Floor joists special

[daugaard]

Floor structure of 8m distributed over 2 spans with a central support in the middle. The easiest solution is probably 220 x 45 at cc 600 with double screwed and glued floor chipboards. That way you meet the deflection requirements!

 

[Gabbe1]

Is it really easier with two layers of screwed glued floor chipboard instead of custom-made floor joists? It certainly won't be cheaper, and moreover, the ceiling height on the upper floor will be reduced by 32mm.

But sure, it's a solution too, and it's always fun to get tips on solutions.

 

[Gabbe1]

I hadn't counted the space between the floors as part of the construction; the truss you chose should only provide vertical forces and not require anything from the between floors.

That's how it turned out.
I got the drawings for the scissor trusses yesterday, the manufacturer had to work for quite a while to come up with a freestanding solution that met all my requirements, but in the end, it worked!

The fact that the mid-floor works as an extra collar beam is thus an extra security, not a part of the roof construction.