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RCC Structures Design

RCC Structures Design
The weight of reinforced concrete, is generally taken as

2500 kg/m³
2400 kg/m³
2300 kg/m³
2200 kg/m³

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RCC Structures Design
For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is

0.6
0.7
0.9
0.8

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RCC Structures Design
If the average bending stress is 6 kg/cm² for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is

58 d
48 d
28 d
38 d

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RCC Structures Design
If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is

Kx (1 - x/l) + bw
All listed here
Kx (1 + x/l) + bw
K/x (1 + x/d) + bw

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RCC Structures Design
As the percentage of steel increases

Lever arm decreases
Depth of neutral axis decreases
Depth of neutral axis increases
Lever arm increases

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RCC Structures Design
A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is

35
40
30
45

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