: How did you find the i-beam SB ? I have seen these around at lumber stores,
: and wondered how they would work. I am in the planning stage for a strip
: build (my first), and have spent a lot of time pondering what type of
: strong back to use.

I certainly don't know where to get one in Copenhagen, I'm afraid. They're very common in Canada as we're trying to use more fast-growing species of tree like aspen. They are generally made or sold by pre-fabricated wooden truss producers. Again, we have lots of those since our homes are nearly all timber stud wall construction.

Ask a building materials supplier who sells pre-fab trusses in your area, or search for "TJI joists" or "silent floor joists". If they're installed exactly according to instructions they don't squeak as you walk over them. I gave a link that you can at least use to print a spec sheet to show people what it is you're looking for.

For a strip builder, you might want to use two of them cleated together. It's only stiff in its intended direction, and can be made to bend quite a bit side-to-side. I don't have to worry about that, I just need a reference line.