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RCC Structures Design

RCC Structures Design
If W is the load on a circular slab of radius R, the maximum circumferential moment at the centre of the slab, is

3WR²/16
WR²/16
Zero
2WR²/16

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RCC Structures Design
An R.C.C. column of 30 cm diameter is reinforced with 6 bars 12 mm φ placed symmetrically along the circumference. If it carries a load of 40,000 kg axially, the stress is

100 kg/cm²
49.9 kg/cm²
175 kg/cm²
250 kg/cm²

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RCC Structures Design
To ensure that the hogging bending moment at two points of suspension of a pile of length L equals the sagging moment at its centre, the distances of the points of suspension from either end, is

0.107 L
0.307 L
0.407 L
0.207 L

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RCC Structures Design
If the bearing capacity of soil is 10 tonnes/cm² and the projection of plain concrete footing from walls, is a cm, the depth D of footing is

D = 0.775 √a
D = 0.775 a²
D = 0.775 a
D = 0.0775 a

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RCC Structures Design
A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n?. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is

Atft (d - n/3)
½ n₁ (1 - n₁/3) cbd²
bn (fc/2) (d - n/3)
All listed here

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

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