I wanted to check with you if this drawing shows whether the wall/walls between the kitchen and living room (red line) are load-bearing and the walls on the upper floor (green lines)?
It's hard to say much based on this drawing. The old part is a plank house, from the 1920s-1930s? The red wall is probably load-bearing, but not entirely certain. The part that goes alongside the stairs cannot be demolished, as the stairs would collapse. The green walls on the upper floor may be load-bearing but do not necessarily have to be. To say more, you need to investigate a few things. 1) The direction of the floor joists in the floor structure between the floors. 2) Document the roof truss construction.
hmm, almost understood that! too bad you didn't find the blueprint for the whole house.. but the floor joists run along the rafters, and the house was built in 1947 with an extension in 1969, but how can you determine if the house is a plank house?!
then there's the wall along the rafters on the upper floor which is in the middle of the rafters and divided by the chimney, where one half is uninsulated and the other side only insulated with wood chips for a small section (about 1m) due to being divided again by a door opening.
but I can get pictures and measurements of the rafters tomorrow as I unfortunately have to go through the hatch on the outside..
and the wall against the stairs on the lower floor can't be removed, install a laminated beam (if it's load-bearing) and reinforce/rebuild the stairs? or should you just forget that idea?
the plan is anyway that I'll open up the entire upper floor (about 40sqm), remove the wall on the lower floor and replace it with a laminated beam.
If it was built in 1947, it's a plank house. Are you sure that the floor joists even over the living room are parallel to the rafters? If so, there should be a beam in the ceiling. The stringers of the stairs are usually nailed to the plank wall. It is clear that it can be replaced with another form of construction, but it's probably not a task for a regular construction carpenter.
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