Spotlight Rigging
Below the Hook Lifitng lifting delicate or irregularly shaped loads.
• Chain slings made from high-strength alloy steel are durable and resistant to abrasion and high temperatures. Shackles to connect slings, chains or ropes to lifting equipment come in various types, including screw pin, bolt and snap shackles designed for specific applications.
Hooks used to attach loads to lifting equipment in various shapes and sizes include eye hooks with a closed loop at one end, clevis hooks with a U-shaped clevis and a pin and swivel hooks that allow rotation to prevent twisting of the load.
Hoists used to lift and lower loads include:
• Manual Hoists: Operated by hand, suitable for lighter loads and precise positioning.
• Electric Hoists: Powered by electricity, ideal for frequent and heavy lifting tasks.
• Hydraulic Hoists: Use hydraulic fluid for lifting, providing high lifting capacity and smooth operation.
• Pneumatic Hoists: Powered by compressed air, suitable for environments where electrical sparks are hazardous.
Common Configurations
A vertical hitch attaches a sling directly to the load for lifting equipment in a straight line. It is suitable for lifting loads with a single attachment point and provides a stable and straightforward lifting method.
A choker hitch wraps a sling around the load and passing one end through the other to create a choke. This configuration provides a secure grip on the load but reduces the sling’ s lifting capacity due to the increased tension.
A basket hitch passes a sling under the load and attaches both ends to the lifting equipment. This configuration distributes the load evenly and increases the lifting capacity of the sling. It is ideal for lifting long or irregularly shaped loads.
Equipment Inspection
Regular inspection of rigging and hoisting equipment is essential to identify wear, damage or defects. Inspect slings, shackles, hooks and hoists for signs of wear, corrosion, deformation or other issues.
When inspecting slings, look for signs of wear, damage or deterioration, such as cuts, abrasions or broken fibers. Pay close attention to stitching, hardware and attachment points, as these are common failure points.
Maintaining Readiness
Regular training is essential for maintaining proficiency and readiness in rigging operations. By investing in training, organizations can enhance safety and efficiency in rigging operations and minimize the risk of accidents and injuries.
Practical scenarios provide insight into the application of rigging techniques and give riggers a deeper understanding of the principles and strategies involved in safe and efficient lifting operations. Some examples include:
Lifting Irregularly Shaped Loads: Irregularly shaped loads present unique challenges for riggers, as they may be difficult to balance and secure. In such cases, riggers may need to use multiple slings and rigging configurations to distribute the load weight evenly and prevent shifting during lifting. Specialized rigging equipment, such as spreader bars or lifting beams, may also be required to provide additional support and stability.
Navigating Tight Spaces: Working in confined or restricted spaces poses challenges for rigging operations, as there may be limited room to maneuver and position lifting equipment. Rigging configurations may need to be adapted to accommodate tight spaces, such as using shorter slings or adjusting the angle of lift.
Working in Adverse Weather Conditions: High winds, rain or extreme temperatures can pose safety risks for rigging operations. In such situations, riggers must take precautions to ensure that lifting operations can be conducted safely. This may include delaying operations until weather conditions improve, using additional rigging hardware or support structures to enhance stability or implementing special procedures.
Equipment Failure: Rigging equipment, such as slings, hardware and lifting devices, are subjected to immense stress during lifting operations. Failure of any component can endanger workers and property.
Effective communication also critical in rigging operations to help prevent misunderstandings, coordinate movements and alert team members to potential hazards. One common communication protocol in rigging operations is the use of standardized hand signals to convey common messages. In addition, radio communication for coordinating rigging activities allows riggers, crane operators and other personnel to convey detailed instructions and information.
Mastering rigging techniques is essential for ensuring the safety and efficiency of lifting operations. From proper sling configurations to understanding load distribution, rigging angles and effective communication strategies, there are many factors to consider. It is critical to understand and prioritize safety in rigging environments to prevent accidents and improve jobsite efficiency.
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May 2025 • www. cranehotline. com