If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:
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The percentage of minimum reinforcement of the gross sectional area in slabs, is
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If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width
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If ‘W’ is the uniformly distributed load on a circular slab of radius ‘R’ fixed at its ends, the maximum positive radial moment at its centre, is
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The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30° and 2000 kg respectively, the effective width of the stem at the bottom, 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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An R.C.C. column is treated as short column if its slenderness ratio is less than
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A ribbed slab is provided for
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The thickness of the topping of a ribbed slab, varies between
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The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than
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The load stress of a section can be reduced by
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The horizontal portion of a step in a stairs case, is known as
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An under-reinforced section means
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The live load to be considered for an accessible roof, is
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The live load to be considered for an inaccessible roof, is
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The Young's modulus of elasticity of steel, is
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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
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In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength
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The maximum shear stress (qmax) in a rectangular beam is
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A pre-stressed concrete member
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