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RCC Structures Design

RCC Structures Design
If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is

16 mm
14 mm
12 mm
10 mm

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RCC Structures Design
If C is creep coefficient, f is original pre-stress in concrete, m is modular ratio, E is Young's modulus of steel and e is shrinkage strain, the combined effect of creep and shrinkage is:

(C - 1) mf + eE
(1 - C) mf - eE
(1 - C) mf + eE
(C - 1) mf - eE

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

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RCC Structures Design
The effective width of a column strip of a flat slab, is

One-fourth the width of the panel
Half the width of the panel
Radius of the column
Diameter of the column

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

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RCC Structures Design
On piles, the drop must be at least

120 cm
123 cm
80 cm
124 cm

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