Construction veteran
· Stockholm
· 340 posts
Neat indeed, well done!
I've straightened the floor joists by screwing 45x170 on one side. Since the beam was already level and ready, it was just a matter of attaching the studs at the same height as the beam, leveling with a level, and double-checking at the edge with the other studs before everything was screwed down securely. According to the level, I'm within 1mm over 2 meters across the entire surface, and my OCD is rejoicing.
I screwed with 6x120 screws with about 45cm spacing. Most of the floor joists were screwed correctly, but by placing the screws to hit the joist near where the stud rests, it was still possible to secure them properly. I have a slightly crazy plan to reinforce this further while fixing that the c-c spacing is more than 600. I'll share more pictures once I've made more progress.
I screwed with 6x120 screws with about 45cm spacing. Most of the floor joists were screwed correctly, but by placing the screws to hit the joist near where the stud rests, it was still possible to secure them properly. I have a slightly crazy plan to reinforce this further while fixing that the c-c spacing is more than 600. I'll share more pictures once I've made more progress.
The best thing is to screw glue so that the beams are reinforced into a single homogeneous wooden beam. But nice anyway! It will definitely be rigid.
Now I have finally moved forward so that it is time to fix the floor below the joist. The floor is 5.4m wide and 3.4m long, and I have placed a horizontal beam 230x180 in the middle of the room, so the beam will have a span of 3.4m.
The walls that will support where the beam is are made of lightweight concrete, so I am considering using vertical steel columns to support the beam as these can be embedded in the lightweight concrete. On one side, the wall will be 30cm thick, but I would prefer it to be thinner on the other side if possible, ideally down to 10cm.
The question is what kind of steel column would work.
My amateur math is if I calculate the joist at 0.5 kN/m2, it gives me 9.18 kN on the floor area, which is 18.36 sqm. Since the joist supports the outer walls on two sides, the load on the columns should be lower, a third I think, so 3.6 kN. This load is equally divided between the two columns supporting the central beam, which would then give 1.8 kN per column. The columns will be about 2.4m long, which of course affects the load.
I was planning to check with a company that can manufacture the columns for me to see if they can calculate suitable dimensions, but it's reassuring to have some knowledge when I talk to them. Therefore, I thought someone with expertise here on the forum might be able to say something about the matter
The walls that will support where the beam is are made of lightweight concrete, so I am considering using vertical steel columns to support the beam as these can be embedded in the lightweight concrete. On one side, the wall will be 30cm thick, but I would prefer it to be thinner on the other side if possible, ideally down to 10cm.
The question is what kind of steel column would work.
My amateur math is if I calculate the joist at 0.5 kN/m2, it gives me 9.18 kN on the floor area, which is 18.36 sqm. Since the joist supports the outer walls on two sides, the load on the columns should be lower, a third I think, so 3.6 kN. This load is equally divided between the two columns supporting the central beam, which would then give 1.8 kN per column. The columns will be about 2.4m long, which of course affects the load.
I was planning to check with a company that can manufacture the columns for me to see if they can calculate suitable dimensions, but it's reassuring to have some knowledge when I talk to them. Therefore, I thought someone with expertise here on the forum might be able to say something about the matter
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If you are going to embed them in the wall, is there anything stopping you from going up to 3 or 5 poles?
(Apart from the cost, of course, although slimmer poles may be somewhat cheaper, the "fixed" cost per pole is likely to be the majority)
In other words, if it is more important that they are slim for a thinner wall than that it is as cheap as possible?
(Apart from the cost, of course, although slimmer poles may be somewhat cheaper, the "fixed" cost per pole is likely to be the majority)
In other words, if it is more important that they are slim for a thinner wall than that it is as cheap as possible?
I'm quite flexible, the post on the narrow side can absolutely be, for example, 100x300mm or similar, the question is what is required to achieve appropriate load-bearing capacity, and whether an I-beam, square profile, or whatever would be best.Dowser4711 said:
I have looked around a bit and found that an HEA 100 profile at 2.4m can handle about 30 tons, so there should be absolutely no problem fitting the load-bearing capacity into a post in a 100mm thick wall.Kristofferm said:
Aren't you going to use the room for something?
You should use 2.5 kN/m2 +0.5 for the deadweight if you're going to use it as living space. 1 kN/m2 if it's just storage space.
Now you saw that the pillars can take a lot of load anyway, but just so you don't miscalculate.
The space is mostly a passage room above the stairs, so there won't be much in it, but it's always good to design upwards. Thanks for the great post!Q qvirre said: