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Q: As per IS 456 – 2000, no construction joints shall be allowed within_______below low water level for concrete work in a sea-water or exposed directly along the sea coast.
  • A. 400 mm
  • B. 500 mm
  • C. 650 mm
  • D. 600 mm
Correct Answer: Option D - As per IS 456 : 2000 (clause 8.2.8.3)- No construction joints shall be allowed within 600 mm below low water-level or within 600 mm of the upper and lower planes of wave action.
D. As per IS 456 : 2000 (clause 8.2.8.3)- No construction joints shall be allowed within 600 mm below low water-level or within 600 mm of the upper and lower planes of wave action.

Explanations:

As per IS 456 : 2000 (clause 8.2.8.3)- No construction joints shall be allowed within 600 mm below low water-level or within 600 mm of the upper and lower planes of wave action.