I know this has been discussed before, but I'm not sure there was a consensus.
I've started excavating for an L-shaped foundation for a Casa 90 oven at the corner and work space and small stone bench at the left and right (sketch attached). Our soil here is hard clay. I am leaning toward a 5" reinforced slab on 5" of crushed stone, maybe with thickened edges. I know that if I try to dig or drill to the frostline I'll hit large boulders and it will be a huge undertaking but I'm a little nervous about having the thing float.
This weekend, I cut the adjacent patio to make room for the oven. The patio is 4" thick, with no reinforcing (looks like the truck showed up before they had the mesh raised above the stone bed and they just poured the slab on top instead of embedding the meash), on only a few inches of fine crushed stone, yet it's been quite stable. This makes me a little less nervous about floating.
Any thoughts?
I've started excavating for an L-shaped foundation for a Casa 90 oven at the corner and work space and small stone bench at the left and right (sketch attached). Our soil here is hard clay. I am leaning toward a 5" reinforced slab on 5" of crushed stone, maybe with thickened edges. I know that if I try to dig or drill to the frostline I'll hit large boulders and it will be a huge undertaking but I'm a little nervous about having the thing float.
This weekend, I cut the adjacent patio to make room for the oven. The patio is 4" thick, with no reinforcing (looks like the truck showed up before they had the mesh raised above the stone bed and they just poured the slab on top instead of embedding the meash), on only a few inches of fine crushed stone, yet it's been quite stable. This makes me a little less nervous about floating.
Any thoughts?
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