. anyway round this..?

Re: level for bottom surface of slab (for false ceiling purp

Laszlo Nagy — Fri, 14 Aug 2015 18:44:26 GMT

There is the Document\Document Extras\Label Selected Elements menu command, which is new to ARCHICAD 19. With that you can Label multiple elements in the same Viewpoint in one step.

Unfortunately the geometry of the Label's pointer is not something that can be picked up by the Syringe. Specifically, the lengths of the Pointer segments are not picked up, which is a problem.

One trick I know of is this. From my observation when a Label is placed, the length of the two segments will be SQR(200) millimeters and 10 millimeter, respectively, in printed units. This means that in model units they will be of different size depending on the current scale in the Viewpoint.
So my trick is that I place one Label and check how large or small it is compared to what I need. Then I change the Scale of the Viewpoint temporarily. Then I placed all those Labels, their sizes will be smaller or larger based on the scale. Then I simply switch back to my correct scale for the Viewpoint.
So if for example want a Label with a Pointer half the above mentioned size I would switch from M 1:100 to M 1:50 for the placement of the Labels.
I hope this makes sense.