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RCC Structures Design

RCC Structures Design
The steel generally used in R.C.C. work, is

Mild steel
High tension steel
High carbon steel
Stainless

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RCC Structures Design
If d and n are the effective depth and depth of the neutral axis respectively of a singly reinforced beam, the lever arm of the beam, is

d - n/3
d + n/3
d
n

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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

39 cm
37 cm
38 cm
40 cm

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RCC Structures Design
Cantilever retaining walls can safely be used for a height not more than

6 m
5 m
4 m
3 m

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RCC Structures Design
If the tendon is placed at an eccentricity e below the centroidal axis of the longitudinal axis of a rectangular beam (sectional modulus Z and stressed load P in tendon) the stress at the extreme top edge

Is increased by PZ/e
Is increased by Pe/Z
Remains unchanged
Is decreased by Pe/Z

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RCC Structures Design
The horizontal portion of a step in a stairs case, is known as

Rise
Flight
Tread
Winder

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