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More Info on Ratchet Strap

The well known fact is that the assembly of tie down webbing and ratchet buckle usually called ratchet tie down, if we use cam buckle instead of ratchet buckle then it's cam buckle tie down, it's pretty straight forward, isn't it? Cam buckle tie downs are only for light duty use, and 2'' cam buckles are the biggest size we will see in the real world use, and it's still light duty. Ratchet buckles are different, there are 1'' to 4'' ratchets, and they can be quite heavy duty and can stand all kinds of abuse, the most commonly used on commercial trucks are 2'', 3'' and 4'' ratchet tie downs, they have working load limit of 3,333lbs, 5,400lbs and 5,400lbs respectively, these assemblies have design factor of 3:1, thus the minimum breaking strength is 10,000lbs, 16,200lbs and 16,200lbs respectively.

Up to now what we talked about is the tie downs for flatbed or similar transportation vehicles, there are another category of ratchet straps for semi trailers, ratchet e track straps, these tie down devices will be used with E Tracks installed inside the semi trailer. By estimation, there are almost 80% trucks on the road are box trucks, so these e track straps are supposed to the most popular ones by volume. And these straps are not as strong as the one we use on flatbed truck, the working load limit of typical e track straps is 1000lbs, with minimum breaking strength of 3000lbs. It's easy to understand that why e track straps are not as strong as regular ratchet tie down straps, inside the box truck the loads already have strong support, at least there is no risk of falling off, the e track straps will do is to fixate the loads more than tie them down. With the help of e track cargo bar, rope tie off and some other e track tie downs and accessories, it's pretty easy to secure loads inside the box trucks, but easy doesn't mean not important, yuo still have to look out for any risks may present in the process of transportation, so secure your loads as reliable as you can, use the right tie down devices for your job.

As we mentioned in the first paragraph, the design factor of ratchet assembly is 3:1, that means the working load limit is 1/3 of the minimum breaking strength, while grade 70 transport chains which have a design factor of 4:1, that means the transport chains will work in more tough environment than tie down straps, which usually are chose for regular loads. The standard material of which tie down webbing is made is nylon webbing or polyester webbing, depends on different tie down applications. The typical application for nylon webbing is motorcycle tie down, which polyester webbing is ideal for tying down concrete pipes. When making the webbing, we have to take following characteristics in to consideration, the breaking strength, elongation, abrasion and the environment. Breaking strength has to reach the recommendation level no matter what, and elongation has to meet the requirement, abrasion and environment sometimes are not that clear cut, when designing tie downs we may have to consider the most extreme conditions they may be in, or we may just consider the normal transportation environment.

As we know that all these tie down straps are trucking accessories, which have much more than just straps, such as tranpsort chains and ratchet binders, cargo bars and hoop set, and much more.

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