Staging and Rigging Operations
Core concepts
Staging and rigging is high-risk work. You must understand load calculations, working load limits (WLL), safety factors, and the difference between static and dynamic loads. Know the main hardware: truss, chain hoists (motors), shackles, spansets, wire rope, and pick points. Rigging must be designed and checked by competent people, and venues have certified rigging points with stated limits.
Safe systems of work
High-risk construction work (including some rigging) requires a safe work method statement (SWMS). Working at height demands fall prevention - harnesses, anchor points, and exclusion zones below. Never stand under a suspended load. Hoists must be inspected, tagged, and operated by trained personnel.
Load distribution
Understand how weight distributes across multiple pick points and why uneven loading is dangerous. Dynamic loads (movement, wind, audience) exceed static loads. Redundancy - secondary safeties - protects against single-point failure.
Traps
Questions often test whether you know that the venue's certified point limits override what the truss can hold. Another trap is confusing WLL with breaking strength (breaking strength = WLL × safety factor). Beware options that allow unqualified staff to make rigging decisions.
Worked example
A truss carries 400 kg of fixtures and weighs 100 kg. Across four evenly loaded points, each carries about 125 kg static - but dynamic factors and hardware weight mean you must check each point's rated capacity, not just divide. If any point exceeds its rating, redesign the plot.
Rule of thumb
Never exceed the lowest-rated component in the system, and always work to the venue's certified limits.