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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/10√Q
M/100Q
√(M/100Q)
√(M/Q)

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RCC Structures Design
‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in 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
The minimum number of main steel bars provided in R.C.C.

Rectangular columns is 4
Octagonal columns is 8
All listed here
Circular columns is 6

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RCC Structures Design
Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than

One diameter of thicker bar
One diameter of thinner bar
None of these
Twice the diameter of thinner bar

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RCC Structures Design
The diameter of main bars in R.C.C. columns, shall not be less than

10 mm
12 mm
11 mm
15 mm

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RCC Structures Design
If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and σc are the modular ratio and maximum stress in the configuration of concrete, the strength of column is

σc(A - Asc) + m σcAsc
σc[A + (m - 1)Asc]
σcAc + m σcAsc
All listed here

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