Shear Walls & Cazaly Hangers  

Hi everyone,

I am exploring the possibility of removing seating angles on a wall and instead have the precast flooring (rib & timber) span directly on the walls (as shown in the crude mark-up attached).

for argument sake if we assume the annuls of the SHS is filled with concrete, is the shear strength of the wall affected?

I can justify the strength by using a strut & tie truss model by dimensioning the truss members to miss the hangers (I.E. assuming the wall has small penetrations which match the Cazaly hangers) but I’m wondering if this is too simplistic? are we still in line with intent of the concrete code? Would I be able to justify nominally ductile loads? are the curvature checks I would do as if it was a normal wall still appropriate. 

I am thinking that encasement of the Cazaly hangers doesn’t restrain the the rib against rotation due to it’s small depth.

Has anyone used a similar detail before? Any thoughts or information would be greatly appreciated. 

Thanks,

P