I've been hanging around this forum for a while now, hoarding lots of inspiration, but this is actually my first own post. There will surely be more to follow as I have many high-flying plans for my property. This issue is still in the planning stage, and no crowbars are going through walls just yet... but preparation is said to be everything in this world.
My house is, for the most part, a classic 70s house, i.e., a 1½-story with a furnished upper floor. It has concrete tiles over lacquered hardboard (no sheathing, in other words) on the roof with a 45° pitch. It has a wood/brick facade, water-based heating via radiators (air-to-water pump), and of course, it is built on an uninsulated slab on the ground. I don't have any moisture or sill problems (yet, at least), so I hope to avoid addressing that discussion.
I wish to remove quite large parts of a wall that runs between the bedroom/living room and the kitchen, where there are currently two doorways to each room. From the gable to the nearest wall that might support a suitable beam, it's about 6 meters (yellow marking according to the floor plan). Considering the roof trusses' (2x7") span of ~9 meters and the somewhat vague detail in the section image, it's pretty obvious the wall is load-bearing, right? Unfortunately, I lack detailed drawings for the slab other than it being described with words like Lecaisolated edge-reinforced slab on the ground, and I can visually see that the footing is about ~30cm (varying up to 40cm in some places). From the outside, I can perceive some "extra steel" sticking out of the concrete in line with the load-bearing wall's placement. The wall itself is only built with 45x90 under single plasterboard.
Beam dimensions and material as a secondary question, my primary question is whether there's any reasonableness in attempting this operation or if the loads (at least at the gable) will become unreasonably large on the posts and slab that should hold up such a beam.
Grateful for all help and thoughts. Feel free to ask if there's anything I can elaborate on
If the slab is lecaisolerad, it means there are lecakulor under the concrete. Thus, it is not uninsulated!
A 6 m beam as a replacement for the heart wall seems unrealistic to me. It will be very high and the column loads at its ends might become too large compared to what the voten in the slab can handle. You should consider at least one column on the wall, preferably in the middle.
Non-insulated would obviously not be unpleasant, but unfortunately, I think it sounds a bit better than it is... with the caveat that I'm almost a layman here, of course. But the plinth under the façade consists of plastered blue concrete/(leca?) and I have my suspicions that it's just the "top row" near ground level since the rest of the foundation under the ground is rock hard, most likely pure concrete, and I basically only find stone and gravel when I've dug down to the casting beard. I actually found a picture here on BH that somewhat corresponds with the foundation/slab I see on my house. Just like mine, the floors are significantly higher than the edge of the plinth.
Well, the presence or absence of insulation. Back to the heart wall 6 meters was really just a way to get a clean surface to paint on. The end result I've daydreamed about is more something along the lines of the picture below where I will have the opportunity to save a piece of wall / connect with the slab, albeit not precisely in the middle. If this were doable, is it better to use two separate beams, or would one gain anything from keeping a 6-meter full-length resting on three points?
