Civil Engineering :: RCC Structures Design
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After prestressing process is completed, a loss of stress is due to
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In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as
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The diameter of the column head support a flat slab, is generally kept
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The steel generally used in R.C.C. work, is
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Pick up the correct statement from the following:
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The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is
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If longitudinally spanning stairs are casted along with their landings, the maximum bending moment per metre width, is taken as
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If A is the sectional area of a prestressed rectangular beam provided with a tendon prestressed by a force P through its centroidal longitudinal axis, the compressive stress in concrete, is
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According to I.S.: 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than
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The self-weight of the footing, is
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For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed
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If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept
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. If Md and Mt are the maximum bending moments due to dead load and live load respectively and F is the total effective pressure, for a balanced design of a prestreseed concrete beam of steel, is
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The floor slab of a building is supported on reinforced cement floor beams. The ratio of the end and intermediate spans is kept
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If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a superload on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is
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Lapped splices in tensile reinforcement are generally not used for bars of size larger than
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An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam
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In a slab, the pitch of the main reinforcement should not exceed its effective depth
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The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.
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In a prestressed member it is advisable to use
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The ratio of the breadth to effective depth of a beam is kept
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Spacing of stirrups in a rectangular beam, is
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If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is
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. For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is
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A.
Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling |
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B.
Lateral reinforcement prevents the shearing of concrete on diagonal plane |
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C.
Lateral reinforcement stops breaking away of concrete cover, due to buckling |
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D.
Lateral reinforcement in R.C.C. columns, is kept not less than 5 mm diameter |
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E.
All the above. |