topic Re: Drawing a slab. in Modeling

Drawing a slab.

Anonymous — Thu, 25 May 2023 15:36:28 GMT

I have some questions about drawing a slab. For instance the slab of the flooring of the first floor, where should be drawn In the first floor with 0 relative elevation or in the previous floor with the real height elevation.

Re: Drawing a slab.

Barry Kelly — Thu, 05 Apr 2018 08:40:29 GMT

I would place it in the storey it belongs to (at zero elevation - but it could also be any height for say a raised or mezzanine floor).
That way when you view that story you will see the floor (if the layer is on).
You can also set a slab to display on storeys above and below in the slab settings.

Barry.

Re: Drawing a slab.

Steve Jepson — Tue, 10 Apr 2018 19:58:39 GMT

darwinland wrote:
.... the slab of the flooring of the first floor....

Are you sure you want to model that flooring as a slab? What is the flooring going to be? What kind of data would you like to be extractable from the flooring into an Interactive Schedule? How many flooring skins will there be? that sort of thing might make a difference too since not all elements can be shown in the same way relative to the Story they are on.

Re: Drawing a slab.

Brett Brown — Tue, 10 Apr 2018 22:29:14 GMT

Come on Steve, please answer your own questions and the reasons why you wouldn't use slabs. He's a new user and you have totally confused him as well as me. Make it a teaching session.

Unfortunately, Archicad is sadly lacking quality tutorials on this sort of thing. They show you what the tool is for and how to use it but none of them explains the reasoning of using it one way for better results further down the line.

I know Barry is the number one helper on this forum and hasn't the time to explain in this case why one way is better than the other, especially down the line for document output.

This is relevant for most of the tools in Archicad.

There is an opening for someone like you Steve to record and explain all these little rules (as in this question) in short tutorials at a minimal cost to the new (and existing) users.

What do other users think? cheers

Re: Drawing a slab.

Barry Kelly — Wed, 11 Apr 2018 02:41:02 GMT

I didn't think that darwinland was asking about why he should use a slab for the floor or not.
Just which storey it would be best modelled in.

Barry.

Re: Drawing a slab.

Anonymous — Wed, 11 Apr 2018 08:21:58 GMT

My question was about how can I have the uncut lines with dashed-poit lines if the slab is above of my plan view, and continuous if my slab is on my plan view. This is very useful for openings on the slab above.

Re: Drawing a slab.

Barry Kelly — Wed, 11 Apr 2018 08:56:01 GMT

darwinland wrote:
My question was about how can I have the uncut lines with dashed-poit lines if the slab is above of my plan view, and continuous if my slab is on my plan view. This is very useful for openings on the slab above.

I would model the ground floor slab in the ground floor and the first floor slab in the first floor.
Keeps it simple modelling it in the storey it belongs to.
Then in the 'Floor Plan Display' settings for the slab you can set the upper floor slab to "Show in home storey and one storey down'.
It will now show on the ground floor.
The line type will be as set in OPTIONS menu > Project Preferences > Legacy

Unless I am missing something very obvious, a slab does not have an option for overhead lines like a beam or wall does.

As much as I hate to say it though, sometimes it is best to manually draw in lines for the overhead slab extents and openings.

Barry.

Re: Drawing a slab.

Erwin Edel — Wed, 11 Apr 2018 10:17:18 GMT

I use an object for holes. SEO out of the slab for quantity take off, nice 2D symbol for floorplans. Win / win?

Large holes (mezzanine/loft, stairwell, etc) I do model in the slab, but I suspect this is more about typical holes for MEP and such?

Re: Drawing a slab.

Anonymous — Thu, 12 Apr 2018 13:56:34 GMT

Barry wrote:
darwinland wrote:
My question was about how can I have the uncut lines with dashed-poit lines if the slab is above of my plan view, and continuous if my slab is on my plan view. This is very useful for openings on the slab above.
I would model the ground floor slab in the ground floor and the first floor slab in the first floor.
Keeps it simple modelling it in the storey it belongs to.
Then in the 'Floor Plan Display' settings for the slab you can set the upper floor slab to "Show in home storey and one storey down'.
It will now show on the ground floor.
The line type will be as set in OPTIONS menu > Project Preferences > Legacy

Unless I am missing something very obvious, a slab does not have an option for overhead lines like a beam or wall does.

As much as I hate to say it though, sometimes it is best to manually draw in lines for the overhead slab extents and openings.

Barry.

When you mean ground floor you mean first level, and when you mean first floor you men second level right?

Re: Drawing a slab.

Barry Kelly — Fri, 13 Apr 2018 01:41:22 GMT

darwinland wrote:
When you mean ground floor you mean first level, and when you mean first floor you men second level right?

Who knows? - I think us Aussies have a slightly different naming convention.

Ground floor for me is the one on the ground (storey zero or storey 1 in the USA version).
First floor is the next one up.

It doesn't matter, just model the slab for each storey in that storey.
Set to 'Show in home storey and one storey down', then on any storey you will see the slab on the storey above.

Barry.

Re: Drawing a slab.

Anonymous — Tue, 24 Apr 2018 06:13:55 GMT

Ok I ll draw the slab in its own floor. Lets get an step forward. When you need to represent openings, thats means a continuous line in its floor and a dot-dashed line in the floor above. How do you set up the uncut lines, is there any kind of override that solve this or you have to draw a line to represent openings in the floor above and set up the slab only to be shown in its own floor.

Re: Drawing a slab.

Barry Kelly — Tue, 24 Apr 2018 06:32:13 GMT

You are on the ground (lower) floor.
The slab above is modelled in the storey above and set to show on its own storey and one storey down.
In the project preferences you set the line type for the storey above as dashed.

You should now see the entire slab with holes as a dashed line from the lower storey.

If you don't want to see the entire slab, set it to show in home storey only.
Then you could place an object representing the hole in the slab above.
Set this object to show in own storey and one storey below.
This will only use the linetype set up in Project Preferences if you turn off the floor plan display option to use object linetypes.
Or sometimes it is just easier to draw lines.
Not such a good option as they are not associated to the slab or holes above.

Barry.

Re: Drawing a slab.

Steve Jepson — Sat, 05 May 2018 03:46:38 GMT

Brett wrote:
Come on Steve, please answer your own questions and the reasons why you wouldn't use slabs. He's a new user and you have totally confused him as well as me. Make it a teaching session.

Unfortunately, Archicad is sadly lacking quality tutorials on this sort of thing. They show you what the tool is for and how to use it but none of them explains the reasoning of using it one way for better results further down the line.

I know Barry is the number one helper on this forum and hasn't the time to explain in this case why one way is better than the other, especially down the line for document output.

This is relevant for most of the tools in Archicad.

There is an opening for someone like you Steve to record and explain all these little rules (as in this question) in short tutorials at a minimal cost to the new (and existing) users.

What do other users think? cheers

The thing is, wherever you have a slab-on-grade you also have thickened slab under some walls, sloped slabs, slabs with turned down edges...you need to select elements that when used together will display the dashed lines you want with out having to draw any lines at all. I make foundation plans all the time with no lines. https://www.screencast.com/t/SXqGQVWRHPtl

As for the tutorials:
ain't no buddy got time fadat!