I am soon going to build an Attefallshus of about 22 square meters. It will stand on 12 pillars (30 cm diameter) which are already cast and ready. However, I don't think the placement of the pillars turned out perfectly, and I am now wondering if it is okay to proceed with the construction or if the pillars need to be redone?
The foundation beam on the pillars is made of glulam 115x225 mm and the floor joists are 45x195 mm. What concerns me is that the walls of the house will not be positioned above the glulam beam and especially not above the pillar.
I made a small sketch in Sketchup to explain what I mean. According to my calculations, the wall on the short side will end up about 30-40 cm outside the pillar and the long side about 40-50 cm outside the pillar.
I will soon be building an Attefallshus of about 22 square meters. It will stand on 12 foundation posts (30 cm diameter) that are already cast and ready. However, I don't think the placement of the posts turned out perfectly, and I'm now wondering if it's okay to proceed with the construction or if the posts need to be redone.
The main beam on the posts is of glulam 115x225 mm and the floor joists are 45x195 mm. What concerns me is that the house's walls will not be directly above the glulam beam and especially not above the posts.
I made a small sketch in Sketchup to explain what I mean. According to my calculations, the wall on the short side will end up about 30-40 cm outside the post and the long side 40-50 cm outside the post.
[image][image][image]
That shouldn't be a problem for an Attefallshus, right?
You don't have to have the posts all the way out at the edge if the joist is supporting in itself, and a 40 cm overhang doesn't seem like much if everything else is properly dimensioned.
By the way, it's the long sides that bear most of the load if it's a typical gable roof, as the roof load and snow load go down through the trusses on the long side walls. And then this load will end up on the glulam beams (with a bit of overhang there as well, it seems) and then down into the posts. And these glulam beams should have the right dimensions.
¨That shouldn't be a problem for an attefallare?
You don't need to have the foundations completely on the edge if the joists are self-supporting, and a 40 cm overhang doesn't seem too much if everything else is well dimensioned.
By the way, it's the long sides that bear most of the load if it's a standard gable roof, as the roof load and snow load go down through the rafters on the long side walls. And then this load will end up on the glulam beams (with a little overhang there as well, it looks like) and then down into the foundations. And these glulam beams should have the right dimensions.
Thanks for the reply! Good to hear. The roof construction will be a pitched roof, like this:
