I am evaluating different options for a 24 foot diameter Yurt platform. This will be a round platform elevated between 5 and 6 feet, with 18 anchorage points. I am hesitating between options for my "foundation". The options:
- Concrete deck blocks
- Screw piles
The expense of sonotubes or screw piles will dramatically increase the costs of the project. My feeling is that I can simply build the platform on concrete deck blocks. If the platform shifts I should be able to jack it and dig out or fill in as needed. I am wondering if anyone can make a compelling case for a deeper anchorage?
As for the local environment, I live on the Gaspé peninsula, about 600 m above sea level. We have a six month winter here, which means annual shifts in the soil as it freezes and thaws. The soil at my site is high in lime content, absent of clay deposits, and very rocky, Past 6 feet, I am told it is about 75% or more rock, but the actual bedrock is considered unreachable.
Many structures in my area are built on floating concrete slab.