A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is
Options
A. 20 cm
B. 25 cm
C. 30 cm
D. 35 cm
E. 40 cm
Correct Answer
30 cm
RCC Structures Design problems
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1. Pick up the assumption for the design of a prestressed concrete member from the following :
Options
A. A transverse plane section remains a plane after bending
B. During deformation limits, Hook's law is equally applicable to concrete as well as to steel
C. Variation of stress in reinforcement due to changes in external loading is negligible
3. If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth (D) of the footing from punching shear consideration, is
5. If T and R are the tread and rise of a stair which carries a load w per square metre on slope, the corresponding load per square metre of the horizontal area, is
9. If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the prestressed beam is L, the upward uniform pressure will be
