A project requires a tower crane to operate with a maximum 180-degree slewing limit due to adjacent live railway tracks. The crane's control system offers both 'soft' (operator override possible) and 'hard' (physical stop) slewing limits. Which type of limit should be used for safety in this scenario, as per safety regulations?

Question: A project requires a tower crane to operate with a maximum 180-degree slewing limit due to adjacent live railway tracks. The crane's control system offers both 'soft' (operator override possible) and 'hard' (physical stop) slewing limits. Which type of limit should be used for safety in this scenario, as per safety regulations?

Answer options: ✅ A 'hard' slewing limit, mechanically or electrically preventing movement beyond the set boundary.

• A 'soft' slewing limit, with an audible and visual alarm if the boundary is approached.
• A combination of both, with a soft limit for warning and a hard limit for absolute prevention.
• Neither, as long as a dedicated spotter is assigned to monitor the railway corridor.

Correct answer: A 'hard' slewing limit, mechanically or electrically preventing movement beyond the set boundary.

Explanation: When working near critical hazards like active railway tracks, a 'hard' slewing limit is essential. This type of limit physically or electronically prevents any part of the crane from entering the restricted zone, providing the highest level of safety and preventing accidental intrusion, as required by OHS regulations when physical barriers are impractical.