one way slabs cast mono w/ beams

- The detail to the right is typcial and what I would do.

- If, by interaction stresses, you mean bi-axial compression in the concrete, then, no, nobody checks that. It's probably beneficial by way of confinement etc anyways.

- Technically you should check shear friction. That said, with the right side detail and small diameter stirrups, I no longer bother. Two reasons for that:

1) I've checked a few and, baring unusual loading situations, it's never a problem.
2) You can count the same stirrups for shear and shear friction. In this sense, the problem nearly becomes self satisfying.
3) I've seen some literature on two pour bridge girders that suggests that you're probably fine for interface shear even with no stirrups at all crossing.

The first image shows the top bars depressed below the slab which is not correct for a Tee Beam. The second image shows a Tee Beam with top bars near the top where they should be. No special check is made for stress across the intersection.



BA