Lashing Capacity Vs Break Force: What's the Difference?

When you’re shopping for ratchet straps, there are two key terms you’ll come across: breaking force (or strength) and lashing capacity. Understanding what each one means - and the difference between the two terms - is crucial. If you’re not careful, you could end up with a ratchet strap that’s not strong enough for the task at hand.

To help make these figures easier to understand in practice, we’ve also created a Lashing Capacity & Break Force Guide. This guide brings together clear explanations, real-world examples, and a comparison table covering different strap types and strengths, making it easier to choose the right restraint for your application.

What does lashing capacity mean?

Lashing capacity is typically measured in daN, which stands for decanewtons. This term refers to the maximum tension the strap can safely withstand without breaking or tearing.

Lashing capacity is always the figure that should be used when planning how a load is secured. It reflects safe, repeatable use under real working conditions rather than one-off test results. In the full Lashing Capacity & Break Force Guide, we explain how LC applies across different strap widths and constructions, and how to use it when calculating the number of straps required.

What about break force?

By contrast, break force refers to the maximum weight (in kg) a strap can withstand before breaking. Manufacturers work out this figure by testing the strap with its ratchet handle and hooks in place - so if you exceed this figure and overload your strap, you are risking failure. It should go without saying that this is never a good idea!

How are the two linked?

Although these terms refer to separate things, they are interlinked. Generally, the break force in kg is double the lashing capacity in daN, unless otherwise stated.

So, if you only know the lashing capacity of your strap and want to work out the maximum weight it can safely withstand, this is a good rule of thumb. We would recommend always allowing some wiggle room here though, just to be safe - it’s not worth pushing your straps to their breaking point.

Explore our range of high-quality ratchet straps today

Searching for quality ratchet straps you can count on? With over two decades of industry experience and a high-tech manufacturing and testing facility right here in the UK, Taut Strap is the only supplier you need.

We have a wide range of products in stock, ranging from spare hooks, ratchet handles and other accessories to 10,000 kg heavy duty ratchet straps in custom lengths and colours, we can manufacture everything you need. We even produce bespoke straps to suit customers’ specific requirements. Explore our complete range of products and order yours online today.