Applying Working Load Limit to Cargo Securement

Applying Working Load Limit to Cargo Securement

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Applying Working Load Limit to Cargo Securement You are a professional truck driver browsing theMytee websitelooking fornew bindersto add to your toolbox. In the back of your mind is the knowledge that it is possible to be completely unprepared for a new job if you do not buy the right kinds of binders.

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Published 03 May 2016
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Applying Working Load Limit to Cargo Securement You are a professional truck driver browsing theMytee websitelooking fornew bindersto add to your toolbox. In the back of your mind is the knowledge that it is possible to be completely unprepared for a new job if you do not buy the right kinds of binders. As such, one of the things that have to be considered is working load limit (WLL), whether you are purchasing a Durabilt ratchet binder, a removable handle binder, or any of the other binder products we carry. There is the science behind WLL and how it is applied to every load you carry. For the purposes of definition, WLL is the amount of force that can be applied to a piece of lifting or securement equipment without breaking that piece. WLL ratings are usually stamped on binders to make it easier for customers to know what they are purchasing. As a general rule for American manufacturers, WLL is about one-fifth of the force necessary to cause failure, also known as minimum breaking strength. By making WLL less than minimum breaking strength, manufacturers give users a little bit of wiggle room without substantially increasing risk.
Calculating WLL for Your Loads Making sure you have the right equipment to secure a load properly is a matter of a simple mathematical formula. The total WLL required for safe transport on a flatbed trailer is equal to one-half of the total weight of the cargo being carried. That means 20,000 pounds of cargo must be secured with chains and binders with a minimum WLL of 10,000 pounds. Ensuring the right WLL for a given load is easy when chains and binders are rated equally. When they are not, the trucker uses the lesser of the two. In other words, assume a binder with a 4,500-pound WLL is paired with the chain rated at 5,500 pounds. The total WLL of the assembly is the lesser of the two4,500 pounds in this case. This seemingly minute detail should never be overlooked. Using the higher of the two ratings could lead to improper securement that could eventually result in a load breaking loose. At the very least, chains and binders can be damaged when WLL is not calculated correctly. Equal Force Distribution Across Loads Although calculating WLL is relatively easy in most cases, it means nothing in terms of how loads should be properly secured. The laws in every state require truckers to make sure loads are securely fixed and pose no danger of breaking loose, though they do not necessarily dictate the details of how to accomplish this. Therefore, common sense must be used.
The laws of physics dictate that proper load securement procedures evenly distribute force across the entire load. In simple terms, the trucker is far better off using three chains with a combined WLL appropriate to the load rather than a single chain of a higher WLL across the center of the load only.
Distributing force evenly across the load will keep cargo in place throughout the journey. It will also minimize the risks of damage presented by the force of chains in direct contact with cargo. The trucker should always remember that uneven force is never a good thing. Mytee Products is proud to have added a number of new products to our inventory, including a new selection of binders. The Durabilt ratchet binder and removable handle bindernow availablethrough our website are both popular options. All of our binders are stamped with WLL ratings and meet or exceed all safety standards required by law.