A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is

RCC Structures Design
A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is

45

30

40

35

45

30

40

35

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RCC Structures Design
If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by

D = 0.00775 aP

D = 0.0775 aP

D = 0.775 Pa

D = 0.07775 aP

D = 0.00775 aP

D = 0.0775 aP

D = 0.775 Pa

D = 0.07775 aP

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RCC Structures Design
If the length of a combined footing for two columns l meters apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where x̅ is the distance of centre of gravity of column loads).

y = L/2 - (l + x̅)

y = L/2 - (l - x̅)

y = L - (l - x̅)

y = L/2 + (l - x̅)

y = L/2 - (l + x̅)

y = L/2 - (l - x̅)

y = L - (l - x̅)

y = L/2 + (l - x̅)

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RCC Structures Design
In testing a pile by load test, pile platform is loaded with one and half times the design load and a maximum settlement is noted. The load is gradually removed and the consequent rebound is measured. For a safe pile, the net settlement (i.e. total settlement minus rebound) per tonne of test load should not exceed

25 mm

10 mm

15 mm

20 mm

25 mm

10 mm

15 mm

20 mm

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RCC Structures Design
A circular slab subjected to external loading, deflects to form a

Ellipsoid

None of these

Semi-hemisphere

Paraboloid

Ellipsoid

None of these

Semi-hemisphere

Paraboloid

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

Radius of the column

Half the width of the panel

One-fourth the width of the panel

Diameter of the column

Radius of the column

Half the width of the panel

One-fourth the width of the panel

Diameter of the column

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RCC Structures Design

RCC Structures Design If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by

RCC Structures Design A circular slab subjected to external loading, deflects to form a

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

RCC Structures Design
If P kg/m² is the upward pressure on the slab of a plain concrete footing whose projection on either side of the wall is a cm, the depth of foundation D is given by

RCC Structures Design
A circular slab subjected to external loading, deflects to form a

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