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Q: According to the recommendations of IS : 456-1978, the expansion joints
  • A. are provided where plane changes abruptly
  • B. are provided to ensure minimum resistance
  • C. are supported on separate columns
  • D. All option are correct
Correct Answer: Option D - Expansion joints are provided if there is considerable difference in the loading in two parts of the building or if there is an abrupt change in shape and plan of the building. As per IS - 456-2000 structure exceeding 45m in length are designed with one or more expansion joint. Expansion joint shall be so provided that the necessary movement occurs with a minimum resistant at joint. The structures adjacent to joint should be preferably supported on separate columns. Reinforcement shall not extend across the joint.
D. Expansion joints are provided if there is considerable difference in the loading in two parts of the building or if there is an abrupt change in shape and plan of the building. As per IS - 456-2000 structure exceeding 45m in length are designed with one or more expansion joint. Expansion joint shall be so provided that the necessary movement occurs with a minimum resistant at joint. The structures adjacent to joint should be preferably supported on separate columns. Reinforcement shall not extend across the joint.

Explanations:

Expansion joints are provided if there is considerable difference in the loading in two parts of the building or if there is an abrupt change in shape and plan of the building. As per IS - 456-2000 structure exceeding 45m in length are designed with one or more expansion joint. Expansion joint shall be so provided that the necessary movement occurs with a minimum resistant at joint. The structures adjacent to joint should be preferably supported on separate columns. Reinforcement shall not extend across the joint.