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RCC Structures Design

RCC Structures Design
For initial estimate for a beam design, the width is assumed

1/20th of span
1/30th of span
1/15th of span
1/25th of span

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RCC Structures Design
If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by

D = 0.775 Pa
D = 0.0775 aP
D = 0.07775 aP
D = 0.00775 aP

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

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RCC Structures Design
According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is

15 kg/cm²
10 kg/cm²
5 kg/cm²
20 kg/cm²

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RCC Structures Design
If diameter of a reinforcement bar is d, the anchorage value of the hook is

12d
8d
16d
4d

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RCC Structures Design
An R.C.C. beam of 25 cm width and 50 cm effective depth has a clear span of 6 meters and carries a U.D.L. of 3000 kg/m inclusive of its self weight. If the lever arm constant for the section is 0.865, the maximum intensity of shear stress, is

7.6 kg/cm²
21.5 kg/cm²
8.3 kg/cm²
21.5 kg/cm²

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