Minimum breaking strength (sometimes shortened to MBS) is a key term when talking about ratchet straps. MBS refers to the load or force that can be handled before the item breaks. When lifting or securing a load, you should be careful to avoid pushing an item past its MBS.
For example, a specific ratchet lashing system may have a minimum breaking strength of 800daN. You will often see that ratchet straps measure minimum breaking strength in daNs, which stands for decanewtons.
Below are some additional details about minimum breaking strength, but this article is informational only: always do your own research and read labels carefully before proceeding with any work.
Understanding Minimum Breaking Strength
The most important thing to understand about minimum breaking strength is that you should never push an item to its MBS. Though sometimes an MBS is the force an item can withstand before it fails, it only has to withstand this weight once.
In fact, some MBS measurements are specifically for new items only. Items that are used repeatedly should not be pushed to this extreme as they may wear over time. Even if an item withstands an MBS once, there’s no guarantee that it will continue to handle this kind of usage.
MBS vs LC
Lashing capacity is usually half the minimum breaking strength, and refers to the maximum force a web lashing is designed to sustain in a straight pull.
Let’s look at the example from earlier. That same ratchet lashing system with a minimum breaking force of 800daN has a lashing capacity of 400daNs. In this instance, the lashing capacity is half the minimum breaking strength.
Alternative Terms for Minimum Breaking Strength
If you cannot find the minimum breaking strength for a particular item, it’s possible that a different term is being used.
Minimum breaking load usually refers specifically to the weight of the load that would break the item.
Minimum breaking force usually refers specifically to the force of the load that would break the item.
Though there are small differences between these terms, it’s likely you will see them used interchangeably. However, different measurements may be used, like Kgs when measuring loads. Check terms and labels carefully to ensure you know exactly what the measurement is referring to.
Ratchet Straps
For sturdy ratchet straps, rely on Tensys Direct. We provide great load securing equipment, as well as a range of other products. Plus, we have great customer service, so if you are still unsure about minimum breaking strength you can speak to a member of our team.
Read More: Ratchet Strap Labels Simplified