During a blind lift on a construction site, the tower crane operator momentarily loses radio contact with the signal person. The load is currently suspended but not landed. What is the immediate action the tower crane operator must take according to CSA Z150.1-16 and typical site procedures?

Question: During a blind lift on a construction site, the tower crane operator momentarily loses radio contact with the signal person. The load is currently suspended but not landed. What is the immediate action the tower crane operator must take according to CSA Z150.1-16 and typical site procedures?

Answer options:

• Continue hoisting slowly until visual contact or radio contact is re-established.
• Lower the load to the ground immediately.
• Engage the crane's emergency stop and await instruction. ✅ Stop all crane functions and hold the load in place until communication is restored.

Correct answer: Stop all crane functions and hold the load in place until communication is restored.

Explanation: When communication is lost during a lift, especially a blind lift where visual contact is impossible, the crane operator must immediately stop all crane movements and hold the load in place until communication is re-established. This is a critical safety protocol to prevent uncontrolled movement or accidents.