Lifting Gear
Crane lifting gear or tackle refers to the wide variety of equipment and accessories used to securely attach a load to a crane’s hook, enabling the safe and efficient hoisting and movement of heavy objects. This crucial gear acts as the intermediary between the crane itself and the material being lifted. The integrity and correct application of lifting tackle are paramount to the success and safety of any lifting operation.
Essential Components of Lifting Gear / Tackle
Lifting tackle encompasses a diverse range of equipment, each designed for specific load types and lifting scenarios. The most common components include:
Slings: These are flexible elements used to wrap around or attach to the load. They can be made of chain, offering durability and resistance to high temperatures; wire rope, known for its strength and abrasion resistance; or synthetic materials (like webbing or round slings), which are lightweight, flexible, and non-marring.
Shackles: U-shaped or bow-shaped metal links secured by a pin, shackles are primary connectors used to link slings to the crane’s hook, or to join various parts of the rigging assembly. They are critical in maintaining the security of the connection.
Hooks: While the crane itself has a main hook, specialised latch-equipped hooks or other connecting devices are often considered part of the tackle, ensuring the load cannot unintentionally disengage.
Lifting Beams and Spreader Bars: These accessories are used when a load is long, wide, or has multiple lifting points. Lifting beams are supported at the centre, while spreader bars are supported at the ends, applying compressive force. Both distribute the load evenly across the lift points, preventing crushing or bending of the load and maintaining a safe sling angle.
Clamps and Grabs: Specialised tools, such as plate clamps or drum lifters, are used to grip specific loads where slings are impractical or unsafe, offering a secure, mechanical hold.
The selection of the correct tackle is mandated by strict regulations, such as the Lifting Operations and Lifting Equipment Regulations (LOLER) in the UK, which require all equipment to be fit for purpose, clearly marked with its Safe Working Load (SWL), and subjected to regular thorough examinations.
