topic subfloor thickness value in Modeling

subfloor thickness value

Anonymous — Thu, 25 May 2023 16:03:32 GMT

Does anyone know what the subfloor thickness value (on parameters panel of doors and windows) is for?
I looked it up in the manual (AC 8 ) it says it allows you to adjust the nominal sill height to the desired level of the slab connected to the host wall.
Whatever value I type in, it seems nothing changes in the model, the window settings or calculation lists.

Hielke

Re: subfloor thickness value

Anonymous — Thu, 02 Dec 2004 11:48:18 GMT

I guess this is an obscure feature of ArchiCAD.
Nobody using this?

Re: subfloor thickness value

Laszlo Nagy — Fri, 03 Dec 2004 13:09:03 GMT

We are always using it.
This value basically defines the distance between the bottom of the Wall and the finished floor level.
The way we model our houses is we model Walls from top of slab to the bottom of the slab on the next level. This is good because you can provide structural data and models to our structural consultants this way.
Let us say that above the slab, there is 10 cm to the finished floor level. You want your Doors to align with the finished floor level.
So for a Window with 90 cm parapet, you make it 100 cm high from the bottom of the Wall, enter 10 cm for Subfloor Thickness.
The window will correctly display 90 cm for it parapet. (The parapet is always calculated by dividing subfloor thickness from the sill height from the bottom of the wall).
HTH

Re: subfloor thickness value

Anonymous — Fri, 03 Dec 2004 15:59:51 GMT

We also use it extensively;

a) commercial buildings (as per Laszlo) to get the bottom of the door above the screed

b) office premises - to get the bottom of the door above raised flooring systems

c) residential - allowing 10mm - 1/2" for floor finishes also allows you to deal effectively with floor strips at changes in covering.

HTH - Stuart

Re: subfloor thickness value

Achille Pavlidis — Tue, 09 May 2006 07:23:59 GMT

sorry for taking back this old thread but i have been trying to understand the use of the subfloor thickness the last few days and i'm confused.

So for a Window with 90 cm parapet, you make it 100 cm high from the bottom of the Wall, enter 10 cm for Subfloor Thickness.
The window will correctly display 90 cm for it parapet.

this is correct but to my opinion causes some confusion on the construction drawings, as on the dimension markers you have the actual dimensions of the hole where the window will be placed but the sill value refers to the value from finished floor. This is a problem because when the wall is being built the finished floor is not yet placed, and it may cause the sill to be measured from the slab.

The major problem i have encountered when using the subfloor thickness is with doors. When placing a door, say 2.30m a setting a value of the subfloor thickness of 0.10m, this would mean that the height from finished floor would be 2.20m, and that is the height that the carpenter will consider for the fitting. This should be considered by Archicad when making the fittings schedule, i.e. a door 2.30m with a 0.10m subfloor thickness should appear 2.20m high.

Has anyone else encountered the same problems? What are your opinions?

Re: subfloor thickness value

Anonymous — Tue, 09 May 2006 07:52:25 GMT

StuartJames wrote:
We also use it extensively;

a) commercial buildings (as per Laszlo) to get the bottom of the door above the screed

b) office premises - to get the bottom of the door above raised flooring systems

c) residential - allowing 10mm - 1/2" for floor finishes also allows you to deal effectively with floor strips at changes in covering.

HTH - Stuart

Perfect explanation. We use it the same way. Not just an obscure option

Re: subfloor thickness value

Srinivas — Tue, 12 Sep 2006 18:23:00 GMT

Dear all,

I am also having difficulty in understanding the subfloor thickness parameter.

According to the fig. the subfloor is just a 2d representation in the section. We will not take the subfloor thickness into consideration when putting the base slab. But in detailed drawings we do show the sub floor thickness just as a 2d representation. I want the window sill to be 900mm from the subfloor and not from the base so I added the subfloor thickness value in the window properties hoping that it will move up, but it's not working the same way as I understand the above discussion.

Please guide me.

regards,
Srinivas.

Re: subfloor thickness value

Anonymous — Thu, 30 Nov 2006 17:12:37 GMT

Srinivas wrote:
...I am also having difficulty in understanding the subfloor thickness parameter...

I'm having the same problem understanding/using this feature.Has anyone ever figured this out??? When I change the Subfloor thickness value the window vertical position does not move accordingly...nothing changes

Dan K

Re: subfloor thickness value

Anonymous — Thu, 30 Nov 2006 18:26:22 GMT

The subfloor thickness value does not affect the vertical position
of a door or window at all. It only shows up in the displayed
sill height in the marker. Personally, this confuses not only me
but the poor sop who has to build from our drawings.
I never use this setting or markers for that mater.
If I want my doors to clear the finish floor I elevate
them the thickness of the finish floor from the bottom
of the framed wall and note this on the plans.
Peter Devlin

Re: subfloor thickness value

Anonymous — Thu, 30 Nov 2006 19:44:00 GMT

Peter wrote:
The subfloor thickness value does not affect the vertical position
of a door or window at all...

Peter,
Thanks for the clarification...at least I now know I wasn't doing anything wrong. I wonder why graphisoft hasn't scripted the wdws to properly reflect this subfloor value in elevation and 3d??? It would be a pretty simple adjustment to make in the master script of doors and windows.

Dan K

Re: subfloor thickness value

Anonymous — Thu, 30 Nov 2006 20:12:01 GMT

Hello Dan,
Scripting doors and windows in the way you describe would be simple.
Why don't you script a window and a door this way and
see what the implications might be.
Peter Devlin

Re: subfloor thickness value

Anonymous — Tue, 11 Dec 2007 06:28:31 GMT

laszlonagy wrote:
We are always using it.
This value basically defines the distance between the bottom of the Wall and the finished floor level.
The way we model our houses is we model Walls from top of slab to the bottom of the slab on the next level. This is good because you can provide structural data and models to our structural consultants this way.
Let us say that above the slab, there is 10 cm to the finished floor level. You want your Doors to align with the finished floor level.
So for a Window with 90 cm parapet, you make it 100 cm high from the bottom of the Wall, enter 10 cm for Subfloor Thickness.
The window will correctly display 90 cm for it parapet. (The parapet is always calculated by dividing subfloor thickness from the sill height from the bottom of the wall).
HTH

Sorry to drag this up again, but I'm still trying to convince myself that this really isn't an obscure setting. Laszlo, would you mind telling us what settings you're using, with the image below as a reference?

It's a task to get my head around the fact that it doesn't move in 3D if the subfloor thickness is set. So is it purely and exclusively for the purpose of getting the sill value in the door marker to show up with the correct information? And do builders over there, usually assume the sill is off the finished floor, or do you add further notation to it?

Any additional info to clear this up would be appreciated. Thank you.

Hunter.

Re: subfloor thickness value

Laszlo Nagy — Tue, 11 Dec 2007 10:12:44 GMT

Hello Hunter,
Yes, what you did in the settings Dialog is correct: we set the two fields you marked to the same value.
Yes, in Hungary, constructors know that the Sill is always measured from the finished floor level, so if they see 90 cm on the plan, then they look at the drawings, read off the floor thickness (let us say 12 cm) and so they know the sill must be 102 cm from the top of the slab structure.

Another thing I actually do in my drawings is I set the lower oversize value of the Door to the value of the sill height so I don't have that ugly wall piece below the Door in sections (that 50 mm piece in you attached image), and I can make the section details nice.