Construction today has options for tools that people didn’t have in the past: a synthetic sling. The most popular synthetic used in sling making is polyester. Polyester allows for some stretching without breaking, allowing for a tighter band around a machine or whatever else that needs to be secured and lifted. Most slings used to be made of sisal, a strong type of rope. But in the 1960’s the first polyester round sling was developed, and people who make constructions tools have taken to adding polyester and other synthetics to their repertoire since.
Practicality
Slings come in a variety of colors and with a choice of mechanical fittings of different metals. Slings are very useful in temporary securement for getting Item A to Place B, such as from a dock to a cargo ship. Because slings are flat and spread the load, they grip well and won’t damage the outside containers of items being shifted. They are also great in general construction, painting jobs, and ocean jobs. They are strong, easy to use, are a good investment because they last, can handle changes in weather and temperature with ease, and can take a hit without breaking. These are sound economic reasons to use synthetic slings.
Safety Use
Slings are best used as directed by the manufacturer. New slings will have written on them important information for ease of use, such as the rated loads for hitches in use plus the angle on which the information is based. They will often also have the type of material and its construction in case there is a need for a specific type of sling for a specific cargo. Rated loads are further based on design, the curvature of the sling itself over a load, and its material strength. But since a sling isn’t material alone, it’s important to take into consideration the environment where the sling is to be used. For example, aluminum fittings on a sling shouldn’t be used where there are acids or alkalis in proximity use – stainless steel would be a better choice. Follow the manufacturer’s recommendations – paying attention to safety makes for a better workday for everyone.
The Future of Slings
There are many factors that can influence the best use of any sling, whether polyester or other, it is important to check with the sling manufacturer for particulars. But polyester has proven to be one of the most versatile and longest lasting materials, and will remain king in construction for some time to come.