Shallow footing design
Shallow footing design
(OP)
Typical spread footing with pedestal to grade. The building supplier provided the vertical and lateral loads. For design purposes can you reduce the lateral load applied at the pedestal height due to the constraint of structural fill and a slab on grade, or do you multiply the full lateral load by the height of pedestal and footing to determine the moment applied to the footer.






RE: Shallow footing design
RE: Shallow footing design
RE: Shallow footing design
For a competitively priced building, perhaps a small retail store, MikeE55's approach should be both satisfactory and cost effective.
www.SlideRuleEra.net
RE: Shallow footing design
RE: Shallow footing design
RE: Shallow footing design
RE: Shallow footing design
RE: Shallow footing design
RE: Shallow footing design
RE: Shallow footing design
Also, as others have noted above, if the floor is cut at sometime in the future, the hairpins could also be cut too.
As to the use of a vapor barrier, yes it reduces the coeff. of friction between the slab and the subgrade, however you could compensate with longer hairpins tied to the slab reinforcing. Check the calcs once to verify the difference.
RE: Shallow footing design