Choosing the correct ratchet strap load rating is essential for securing loads safely and legally. Using a strap that is underrated can lead to load movement, damaged goods, enforcement issues, or strap failure. Over-specifying can be unnecessary and costly.
This guide explains how ratchet strap load ratings work, what the figures actually mean, and how to select the correct strap for your application.
What Does Ratchet Strap Load Rating Mean?
Ratchet strap load rating refers to the maximum load a strap is designed to restrain in use.
In the UK and EU, this is shown as the Lashing Capacity (LC) and is normally printed on the strap label.
This is different from the breaking strength, which is the force at which the strap would fail under test conditions.
Key point:
Always choose straps based on lashing capacity, not breaking strength.
Understanding the Key Ratings on a Ratchet Strap
Most compliant ratchet straps will display several figures on the label.
Lashing Capacity (LC)
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The safe working load of the strap
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Shown in daN (1 daN ≈ 1 kg)
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Example: LC 2,500 daN ≈ 2,500 kg
This is the primary rating you should use when selecting a strap.
Breaking Strength (BS)
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The force at which the strap fails during testing
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Typically 2x the LC
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Example: 5,000 kg breaking strength ≈ 2,500 kg LC
Breaking strength is useful for manufacturing standards but should not be used for load calculation.
Standard Tension Force (STF)
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Indicates how much tension the ratchet can apply
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More relevant for heavy or rigid loads
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Common on ergonomic or geared ratchets
STF helps achieve higher restraint with fewer straps but does not replace LC.
How Much Lashing Capacity Do You Actually Need?
A simple rule of thumb for most road transport applications:
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The total lashing capacity should be at least equal to the weight of the load
However, this depends on:
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Load weight
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Load shape
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Securing method (over-the-top or direct lashing)
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Vehicle type
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Friction between load and bed
Example
If you are securing a 2,000 kg load using over-the-top lashings:
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Two straps rated at 1,000 kg LC each may be sufficient
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One strap rated at 2,000 kg LC may also be suitable, depending on stability
For uneven, tall, or rolling loads, additional capacity is recommended.
Typical Ratchet Strap Load Ratings and Uses
800 kg LC Ratchet Straps
Best for:
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Light commercial loads
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Small machinery
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General van use
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Boxed or palletised goods
Commonly found in 25mm wide straps.
2,000 kg LC Ratchet Straps
Best for:
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Medium duty loads
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Machinery and equipment
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Builders’ materials
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Plant and tool transport
Often 35mm wide and widely used across trade fleets.
5,000 kg LC Ratchet Straps
Best for:
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Heavy plant and machinery
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Steel loads
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Vehicles and plant trailers
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HGV flatbeds
Typically 50mm wide with reinforced ratchets and heavy duty end fittings.
Why Strap Width Matters
Strap width and load rating are closely linked:
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Wider straps distribute force more evenly
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Narrow straps can damage loads if overtightened
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Heavy loads should always use wider webbing
As a guide:
Common Mistakes When Choosing Load Rating
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Choosing based on breaking strength instead of LC
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Using one high-rated strap instead of multiple correctly rated straps
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Ignoring load movement and friction
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Reusing worn or damaged straps
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Mixing straps with different ratings on the same load
If in doubt, add capacity, not risk.
Compliance and Best Practice
All ratchet straps used for load restraint should:
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Be labelled and traceable
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Show LC, STF (where applicable), length, and standard
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Be free from cuts, burns, or damaged stitching
Straps should be inspected regularly and replaced when damaged.
Choosing the Right Strap on UK Ratchet Straps
On UK Ratchet Straps, straps are grouped clearly by load rating and duty level, making selection straightforward.
If you are unsure:
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Match the strap LC to your load weight
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Choose the next rating up if the load is unstable
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Use multiple straps rather than relying on a single lashing
If you need help selecting the correct rating for a specific application, our team can advise.