Reinforce floor joists, closer spacing or glue together

[Kallebo]

But would it be advantageous from a stability and environmental perspective to screw-glue 21 mm plywood instead of 22 mm chipboard flooring?

 

[justusandersson]

Absolutely! I think so. I believe that plywood contains a smaller amount of glue than particleboard. Additionally, particleboards have rather poor static properties, are heavy, and easily become permanently deformed. A particleboard floor over time looks like a water surface with small waves. Particleboards have only one good property, they are cheap. 21 mm construction plywood is a fantastic stiff material.

 

[spaxx]

Now I have glued and screwed a 45x195 on each side of all 14 pieces of 70x195. Where heavy furniture will stand, I have also added a 90x195 laminated beam, a total of 4 pieces.

 

[prototypen]

Then it won't be long until a completely sealed bjälklag?

 

[DrGreenbaum]

Are you still using c/c approximately 300mm or is it 570-something?

 

[Rabbithole]

So you now have 14 160x195 beams?

Sand is, by the way, an awesome sound and vibration dampener.

 

[Oldboy]

Excellent! There's nothing like solid doningar.
It's a great feeling knowing that there are 7x8" massive beams in the floor. You can get goosebumps for less.

 

[Joppie]

Now I have glued and screwed a 45x195 on each side of all 14 pieces of 70x195. Where heavy furniture will be placed, I have also placed a 90x195 laminated timber beam, total 4 pieces.

Did it turn out well? I'm considering a similar solution, possibly with metal beams instead on each side since the span is 7 m