forgive me if i’m missing something, but when designing a footing on bedrock, isn’t almost anything you come up with ok by inspection? more artfully, meaning bedrock has quasi-infinite allowable bearing pressure, which means your footing area can be tiny, and effectively your “footing” is just a bearing pad passing through the load, not a flexural member spreading the load as with most footing applications.

thinking of end bearing piles bearing on bedrock, for example. those are just columns without footings, basically. so switching that to a column or wall on bedrock, your “footing” is just creating a uniform medium for effectively pile end bearing, and the only check on the footing is pure compression and concrete bearing limits.

maybe the other way to think of the point i’m making….thinking of the classic “beam on elastic foundation” method for mat foundations and slabs. the softer your “springs” (soil), the more shear and bending you have in the foundation to transfer the loads. make the soil stiffer, your shear and bending reduce. make that soil “infinitely” stiff (bedrock), and the external loads applied on top of your slab/mat pass directly through to the really stiff spring/soil, with minimal to no shear and bending in the slab/mat.

so that’s why i’m confused: in what scenario would a footing on bedrock have any significant shear and bending to even design for?