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basic rigging
| Term | Definition |
|---|---|
| Block & Tackle | a simple rope-and-pulley system used to lift loads |
| Competent Person | A person who is capable of identifying existing and predictable hazards in the surroundings or working conditions which are unsanitary, hazardous, or dangerous to employees, and who has authorization to take prompt corrective measures to eliminate them. |
| Core | Center support member of a wire rope around which the strands are laid |
| Hitch | The rigging configuration by which a sling connects the load to the hoist hook. The three basic types of hitches are vertical, choker, and basket |
| Hoist | A device that applies mechanical force for lifting or lowering a load |
| Lifting Clamp | A device used to move loads such as steel plates or concrete panels without the use of slings |
| Load Control | The safe and efficient practice of load manipulation, using proper communication and handling techniques |
| Load Stress | The strain or tension applied on the rigging by the weight of the suspended load |
| Master Link | The main connection fitting for chain slings |
| Rated Capacity | The maximum load weight a sling or piece of hardware or equipment can hold or lift. Also called lifting capacity, working capacity, working load limit (WLL), and safe working load (SWL). |
| Rejection Criteria | Standards, rules, or tests on which a decision can be based to remove an object or device from service because it is no longer safe |
| Rigging Hook | an item of rigging hardware used to attach a sling to a load |
| Shackle | Coupling device used in an appropriate lifting apparatus to connect the rope to eye fitting, hooks, or other connectors |
| Sling | Wire rope, alloy steel chain, metal mesh fabric, synthetic rope, synthetic webbing, or jacketed synthetic continuous loop fibers made into forms, with or without end fittings, used to handle loads. |
| Sling Legs | the parts of the sling that reach from the attachment device around the object being lifted |
| Sling Reach | A measure taken from the master link of the sling, where it bears weight, to either the end fitting of the sling or the lowest point on the basket. |
| Strand | A group of wires wound, or laid, around a center wire, or core. Strands are laid around a supporting core to form a rope |
| Tag line | Rope that runs from the load to the ground. Riggers hold on to tag lines to keep a load from swinging or spinning during the lift. |
| Tattle-Tail | cord attached to the strands of an endless loop sling. it protrudes from the jacket. a tattle-tail is used to determine if an endless sling has been stretched or overloaded |
| Warning Yarn | A component of the sling that shows the rigger whether the sling has suffered too much damage to be used. |
| Wire Rope | A rope made from steel wires that are formed into strands and them laid around a supporting core to form a complete rope, sometimes called a cable |
| Qualified Person | A person who, by possession of a recognized degree, certificate, or professional standing, or by extensive knowledge, training, and experience, has demonstrated the ability to solve or prevent problems relating to a certain subject, work, or project. |
Created by:
wthompson79