subfloor thickness value

[Anonymous]

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

[Anonymous]

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

[Laszlo Nagy]

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

[Anonymous]

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

[Achille Pavlidis]

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?

[Anonymous]

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

[Srinivas]

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.

[Anonymous]

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

[Anonymous]

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

[Anonymous]

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