u/DunnoShiteAboutFark

Units are in mm since I live in Australia.

Hello everyone. I just want to get your thoughts on this. Joist span is 2200mm and joist spacing is 400mm OC. I plan on running 1 row of blocking in the middle of the joists. All joists and blocking will have joist tape applied on top. I have spare lengths of 90x45 so am hoping to use those for blocking instead of buying another length of 140x45. From my limited understanding blocking does not contribute to load bearing, only for stability and rigidity of the deck. So my questions are below:

Is 1 row of blocking enough?

Can I use smaller timber for blocking?

Does my blocking need to sit flush with the top of the joists or can it sit lower?

Thank you in advance!