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33-ft simple span slab

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I am pondering on using  8" composite slab (3" pre-tensioned plank with 5" topping) for a 33-ft simple span floor slab in a dormitory building.  The plank will be shored at mid span before topping. My only concern is the long-term deflection. Has any one had similar experience?
Thank you
Ben Z, P.E.