Thickened slab calculation?
Thickened slab calculation?
(OP)
Please guide me to a calculation method for a thickened slab on grade beneath a load bearing wall (interior of or edge of slab).
thanks
thanks
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Thickened slab calculation?
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RE: Thickened slab calculation?
RE: Thickened slab calculation?
Best regards,
BA
RE: Thickened slab calculation?
RE: Thickened slab calculation?
DaveAtkins
RE: Thickened slab calculation?
I thought I was overthinking this, which is still probable, but for all of the reasons above, I have not been able to see the advantages or design procedure that would result in a little thickened slab/footing, other than some depth for anchor bolts. It seems like everyone of these would have to crack at the transition to slab. And yes, the prescriptive PCA gives a really wide footing. Why are there so many of these out there? Or are they based upon a punching shear calculation?
RE: Thickened slab calculation?
RE: Thickened slab calculation?
RE: Thickened slab calculation?
I think most engineers design them incorrectly. But they don't fail, because as JAE mentioned, once cracks form parallel to the wall on each side, the load goes directly into the soil.
DaveAtkins
RE: Thickened slab calculation?
You must also consider scour/undermining, so the thickened section should bear at least 12 inches below grade; however, that makes for a 16-inch deep section, tapering to 4 inches at the slab.
RE: Thickened slab calculation?
This is produced by the army and air force.
Pages 11-13 have some charts and appendix B shows a calculation example.
Has helped me justify additional loads on slabs like non-bearing masonry walls, etc.
RE: Thickened slab calculation?
RE: Thickened slab calculation?