Question: A composite beam is constructed using a precast prestressed concrete beam of dimensions 300 mm x 500 mm and a cast-in-situ concrete slab of thickness

A composite beam is constructed using a precast prestressed concrete beam of dimensions 300 mm x 500 mm and a cast-in-situ concrete slab of thickness 120 mm. If the effective span of the composite beam is 8m, what is the required amount of prestressing force and reinforcement for the precast beam?

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