A rectangular concrete beam of 250 mm wide and 600 mm deep is pre-stressed by means of four 10 mm diameter high tensile bars located at 200 mm from the soffit of the beam. If the effective stress in the wires is 500 N/mm2. What is maximum bending moment that can be applied to the section WITHOUT causing tension at soffit of the beam?

A rectangular concrete beam of 250 mm wide and 600 mm deep is pre-stre

1.	A rectangular concrete beam of 250 mm wide and 600 mm deep is pre-stressed by means of four 10 mm diameter high tensile bars located at 200 mm from the soffit of the beam. If the effective stress in the wires is 500 N/mm2. What is maximum bending moment that can be applied to the section WITHOUT causing tension at soffit of the beam?
A.	24.5 kNm
B.	26.5 kNm
C.	31.5 kNm
D.	38.5 kNm
Answer» D. 38.5 kNm

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