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RCC Structures Design

RCC Structures Design
The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of

10 mm
25 mm
15 mm
20 mm

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RCC Structures Design
The diameter of longitudinal bars of a column should never be less than

10 mm
12 mm
8 mm
6 mm

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RCC Structures Design
Top bars are extended to the projecting parts of the combined footing of two columns L distance apart for a distance of

0.1 L from the centre edge of column
0.1 L from the outer edge of column
One-fourth the distance of projection
Half the distance of projection

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RCC Structures Design
A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is

35
40
30
45

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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

38 cm
40 cm
37 cm
39 cm

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RCC Structures Design
In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength

200 kg/cm²
300 kg/cm²
100 kg/cm²
400 kg/cm²

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