Floor structure

[PärLarsson]

If you buy glulam with the dimensions 215x225 mm of the homogeneous quality and have them split to 110 mm in height (alternatively special order that dimension from the factory), then c/c 600 mm is sufficient.

Can't find any glulam with dimensions 215x225 online, do you know any good site?

 

[PärLarsson]

I would dig deeper in the middle of the room and cast a strong concrete ring around it so that the foundation cannot cave in. So it becomes like a cast concrete ledge, let's say 10 or 20 cm high and half a meter wide around the entire room with full standing height in the rest of the room. The ledge becomes a good dry shelf to place things on.

Unfortunately, it doesn't work as the drainage isn't deep enough.

 

[justusandersson]

215x225 is a standard dimension. If you follow this link to Träguiden, there's a table. Then you need to check the websites of the major manufacturers, Martinsson, Moelven, Setra.
https://www.traguiden.se/konstrukti...nerande-barformaga-b90-215/?previousState=100