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RCC Structures Design

RCC Structures Design
The maximum ratio of span to depth of a cantilever slab, is

12
8
10
16

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RCC Structures Design
As per I.S. 456 - 1978, the pH value of water shall be

Less than 6
Equal to 6
Equal to 7
Not less than 6

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

12 mm
6 mm
22 mm
20 mm

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RCC Structures Design
If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by

(5/6) (r²/1 + r⁴) M
(5/6) (r²/1 + r³) M
(5/6) (r²/1 + r²) M
(5/6) (r/1 + r²) M

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RCC Structures Design
The advantage of reinforced concrete, is due to

Fire-resisting and durability
All listed here
Economy because of less maintenance cost
Monolithic character

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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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