Floor framing regulations?

[veztra]

I have a part of the house where I need to replace the floor, and I'm considering what size of joist in the floor structure is needed. I've searched quite a bit but can't find any help anywhere.

It's an area of 6200x4000mm where the joist will be free-hanging at 4000mm.

There's a possibility to place a support beam in the middle, but I'd prefer to avoid that as the space underneath is valuable.

I'd rather not use laminated timber as it increases the cost.

Tobbe

 

[GustavW]

45x220 with glued screwed chipboard is OK up to 4-4.5 meters cc 600mm if I remember correctly. Check http://www.traguiden.se, there's a lot of useful information there.