Lifting may look like a simple process from the outside, but it is a skill that requires a lot of training and experience to master. When a lifting operation is not performed properly, it can put people in danger and result in serious consequences. Here are some critical things to know when it comes to lifting, rigging, and more.
Lifting vs. Rigging
Lifting and rigging are distinct processes, so it’s important for them to be defined. Rigging happens before lifting. It is the process of securing and attaching loads. Lifting, on the other hand, is the process of moving the equipment once it’s rigged. While they are different processes, both rely on the knowledge of the other to have a successful operation.
Sling Materials
Slings are an important tool in the lifting process—they connect the load to the crane or hoist. There are several types of slings made from different materials that are used during different jobs. Synthetic web slings and synthetic round slings are two common types that are used with heavy loads. They are strong and provide control and precision for heavy lifting. Chain slings are another option that are often used for heavy or oddly shaped loads. Choosing the right sling with the right working load limit (WLL) is essential to ensuring the load can be lifted and moved safely.
Types of Hitches
Slings can be hitched onto loads in a number of different ways. There are three basic types of hitches that are used for lifting: vertical (or straight) attachments, choker hitches, and basket hitches.
- Vertical (straight) attachments: This type of hitch connects a lifting hook to a load using a single piece of chain or webbing. One challenge with vertical attachments is their tendency to rotate when lifted. This is why they are often not used for large, heavy loads with a crane.
- Choker hitches: With this hitch type, one eye of the sling loops through the other. This tightens the sling as the load is lifted, providing extra security. Webbing straps or slings are often used for choker hitches.
- Basket hitches: These hitches distribute a load equally by cradling it between the two legs of the sling. Basket hitches should be used with loads that are easy to balance.
The Importance of Angles
Understanding angles is another important aspect of lifting. The angle of the rigging plays a huge role in determining what type of sling will work best for specific lifts. WLL capacities can also change depending on the angle. The weight of the load, sling material, hitch type, and angle all factor into calculating a safe lift.
Although lifting may look easy, it is a complicated process with a lot of factors to keep in mind. Have questions about lifting and rigging? Read more about lifting or reach out to Olsen Chain & Cable for expert advice and guidance.
