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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
Zero
WR²/16
2WR²/16

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RCC Structures Design
In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called

Critical section
Economic section
Under-reinforced section
Over reinforced section

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RCC Structures Design
A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is

WL/P
WL/2P
WL/4P
WL/3P

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RCC Structures Design
The load stress of a section can be reduced by

Increasing the total perimeter of bars
Replacing smaller bars by greater number of greater bars
Replacing larger bars by greater number of small bars
Decreasing the lever arm

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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 = 0.0775 a
D = 0.775 a²
D = 0.775 a

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RCC Structures Design
The transverse reinforcements provided at right angles to the main reinforcement

Resist the shrinkage stress
Resist the temperature stresses
All of these
Distribute the load

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