A tower crane is being climbed to an extension height of 6.0 m. The climb cycle procedure requires the operator to 'balance the crane' before jacking. What does 'balancing the crane' primarily mean in this context?

Question: A tower crane is being climbed to an extension height of 6.0 m. The climb cycle procedure requires the operator to 'balance the crane' before jacking. What does 'balancing the crane' primarily mean in this context?

Answer options: ✅ Positioning the counterweights and the trolley to equalize the moment from the jib and counter jib, creating a neutral or slightly nose-heavy condition.

• Leveling the crane's mast using the hydraulic jacks to ensure it is plumb.
• Orienting the jib directly over a structural tie-in point.
• Ensuring the crane's power supply is balanced across all phases.

Correct answer: Positioning the counterweights and the trolley to equalize the moment from the jib and counter jib, creating a neutral or slightly nose-heavy condition.

Explanation: During a climb cycle, balancing the crane is crucial. It means adjusting the counterweights and trolley position to achieve a neutral or slightly nose-heavy moment. This reduces stress on the climbing frame and mast during the jacking process, preventing a tail-heavy condition that could cause instability as per CSA Z248 climb procedures.