Crane Operator Certification Exam Prep · Question
A top-slewing tower crane has a rated free-standing height of 60 metres (measured from the lowest support to the slewing ring). If the total planned operational height of the crane is 120 metres, and the manufacturer's instructions state tie-ins are required every 30 metres after reaching the free-standing limit, how many tie-in connections are required?
The crane operates free-standing up to 60m. For the remaining 120m - 60m = 60m, tie-ins are required every 30m. Therefore, 60m / 30m = 2 tie-in connections are
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Question: A top-slewing tower crane has a rated free-standing height of 60 metres (measured from the lowest support to the slewing ring). If the total planned operational height of the crane is 120 metres, and the manufacturer's instructions state tie-ins are required every 30 metres after reaching the free-standing limit, how many tie-in connections are required?
Answer options: ✅ 2 tie-in connections.
- 3 tie-in connections.
- 1 tie-in connection.
- 4 tie-in connections.
Correct answer: 2 tie-in connections.
Explanation: The crane operates free-standing up to 60m. For the remaining 120m - 60m = 60m, tie-ins are required every 30m. Therefore, 60m / 30m = 2 tie-in connections are needed. This ensures the crane's stability as per CSA Z248 requirements for heights exceeding free-standing limits.
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Question explanations
- According to most Canadian provincial regulations, who is ultimately responsible for the safe operation of a c
- A crane's rated capacity decreases as the load radius:
- What is the minimum number of full wraps of wire rope that must remain on a hoist drum when the hook is in its
- Before setting up a mobile crane, what is the most important factor to assess regarding ground conditions?
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