1d (edited) • Equipment& Load Control Issues
Case Study 48: Double-Choke Lift with Uneven Sling Tension
Incident Overview
Formwork beams were lifted using a double-choke configuration where one sling failed to
tension correctly.
What Went Wrong
The lift continued despite visible imbalance and lack of intervention.
Key Lessons Learned
- Sling behaviour must be verified
- Uneven tension indicates instability
Safety Recommendations
Lifts must stop immediately if sling behaviour is abnormal.
●LOLER 1998 – Regulation 4 (Strength and stability); Regulation 8 (Safe system of work)
●PUWER 1998 – Regulation 4 (Suitability); Regulation 9 (Training and competence)
●BS 7121-1 – Slinging techniques; requirement for test lifts and verification of load sharing
●Industry good practice – Immediate stop required where abnormal sling behaviour is observed
Wolf Lifting Dynamics Limited – Safety HUB | Case Study 48
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Case Study 48: Double-Choke Lift with Uneven Sling Tension
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