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RCC Structures Design

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

15 mm
12 mm
11 mm
10 mm

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RCC Structures Design
The ratio of the breadth to effective depth of a beam is kept

0.25
0.75
0.7
0.5

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RCC Structures Design
A foundation rests on

Base of the foundation
Sub-grade
Both B and C
Foundation soil

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RCC Structures Design
‘P’ is the pre-stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The minimum stress ‘f’ on the beam subjected to a maximum bending moment ‘M’ is

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

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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

8hp/l
8hl/p
8hp/l²
8hl/p²

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RCC Structures Design
If p1 is the vertical intensity of pressure at a depth h on a block of earth weighing w per unit volume and the angle of repose φ, the lateral intensity of pressure p2 is

wh (1 - sin φ)/(1 + sin φ)
wh (1 - tan φ)/(1 + tan φ)
wh (1 - cos φ)/(1 + sin φ)
w (1 - cos φ)/h (1 + sin φ)

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