A rectangular beam 350 mm wide is to be designed for an ultimate moment of 750 kN·m with f’c = 28 MPa and fy = 415 MPa.  The effective depth of the tension bars is 500 mm and 70 mm for compression bars. a.  Determine the depth of the stress block if the tensile strain is 0.005 when the concrete crushes at a strain of 0.003.  = ____ mm (one decimal place) b.  Determine the total amount of tension reinforcement for the given condition above. = ___ sq.mm (whole number) c.  Determine the amount of compression reinforcement required. = ___ sq.mm (whole number)

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Pressure and Stress