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RCC Structures Design

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

4 m
3 m
5 m
6 m

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RCC Structures Design
If Sb, is the average bond stress on a bar of diameter ‘d’ subjected to maximum stress ‘t’, the length of the embedment ‘l’ is given by

l = dt/Sb
l = dt/2Sb
l = dt/3Sb
l = dt/4Sb

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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
d - n/3
d + n/3
n

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RCC Structures Design
In a pre-stressed member it is advisable to use

High strength concrete only
Low strength concrete but high tensile steel
High strength concrete and high tensile steel
Low strength concrete only

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RCC Structures Design
If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be.

Parabolic with convexity downward
Straight below centroidal axis
Parabolic with convexity upward
Straight above centroidal axis

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RCC Structures Design
If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be

20 cm
15 cm
5 cm
10 cm

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