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RCC Structures Design

RCC Structures Design
If the length of an intermediate span of a continuous slab is 5 m, the length of the end span is kept

4.7 m
4.0 m
4.1 m
4.5 m

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RCC Structures Design
The modular ratio ‘m’ of a concrete whose permissible compressive stress is ‘C’, may be obtained from the equation.

m = 3500/3C
m = 700/3C
m = 1400/3C
m = 2800/3C

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RCC Structures Design
The width of the flange of a L-beam, should be less than

Breadth of the rib + four times thickness of the slab
Breadth of the rib + half clear distance between ribs
Least of the above
One-sixth of the effective span

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RCC Structures Design
‘P’ is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The minimum stress ‘f’ on the beam subjected to a maximum bending moment ‘M’ is

f = (P/A) - (M/Z)
f = (P/'- (Z/M)
f = (A/P) - (M/Z)
f = (P/A) - (M/6Z)

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RCC Structures Design
An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encased with the floor of a hall 12 meters by 7 meters, is spaced at 3 meters from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is

236 cm
176 cm
300 cm
233 cm

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RCC Structures Design
If permissible working stresses in steel and concrete are respectively 1400 kg/cm² and 80 kg/cm² and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is

40 cm
39 cm
37 cm
38 cm

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