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RCC Structures Design

RCC Structures Design
An R.C.C. column is treated as short column if its slenderness ratio is less than

50
40
30
56

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RCC Structures Design
If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

(C - 1) mf - eE
(1 - C) mf - eE
(C - 1) mf + eE
(1 - C) mf + eE

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RCC Structures Design
If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm² and 1400 kg/cm² respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is

0.596 %
0.796 %
0.696 %
0.496 %

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RCC Structures Design
As per IS : 1343, total shrinkage for a pre-tensioned beam, is

3.0 × 10⁻²
3.0 × 10⁻⁵
3.5 × 10⁻⁵
3.0 × 10⁻³

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RCC Structures Design
If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is

Triangular
Square
Rectangular
Trapezoidal

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RCC Structures Design
The width of the rib of a T-beam, is generally kept between

1/7 to 1/3 of rib depth
1/3 to 2/3 of rib depth
1/2 to 3/4 of rib depth
1/3 to 1/2 of rib depth

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