The structure below supports a service live load of 100 psf. The steel deck weight 1.8 psf. Assume a shored construction. The concrete weighs 145 lb/ft3 and the 28-day compressive strength of concrete is fe’ = 4000 psi. Due to shortage in formwork, the engineer decided to remove of the shores when the concrete strength reached 75% of it curing strength. Assuming that a composite behavior is achieved at this age, 4.1 Estimate the stress in the bottom flange of steel beam 4.2 Determine the capacity of the composite section M. Reinforced concrete 13″ slab 14″ Steel form deck III W18X86 Span = 30 ft
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