Flat slings and round slings are both types of synthetic lifting slings that are used to lift and move heavy loads. And as much as they are similar in form and function, there are some key differences between these two types of slings.
Flat slings, also known as web slings, are made from a flat piece of fabric, typically polyester (nylon is available upon request). Because they are so pliable, they can be used to lift in many different hitches (vertical, choker and basket) and they conform well to irregularly shaped objects. They often provide improved load stability as well because they offer greater surface area contact and help to distribute the weight of the load evenly. Flat slings may be considered more adaptable too when compared to round slings, being easier to slide under objects or use in tight spaces.
Round slings, on the other hand, are made from a continuous loop of fabric, typically polyester. They are often used for lifting cylindrical objects, such as pipes or drums, as the round shape of the sling conforms to the shape of the load. However, round slings can be used in all common hitches, just like flat web slings. Round slings are also less likely to cause damage to the load, as there are no sharp edges to cut into the load. Additionally, round slings are inherently tougher and better protected, because the visible outer jacket (color coded for strength) exists ONLY to protect the inner strands, which carry the load. Round slings, if used properly, usually offer greater service life and help users select the right sling with confidence.
Both flat and round slings have their advantages and disadvantages, and the choice between the two will depend on the specific requirements of the lifting task. It is important to select the appropriate type of sling for the load being lifted to ensure safe and efficient lifting operations. And lastly, be sure to use wear pads when appropriate--sling protection is often overlooked, but it's critically important! There are many types available that will help to protect your sling against damage and cuts, which can lead to catastrophic rigging failures.
