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RCC Structures Design

RCC Structures Design
The maximum diameter of a bar used in a ribbed slab, is

22 mm
20 mm
6 mm
12 mm

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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

2800/C²
2300/2C
2800/C
2800/3C

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RCC Structures Design
With usual notations the depth of the neutral axis of a balanced section, is given by

t/mc = (d - n)/n
mc/t = (d - n)/n
mc/t = n/(d - n)
t/mc = (d + n)/n

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RCC Structures Design
To ensure uniform pressure distribution, the thickness of the foundation, is

Kept uniform throughout
Decreased gradually towards the edge
Increased gradually towards the edge
Kept zero at the edge

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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

0.496 %
0.796 %
0.696 %
0.596 %

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RCC Structures Design
The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm² and 250 kg/cm² respectively. If m = 15, the depth of its neutral axis is

25 cm
30 cm
35 cm
20 cm

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