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RCC Structures Design

RCC Structures Design
A ribbed slab is provided for

Thermal insulation
Acoustic insulation
All of these
A plain ceiling

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RCC Structures Design
If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit volume and the angle of repose φ, the lateral intensity of pressure p2 is

wh (1 - tan φ)/(1 + tan φ)
wh (1 - cos φ)/(1 + sin φ)
wh (1 - sin φ)/(1 + sin φ)
w (1 - cos φ)/h (1 + sin φ)

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RCC Structures Design
If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by

0.6
0.5
0.7
0.4

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RCC Structures Design
An R.C.C beam of 25 cm width has a clear span of 5 metres and carries a U.D.L. of 2000 kg/m inclusive of its self weight. If the lever arm of the section is 45 cm., the beam is

Is safe with stirrups
Needs revision of the section
Safe in shear
Is safe with stirrups and inclined members

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RCC Structures Design
The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called

All listed here
Critical section
Balanced section
Economic section

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RCC Structures Design
A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm², the area of steel required, is

17 cm²
16 cm²
15 cm²
14 cm²

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