Tunnel Engineering

For highways, tunnelling is preferred to if the open cut exceeds:

  • A. 10 meters depth
  • B. 15 meters depth
  • C. 20 meters depth
  • D. 25 meters depth
Answer: Option B.
Explanation: 

IS 14665 gives details about elevators. It specifies the number, capacityof elevator and number of floors to be served.

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