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RCC Structures Design

RCC Structures Design
An R.C.C. beam not provided with shear reinforcement may develop cracks in its bottom inclined roughly to the horizontal at

25°
45°
35°
55°

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RCC Structures Design
A ribbed slab is provided for

Acoustic insulation
A plain ceiling
Thermal insulation
All of these

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RCC Structures Design
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

Kx (1 + x/l) + bw
All listed here
K/x (1 + x/d) + bw
Kx (1 - x/l) + bw

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RCC Structures Design
If permissible working stresses in steel and concrete are respectively 1400 kg/cm² and 80 kg/cm² and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is

39 cm
38 cm
37 cm
40 cm

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RCC Structures Design
In a simply supported slab, alternate bars are curtailed at

1/4th of the span
1/5th of the span
1/6th of the span
1/7th of the span

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RCC Structures Design
For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed

10
20
15
25

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