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The Double Tee To Inverted Tee Beam Connection-B is very similar to the detail we use for underground parking garages on apartment buildings. Quite often it is a design with double tees for a center span supporting the hallway walls above and hollow-core planks for the outside spans.

I have also done a number of these inside buildings as you describe.

For structures of this type that I have been involved in, rebar has been cast in the top of the cast in place walls and bent over the top of the precast roof. Then a topping is placed over the precast roof. This serves to tie the roof to the walls and provide additional load to resist uplift.

Our standard practice for a cantilever of that size is to provide prestressing strand at the top of the hollowcore section to counteract the prestressing strand in the bottom of the section. We do not debond strand in our sections due to the difficulty in getting the plastic sheath for...

I am looking for a resource that covers permanent bracing of truss systems due to wind/seismic loading. I have read through the tech notes from Light Gauge Steel Engineers Association but they seem to only cover bracing for the forces in the truss members. Any assistance in this matter would...