Live load reduction per ASCE 7 uses the Kll factor. The item is question is a double tee used in an office building, with a 3.5" (average) thickness topping slab . I would use Kll = 1.0 for this double tee. The original calcs used Kll=2.0. This seems optimistic to me, but is it common in the precast industry to use Kll=2.0?
I don't consider it an Interior Beam, but I could see some making that argument.
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