Hello everyone
I'm in the process of extending my 1 1/2 story house, as seen in other threads.
Now, the existing load-bearing wall in the new section will be replaced by an HEB beam of 180 or 200 mm, and I wonder if anyone knows what's suitable for it to rest on.
I am considering notching out some nailed/screwed together 45x195 so that the beam has about 15cm to rest on at each end.
Is that too much or too little, what's appropriate??
Very grateful for advice and tips
I'm in the process of extending my 1 1/2 story house, as seen in other threads.
Now, the existing load-bearing wall in the new section will be replaced by an HEB beam of 180 or 200 mm, and I wonder if anyone knows what's suitable for it to rest on.
I am considering notching out some nailed/screwed together 45x195 so that the beam has about 15cm to rest on at each end.
Is that too much or too little, what's appropriate??
Very grateful for advice and tips
The size of the stockpile you need is essentially determined by the load the wooden pole can withstand. For the beam's sake, a very small area is needed.
Hello Magnus, I really have no idea what 15 cm of glued & screwed 45x195 can handle, but if, according to Mathias, it suffices for heavier steel beams, I assume as an amateur that it will suffice for my smaller beam as well.Magnus_Nordmark said:
And in the design programs I've used for glue-laminated beams, the smallest glue-laminated beam's (equivalent to my steel beam) foundation should be at least 87 mm, so if the steel beam gets 150 mm, it should suffice according to my logic.
Or have I thought incorrectly and have a reason to doubt?
Responding despite not being named Magnus.
As far as I recall from my studies in structural mechanics, there should be no problem at all in your case.
The reason you need 87 mm in the glue-laminated beam case is to prevent the beam and the underlying joists from being pressed together by the pressure from above.
Generally speaking, steel can withstand significantly higher pressure without deforming, so it's just a matter of ensuring that the underlying wood can bear the pressure, and with 150, you seem to have substantial margins.
As far as I recall from my studies in structural mechanics, there should be no problem at all in your case.
The reason you need 87 mm in the glue-laminated beam case is to prevent the beam and the underlying joists from being pressed together by the pressure from above.
Generally speaking, steel can withstand significantly higher pressure without deforming, so it's just a matter of ensuring that the underlying wood can bear the pressure, and with 150, you seem to have substantial margins.
I agree with mats_o.
When it comes to the dimensioning of columns, it is rarely the stress from the overlying beam that is the limiting factor, but rather the buckling effect that occurs in the column. The longer the column, the more easily it buckles. I don't have figures on what moment of inertia such a wooden column would have, but it would be interesting to calculate this if I can get information on the wood's strength properties (we engineers mostly calculate with steel and aluminum).
When it comes to the dimensioning of columns, it is rarely the stress from the overlying beam that is the limiting factor, but rather the buckling effect that occurs in the column. The longer the column, the more easily it buckles. I don't have figures on what moment of inertia such a wooden column would have, but it would be interesting to calculate this if I can get information on the wood's strength properties (we engineers mostly calculate with steel and aluminum).