RCC Structures Design Questions

• The maximum diameter of a bar used in a ribbed slab, is
• If bending moment is M, shear force is F effecive depth is d, lever arm is la area of reinforcement is As and sum of the circumferences of main reinforcement is 0, the bond stress based on working stress method, is
• A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is
• A T-beam behaves as a rectangular beam of a width equal to its flange if its neutral axis
• The radius of a bar bend to form a hook, should not be less than
• The length of the straight portion of a bar beyond the end of the hook, should be at least
• The thickness of the topping of a ribbed slab, varies between
• With usual notations the depth of the neutral axis of a balanced section, is given by
• In a singly reinforced beam, the effective depth is measured from its compression edge to
• [A + (m - 1)ASC] known as equivalent concrete area of R.C.C. is given by
• Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to
• A simply supported beam , 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is
• Pick up the true statement from the following:
• If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is
• If a rectangular prestressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be
• If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by
• If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is
• If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than
• For stairs spanning horizontally, the minimum waist provided is
• The toe projection of foundation slabs is taken