RCC STRUCTURES DESIGN QUIZ

A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

WL/P

WL/4P

WL/2P

WL/3P

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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

A cut-off wall

A rib

A key

All listed here

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A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds

25

10

20

15

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The spacing of transverse reinforcement of column is decided by the following consideration.

Sixteen times the diameter of the smallest longitudinal reinforcing rods in the column

All listed here

The least lateral dimension of the column

Forty-eight times the diameter of transverse reinforcement

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According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is

Four-fifth of the width of the slab

Three-fourth of the width of the slab

Two-third of the width of the slab

Half of the width of the slab

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Minimum spacing between horizontal parallel reinforcement of the same size should not be less than

3 diameters

2.5 diameters

One diameter

3.5 diameters

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Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at

Mid span

Every section

Quarter span

Supports

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In a simply supported slab, alternate bars are curtailed at

1/7th of the span

1/4th of the span

1/6th of the span

1/5th of the span

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If ‘W’ is the load on a circular slab of radius ‘R’, the maximum radial moment at the centre of the slab, is

5WR²/16

3WR²/16

2WR²/16

WR²/16

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The allowable tensile stress in mild steel stirrups, reinforced cement concrete, is

1400 kg/cm²

260 kg/cm²

230 kg/cm²

190 kg/cm²

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