Hello.
I'm in the demolition mood and planning to open up a wall into the living room. However, I'm a bit uncertain whether my intended construction will be sufficient. Perhaps someone knowledgeable can help me a bit.
Some input:
The house was built in '45 and has three floors: basement, ground floor, and upper floor. The wall to be removed is on the ground floor. Plank walls everywhere. The span of the new opening will be 2m.
My idea was to nail two 95x45 on each side of the opening and place a 220x45 beam on top. See attached image. I would like to place two 220 beams on top instead of one, but that creates problems with the electricity. Personally, I think this feels quite sturdy, but you never know. If things go wrong, the association board will hang me from the large pine outside the house, and I don't intend to give them that pleasure.
/Jeppe
I'm in the demolition mood and planning to open up a wall into the living room. However, I'm a bit uncertain whether my intended construction will be sufficient. Perhaps someone knowledgeable can help me a bit.
Some input:
The house was built in '45 and has three floors: basement, ground floor, and upper floor. The wall to be removed is on the ground floor. Plank walls everywhere. The span of the new opening will be 2m.
My idea was to nail two 95x45 on each side of the opening and place a 220x45 beam on top. See attached image. I would like to place two 220 beams on top instead of one, but that creates problems with the electricity. Personally, I think this feels quite sturdy, but you never know. If things go wrong, the association board will hang me from the large pine outside the house, and I don't intend to give them that pleasure.
/Jeppe
If the wall is load-bearing, I believe you might need to submit a building notification (could be wrong). In connection with this, I think you need to present structural calculations carried out by a professional.
If it is a multi-family house, I suspect it's not just a matter of strength but also fire rating and such that come into play. That is, it should have the right strength even after a certain time in a fully developed fire. Note that wooden beams are often chosen because they are more fire-resistant than steel beams. Steel becomes soft and buckles. Wood of sufficient thickness burns very slowly once the first millimeters have charred.
When making an intervention in load-bearing structures in a housing cooperative, the board should also require you to "prove" the construction by hiring a professional for the calculations.
If it is a multi-family house, I suspect it's not just a matter of strength but also fire rating and such that come into play. That is, it should have the right strength even after a certain time in a fully developed fire. Note that wooden beams are often chosen because they are more fire-resistant than steel beams. Steel becomes soft and buckles. Wood of sufficient thickness burns very slowly once the first millimeters have charred.
When making an intervention in load-bearing structures in a housing cooperative, the board should also require you to "prove" the construction by hiring a professional for the calculations.
You must make at least a building notification if it's a matter of a load-bearing structure, for information to the brf should suffice. The durability of a 220x45 is quite good over the short distance, but of course, if the neighbor above has a 700-liter aquarium with sand and stones weighing several hundred kilos, it could cause some problems...
Okay thanks for your answers, I will talk to the municipality regarding the building notification and also with the board.
jeppe
jeppe