Thinking about whether a doorway leading to an old garage in the basement might be something to tackle. The house is a 1½-story stone house from 1939. The part of the house that constitutes the "existing basement" previously did not have a residential area above it, only an old garage with a terrace on top. Currently, an additional floor has been added to the house, and the area above the "existing basement" is now a dining room, and above the dining room, there is a bedroom. In other words, the relevant wall serves as an old exterior wall of the house before it was extended. As the drawing shows, there are several existing doorways and alternating beams.
Is there anyone here who is skilled in calculations or who has experience in the subject? The ceiling height in the basement is 210 cm high, so a beam should not take up the entire height.
The red square illustrates where I want the doorway for a door that is 90 cm wide.
I'm planning to do something similar in my house, a single-story detached house with a basement from -37. I contacted a large, reputable construction company that came by several times to look and ponder. Then came a quote for 35,000 SEK after ROT. It felt unreasonable, so I terminated contact with them. Half that would be more reasonable.
Their plan was to install beams in an L-profile. You remove the plaster down to the concrete hollow block, cut a long deep horizontal groove above the future door opening, press the beam's horizontal part into the groove along with some expanding concrete, and plaster over the beam. Then you do the same thing on the other side of the wall from the other room. After that, you can start sawing out the opening.
The lowest standard door height seems to be 200 cm, and then you only have 10 cm left to place the beam. The question is whether it's enough. Sure, you can order shorter doors, but they are usually a custom job, and it becomes much more expensive. Moreover, it will feel low, and everyone will have to duck when passing through.
Yes, in the basement, and I have a ceiling height of 220 cm.
I'm not sure if I still have the quote in an old email, and I had a bit of trouble deciphering the dimensions and steel quality of the beams. I'll check once more.
I don't really know if I should ask for quotes from masons or carpenters or some other profession, so I asked a large construction company.
Feel free to research so you know roughly what is required.
The main thing with who you contact is that the company in question has a quality manager and someone qualified to calculate the load transfer. In that case, a large construction company sounds like a fairly complete entity
Have you got any opening or did you give up on it?
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