Tunnel Engineering

Ribs are used for strengthening and stiffening the liner plate for tunnels of diameter greater than_____.

  • A. 2 m
  • B. 3 m
  • C. 4 m
  • D. 5 m
Answer: Option B.

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

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