I will try to explain, in each joist bay cc600, a board or e.g. 45x45 stud is placed from the bottom edge of one beam to the top edge of the next, and a similar one in the other direction to form a cross. These crosses are placed in a straight line from wall to wall; if the joist length is 3-4m, you place one row, for longer spans, 2 rows. Keep a close eye on the cc distance.
 
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DSC00684_edited_17_1.JPG
 
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Then you can discuss whether it's really necessary.
I believe it's just as good to use the same dimension as the floor joist and add cross-bridging between.
First, I nailed my 3 x 5" through the beam.
Then I screwed with 5x120 screws Biltema screws (one towards the top edge and one towards the bottom edge), and it actually made a difference, which I didn't initially think, but it became stiffer with screws.

My recommendation is to cross-bridge and screw.
Cross-bracing is fine craftsmanship, but it takes unnecessarily much time, and there is no difference in the end.
 
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S
what speaks for using 45*45 is that it's always been done that way to use up the entire "stock" (that the timber is cut from)
and you the points where you want them.
nowadays we want to use the timber we've bought and not throw it away.
 
I think I almost understand what you mean SBH, but feel free to clarify your post.
 
S
Once upon a time, timber was cut specifically for the house being built, which meant that they wanted to use up all the timber. Now, one buys in the dimensions desired and prefers to use up all the spillvike.
 
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Ok, göra åt = "put an end to".
 
S
Yeah. don't usually use it?
 
Thank you for the answers. It is now completely clear to me!:thumbup:
 
By the way, I don't think I can use either krysskolv or kortling because my joists consist of timber with slightly rounded edges.
Does anyone have a different opinion on that?
 
Google is good ...
Krysskolvning.JPG
 
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