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RCC Structures Design

RCC Structures Design
The maximum ratio of span to depth of a slab simply supported and spanning in one direction, is

25
20
30
35

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RCC Structures Design
If d is the diameter of a bar, ft is allowable tensile stress and fb, is allowable bond stress, the bond length is given by

(π/4). (ft .d3/fb)
(π/4). (ft .d/fb)
ft .d/4fb
π ft .d²/fb

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

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RCC Structures Design
For a number of columns constructed in a rcjw, the type of foundation provided, is

Footing
Strip
Raft
Strap

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RCC Structures Design
A short column 20 cm × 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm² and 300 kg/cm², the Safe load on the column, should not exceed

4,120 kg
412,000 kg
41,200 kg
None of these

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RCC Structures Design
If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than

WL/10 (L - 2D/3)²
WL/12 (L - D/3)²
WL/12 (L - 2D/3)²
WL/10 (L + 2D/3)²

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