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23 replies
4k views
23 replies
Beam
As writing here now, thought about it, the hole is not through but 50mm into the beam which is 100mm, or actually, the hole is only 30mm deep but not notched all the way in. Normally, you would place posts right next to the windows that hold up the wall plate? If so, there would be a post 600mm from the hole and 400mm from the rafter.
Oh well, in the rest of the house, there won't be any drilling of holes, it will be a visible cable instead
Oh well, in the rest of the house, there won't be any drilling of holes, it will be a visible cable instead
Hmm... no one else has suggestions? or knows anything about bärigheter? what I imagine is that it's not a major issue since the post is so close to the truss and the beam isn't sawed through but rather a hole that is 75mm in diameter and 50mm deep, on a beam that is 200x100mm, maybe slightly larger than 200, but what do I know, I'm just a happy amateur 
Since I don't know anything about how the original designer calculated the beam (or why it exists), your question is impossible to answer with 100% certainty.hugodog said:Hmm... no more suggestions? Anyone knows anything about load-bearing capacities? What I imagine is that it's not a major issue since the post is so close to the roof truss and the beam isn't sawed through but has a hole that is 75mm in diameter and 50mm deep, on a beam that is 200x100mm, maybe slightly more than 200, but what do I know, I'm just a happy amateur![]()
Just offhand, I don't find the notch catastrophic, but considering the beam's dimensions, it is weakened to about 50% of its original load-bearing capacity.
If the designer over-dimensioned it, it's less dangerous than if it was calculated exactly for the load above.
If it's so-called estimated, i.e., the dimension was determined without exact calculations (much indicates this since height is most relevant for load-bearing, not width, which amateurs often overlook) and under-dimensioned, then it can be anything from okay to very dangerous.
Addition:
In my approximately 45 years in the construction industry as a craftsman, construction manager, designer, inspector, building inspector, developer, surveyor, etc., I've encountered all kinds of 'structures' that shouldn't even stand up according to theory and prevailing norms, but have been standing for over 100 years. Often following the old maxim: 'as long as it creaks, it holds'. The problem is the line between creak and break is very fine. The break often has dramatic consequences when it happens, usually a collapse.
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Went to the building committee and looked at drawings, found one about regulations in walls, etc., couldn't remember exactly what it said anyway so I didn't order it because I thought it was the one I had at home, came home and checked and can't find it
, either I never had it or it's gone, will have to go down on Monday and order...
The best thing is probably to let someone knowledgeable in the area come and assess the whole thing, it could be quite expensive if something were to happen?
Thanks for all the help by the way
The best thing is probably to let someone knowledgeable in the area come and assess the whole thing, it could be quite expensive if something were to happen?
Thanks for all the help by the way
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