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RCC Structures Design

RCC Structures Design
The weight of a foundation is assumed as

12% of wall weight
10% of wall weight
5% of wall weight
7% of wall weight

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

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RCC Structures Design
If p₁ and p₂ are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is

[(p₁ + p₂)/2] h
(p₁ - p₂) ⅔h
[(p₁ - p₂)/2] h
[(p₁ + p₂)/4] h

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RCC Structures Design
For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is

0.8
0.7
0.9
0.6

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RCC Structures Design
The minimum thickness of a flat slab is taken

L/36 for interior panels without drop
L/32 for end panels without drops
L/36 for end panels without drops
All listed here

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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

38 d
28 d
48 d
58 d

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