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Q: Expansion joints are provided if the length of concrete structures exceeds:
  • A. 10 m
  • B. 15 m
  • C. 35 m
  • D. 45 m
Correct Answer: Option D - According to IS 456 : 2000 Clause 27.2, Expansion joints are provided if the length of concrete structures exceeding 45m in length are designed with one or more expansion joints.
D. According to IS 456 : 2000 Clause 27.2, Expansion joints are provided if the length of concrete structures exceeding 45m in length are designed with one or more expansion joints.

Explanations:

According to IS 456 : 2000 Clause 27.2, Expansion joints are provided if the length of concrete structures exceeding 45m in length are designed with one or more expansion joints.