RCC Structures Design Questions

• Piles are usually driven by
• The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or
• The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is
• If the shear stress in a R.C.C. beam is
• In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
• P is the prestressed force applied to the tendon of a rectangular prestressed beam whose area of cross section is A and sectional modulus is Z. The maximum stress f in the beam, subjected to a maximum bending moment M, is
• A circular slab subjected to external loading, deflects to form a
• The Total pressure on the vertical face of a retaining wall of height h exerted by the retained earth weighing w per unit volume having an angle of surcharge α°, is :
• If Sb, is the average bond stress on a bar of diameter d subjected to maximum stress t, the length of the embedment l is given by
• In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength
• The live load to be considered for an accessible roof, is
• The minimum clear cover for R.C.C. columns shall be
• The thickness of the flange of a Tee beam of a ribbed slab is assumed as
• On piles, the drop must be at least
• A flat slab is supported
• If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is
• If jd is the lever arm and ΣO is the total perimeter of reinformcement of an R.C.C. beam, the bond stress at the section having Q shear force, is
• A raft foundation is provided if its area exceeds the plan area of the building by
• Though the effective depth of a T-beam is the distance between the top compression edge to the centre of the tensile reinforcement, for heavy loads, it is taken as
• A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is