Rigging & Lifting interview preparation
Slings and hardware, load calculations, lift plans, crane safety, signals and critical lifts. For Rigger, Banksman, Lifting Supervisor roles.
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The Rigging & Lifting interview book
About 40 pages, made for Banksman interviews.
- How to introduce yourself, with two sample answers
- The most-asked questions list
- 150 questions with model answers (Basic, Intermediate, Advanced)
- Full forms every candidate should know
- Interview-day checklist
- ⏳ Yours for life
A rigger inspects and selects the right lifting accessories, calculates or confirms the load weight and centre of gravity, attaches the slings and hardware correctly, protects slings from sharp edges, uses tag lines to control the load, gives or follows signals, keeps people out of the lift area, and lands and unhooks the load safely.
The WLL is the maximum load that a lifting accessory or piece of equipment is designed to lift in a straight vertical pull, set by the manufacturer. It is marked on the item. It is calculated from the minimum breaking load divided by the safety factor. You must never exceed the WLL, and it reduces with sling angles and certain hitches.
A safety factor is the ratio between the minimum breaking load and the WLL. Commonly wire rope slings have a factor of 5 to 1, alloy chain slings 4 to 1, and synthetic web and round slings 5 to 1 or 7 to 1 depending on the standard. For lifting people, higher factors apply.
Check the identification tag with WLL and certificate, then look for broken wires, kinks, birdcaging, crushing, corrosion, heat damage, core protrusion and reduced diameter. Check the eyes, ferrules and thimbles for cracks or damage. Any damaged sling must be removed from service and tagged.
Wire rope slings, alloy chain slings, synthetic web slings, synthetic round slings, and metal mesh slings. Each has different strengths: chain slings resist heat and rough handling, synthetic slings protect delicate surfaces and are light, and wire rope slings are strong and common for general lifting.
The vertical or straight hitch, the choker hitch, which wraps around the load and reduces capacity to about 75 to 80 percent, and the basket hitch, which cradles the load and can double the capacity when the legs are vertical. Multi-leg bridle hitches use two, three or four legs.
How the interview works
Sample questions
- What are the main duties of a rigger?
- What is the Working Load Limit (WLL)?
- What is the safety factor for wire rope, chain and synthetic slings?
- What are the duties of the person in charge of the lift?
- How do you calculate the sling leg tension in a two-leg lift?
- What do you include in a critical lift plan?
- Walk me through planning a 200-tonne critical lift from start to finish.
- How would you investigate a dropped load incident?
- How do you calculate load share in a tandem lift?