What sizing of piers on bedrock for a two-story house in snow zone 2.5 should I consider?
We plan to extend our existing cabin (single story, originally a summer cottage) with 6.6 x 7.8 per floor, i.e., about 50 sqm per floor. The cabin is situated over sloping bedrock and stands on piers, we want to use piers for the extension as well. Finding a constructor and firm for such foundation work has proven to take time. I therefore want to do some rough calculations so I have an idea of where it might land.
Am I thinking incorrectly if I assume that the extension's own weight will be under 50 tons, which with 21 piers and snow zone 2.5 gives: 500 + 250 (2.5 x 50 sqm x 2 for securing) kN which with 21 piers becomes about 36 kN per pier. So say about 50 kN?
Bedrock should withstand 400 kN/m2? Then I get that we need 0.125 m2 which should be the square root of 0.125/3.14, i.e., just under 0.2 m radius...
, i.e., piers with 400mm in diameter?
We plan to extend our existing cabin (single story, originally a summer cottage) with 6.6 x 7.8 per floor, i.e., about 50 sqm per floor. The cabin is situated over sloping bedrock and stands on piers, we want to use piers for the extension as well. Finding a constructor and firm for such foundation work has proven to take time. I therefore want to do some rough calculations so I have an idea of where it might land.
Am I thinking incorrectly if I assume that the extension's own weight will be under 50 tons, which with 21 piers and snow zone 2.5 gives: 500 + 250 (2.5 x 50 sqm x 2 for securing) kN which with 21 piers becomes about 36 kN per pier. So say about 50 kN?
Bedrock should withstand 400 kN/m2? Then I get that we need 0.125 m2 which should be the square root of 0.125/3.14, i.e., just under 0.2 m radius...
, i.e., piers with 400mm in diameter?
Hi, I'm basically going to do the same thing as you.
Do you have 3 rows of plint or?
Have you already cast the plints?
What reinforcement did you use?
Do you have 3 rows of plint or?
Have you already cast the plints?
What reinforcement did you use?
Hello. Initially, we were in contact with two of the big players, but one didn't respond and kept making promises. The other sent a quote after we pushed for a couple of months, but it was for something entirely different than what we asked for (concrete slab) for crazy amounts. Got a tip from a carpenter who talked to another carpenter who also turned out to be a designer, so we got drawings within a day when we contacted them. Can send a PM if you want to know who they are.Anders Bylund said:
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