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RCC Structures Design

RCC Structures Design
On piles, the drop must be at least

123 cm
124 cm
120 cm
80 cm

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RCC Structures Design
The width of the flange of a L-beam, should be less than

Least of the above
Breadth of the rib + half clear distance between ribs
One-sixth of the effective span
Breadth of the rib + four times thickness of the slab

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RCC Structures Design
If the permissible compressive stress for a concrete in bending is C kg/m², the modular ratio is

2300/2C
2800/C
2800/C²
2800/3C

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RCC Structures Design
In a pre-stressed beam carrying an external load W with a bent tendon is having angle of inclination ? and pre-stressed load P. The net downward load at the centre is

W - P sin θ
W - 2P cos θ
W - 2P sin θ
W - P cos θ

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RCC Structures Design
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

Is safe in shear
Needs revision of section
Is safe with stirrups
Is safe with stirrups and inclined bars

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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

37 cm
39 cm
38 cm
40 cm

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