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RCC Structures Design

RCC Structures Design
If the maximum bending moment of a simply supported slab is M Kg.cm, the effective depth of the slab is (where Q is M.R. factor)

M/100Q
√(M/100Q)
M/10√Q
√(M/Q)

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RCC Structures Design
If the size of a column is reduced above the floor, the main bars of the columns, are

All of the listed here
Stopped just below the floor level and separate lap bars provided
Bent inward at the floor level
Continued up

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

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

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RCC Structures Design
If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be

8hl/p²
8hl/p
8hp/l²
8hp/l

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

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