A simply supported beam (Span = 25 ) has a seetion as shown below with normal-weichs concrete compressive strength fc- 4000 psi (normal weight, and steel reinforcement,fy=40,000 psi  1- find the modulus of rupture of the concrete per ACI318-10 2- find gross section properties to calculate the crracking bending moment (Mcr) 3-check whether the cross section is over -or under -reinforced  4-caclculate the nominal flexural strength of the cross section (Mn)

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Composite Construction

Composite construction is the construction of structures in which two or more materials are used. Regarding structural engineering, composite construction is a construction where two materials are bound together in a technical manner such that both the materials act as a single unit to carry and transfer the load. The motives of composite construction are to increase the structural strength, make structures more aesthetic, and provide a sustainable environment.