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What is the adoptable maximum spacing between vertical stirrups in an RCC beam of the rectangular cross-section having an effective depth of 300 mm?
- a)300 mm
- b)275 mm
- c)250 mm
- d)225 mm
Correct answer is option 'D'. Can you explain this answer?
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What is the adoptable maximum spacing between vertical stirrups in an...
Spacing between vertical stirrups should be a minimum of
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(- 0.75d = 0.75 × 300)
(= 225 mm,)
(and = - 300 mm)
So adaptable maximum spacing is 225 mm.
Hence, the correct option is (D)
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What is the adoptable maximum spacing between vertical stirrups in an...
Adoptable maximum spacing between vertical stirrups in an RCC beam of the rectangular cross-section having an effective depth of 300 mm is 225 mm.
Explanation:
- Effective depth: The distance between the centroid of the tension reinforcement and the compression face of the beam.
- RCC beam is reinforced with steel bars in the tension zone to resist the tensile stresses.
- Vertical stirrups are provided in the beam to prevent the diagonal cracks from spreading and to hold the main reinforcement in position.
- The maximum spacing between vertical stirrups is limited to prevent the diagonal cracks from opening up and to ensure the proper distribution of the shear forces.
- As per IS 456:2000, the maximum spacing between vertical stirrups in RCC beams should not exceed d/2 or 300 mm, whichever is less.
- Here, effective depth (d) = 300 mm.
- Therefore, the maximum spacing between vertical stirrups = d/2 = 300/2 = 150 mm.
- However, it is recommended to adopt a minimum spacing of 2d or 50 mm, whichever is more, to ensure adequate confinement of the concrete.
- Hence, the adoptable maximum spacing between vertical stirrups in the given RCC beam = 225 mm (midway between the maximum and minimum limits).
Therefore, option (d) 225 mm is the correct answer.
Explanation:
- Effective depth: The distance between the centroid of the tension reinforcement and the compression face of the beam.
- RCC beam is reinforced with steel bars in the tension zone to resist the tensile stresses.
- Vertical stirrups are provided in the beam to prevent the diagonal cracks from spreading and to hold the main reinforcement in position.
- The maximum spacing between vertical stirrups is limited to prevent the diagonal cracks from opening up and to ensure the proper distribution of the shear forces.
- As per IS 456:2000, the maximum spacing between vertical stirrups in RCC beams should not exceed d/2 or 300 mm, whichever is less.
- Here, effective depth (d) = 300 mm.
- Therefore, the maximum spacing between vertical stirrups = d/2 = 300/2 = 150 mm.
- However, it is recommended to adopt a minimum spacing of 2d or 50 mm, whichever is more, to ensure adequate confinement of the concrete.
- Hence, the adoptable maximum spacing between vertical stirrups in the given RCC beam = 225 mm (midway between the maximum and minimum limits).
Therefore, option (d) 225 mm is the correct answer.
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What is the adoptable maximum spacing between vertical stirrups in an RCC beam of the rectangular cross-section having an effective depth of 300 mm?a)300 mmb)275 mmc)250 mmd)225 mmCorrect answer is option 'D'. Can you explain this answer?
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