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

40

35

45

30

40

35

45

30

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RCC Structures Design
‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in the beam, subjected to a maximum bending moment ‘M’, is

f = (P/'+ (Z/M)

f = (A/P) + (M/Z)

f = (P/A) + (M/6Z)

f = (P/A) + (M/Z)

f = (P/'+ (Z/M)

f = (A/P) + (M/Z)

f = (P/A) + (M/6Z)

f = (P/A) + (M/Z)

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RCC Structures Design
As per IS : 456, the reinforcement in a column should not be less than

0.6% and not more than 6% of cross-sectional area

0.7% and not more than 7% of cross-sectional area

0.8% and not more than 8% of cross-sectional area

0.5% and not more than 5% of cross-sectional area

0.6% and not more than 6% of cross-sectional area

0.7% and not more than 7% of cross-sectional area

0.8% and not more than 8% of cross-sectional area

0.5% and not more than 5% of cross-sectional area

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RCC Structures Design
In a pre-stressed member it is advisable to use

Low strength concrete but high tensile steel

Low strength concrete only

High strength concrete only

High strength concrete and high tensile steel

Low strength concrete but high tensile steel

Low strength concrete only

High strength concrete only

High strength concrete and high tensile steel

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RCC Structures Design
The maximum diameter of a bar used in a ribbed slab, is

20 mm

22 mm

12 mm

6 mm

20 mm

22 mm

12 mm

6 mm

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RCC Structures Design
As the percentage of steel increases

Lever arm decreases

Lever arm increases

Depth of neutral axis increases

Depth of neutral axis decreases

Lever arm decreases

Lever arm increases

Depth of neutral axis increases

Depth of neutral axis decreases

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RCC Structures Design

RCC Structures Design ‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in the beam, subjected to a maximum bending moment ‘M’, is

RCC Structures Design As per IS : 456, the reinforcement in a column should not be less than

RCC Structures Design In a pre-stressed member it is advisable to use

RCC Structures Design The maximum diameter of a bar used in a ribbed slab, is

RCC Structures Design As the percentage of steel increases

RCC Structures Design
‘P’ is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is ‘A’ and sectional modulus is ‘Z’. The maximum stress ‘f’ in the beam, subjected to a maximum bending moment ‘M’, is

RCC Structures Design
As per IS : 456, the reinforcement in a column should not be less than

RCC Structures Design
In a pre-stressed member it is advisable to use

RCC Structures Design
The maximum diameter of a bar used in a ribbed slab, is

RCC Structures Design
As the percentage of steel increases