Concrete Beam on Elevator Shaft Corner 1

[KootK]

I've got a concrete transfer beam that bears on an elevator shaft wall right at one of the shaft corners. Other than bearing stress, what should one check in this situation? Treated as a ginormous, U-shaped column with an eccentric load, it obviously works just fine. Treated as a localized (~300x900) column, that column would would be fully braced in each orthogonal direction and therefore incapable of buckling.

I'm feeling the urge to throw a pilaster in but I'm having trouble justifying that decision to myself.

 

[JAE]

I would check an "L" shaped column using a set distance away from the corner each way. I think your concrete code should offer a distance that you can use in walls for concentrated walls.

Here in the US, under ACI 318, if the wall requires more than 1% reinforcement (1% of gross concrete area) then the reinforcement must be enclosed by lateral ties as required for typical concrete columns.