Planning to put together two pressure-treated beams 45x145 so it becomes 90x145. Joist hanger against wooden wall on one side and resting on a 90-post 5 meters away. It should work without additional posts/support along the way, right?
Pidde
Pidde
Well, it depends on what you need to add, if it has to bear more than its own weight, it's probably too weak. It probably won't break if you have ONE person jumping on it, but it will likely bend quite a bit.
If you're thinking of using it to support a deck, I would guess you'll need a glulam beam that is at least 300 in height. But someone would need to calculate that. There are dimensioning programs online.
If you're thinking of using it to support a deck, I would guess you'll need a glulam beam that is at least 300 in height. But someone would need to calculate that. There are dimensioning programs online.
Best answer
https://www.byggahus.se/forum/threads/hur-stor-blir-nedboejningen.297641/#post-2740684
Here is a calculation for a similar load case, albeit with a span of 4-4.5 m but with a load of 100 kg in the middle. Berniberg claims that the deflection would only be 1.9 mm.
I calculated the load case in sagulator (as if the joists were a shelf with 1 kg load) and found that the deflection would be negligible (0.6 mm).
That said, I believe (here I'm guessing) that with the influence of moisture, consider precipitation, there will be a deflection over time that will become more or less visible. If you can increase the dimension in height, it is better.
Disclaimer: I only link to previous calculations and to a calculation site called sagulator. I have not calculated it myself. Wood structures are tricky but more information can be found at https://www.traguiden.se/konstruktion/dimensionering/dimensioneringsvarden-och-barformaga/
Here is a calculation for a similar load case, albeit with a span of 4-4.5 m but with a load of 100 kg in the middle. Berniberg claims that the deflection would only be 1.9 mm.
I calculated the load case in sagulator (as if the joists were a shelf with 1 kg load) and found that the deflection would be negligible (0.6 mm).
That said, I believe (here I'm guessing) that with the influence of moisture, consider precipitation, there will be a deflection over time that will become more or less visible. If you can increase the dimension in height, it is better.
Disclaimer: I only link to previous calculations and to a calculation site called sagulator. I have not calculated it myself. Wood structures are tricky but more information can be found at https://www.traguiden.se/konstruktion/dimensionering/dimensioneringsvarden-och-barformaga/
I would give it a try. It's not like you've spent a fortune if it turns a little weird after a few years...
If the beam only needs to support its own weight, there is no advantage to using two studs. However, it might look better. The instantaneous deflection should be about 2 mm, but it will increase over time since it is exposed outdoors; however, it will not be greater than acceptable.