How to calculate lashing capacity for load securing
Lashing capacity (LC) is a strap's rated safe working force in daN. EN 12195-1 sets the EU formula for how many straps a load needs based on weight and friction.
Logifie Team
Logistics Technology Experts
Lashing capacity (LC) is the maximum force a strap can safely apply when tensioned, printed in daN (decaNewton, equal to 10 newtons) on its label. Under EU rules (EN 12195-1 and the European Commission's guidelines), total lashing force must exceed the cargo's weight multiplied by gravity, divided by the deck's friction coefficient.
What is lashing capacity (LC) and how is it measured?
LC is a rated figure stamped on every compliant strap or chain label, and it states the strap's safe working force under tension, not its breaking point. Standard tension force (STF) is different: it is the tension a loader can realistically generate by hand with a ratchet tensioner, and it is almost always well below LC. Only the achievable STF counts toward a top-over (tie-down) calculation, since that force is what actually presses the load onto the deck. For direct or loop lashing, where the strap runs from the vehicle to an anchor point on the cargo, the full rated LC counts instead. Drivers unsure which figure applies to their equipment can check the carrier compliance FAQ before loading.
How do you calculate the number of lashing straps needed?
The number of straps needed depends on three things: cargo weight, the direction of travel forces (forward braking demands more securing force than sideways or rearward movement), and the friction coefficient (mu) between the load and the deck surface. A higher-friction surface, such as a certified anti-slip mat, absorbs much of the load's inertia on its own, so fewer straps are needed to close the gap. A low-friction surface, such as bare steel on steel, leaves nearly the whole securing force to the straps. Fleet safety teams that standardize these checks across a network typically build them into route and vehicle planning through a TMS load-compliance workflow .
| Deck/load-surface friction coefficient (mu) | Approx. minimum securing force needed (as % of cargo weight) |
|---|---|
| Bare wood on wood (mu approx 0.2-0.25) | approx. 80-100%+ of cargo weight |
| Wood with certified anti-slip mat (mu approx 0.6) | approx. 30-40% of cargo weight |
| Steel on steel, no mat (mu approx 0.1-0.15) | approx. 100%+ of cargo weight (mats or extra straps required) |
| Direct/loop lashing at 20-65 degree vertical angle | reduces required strap count versus top-over tie-down at equal LC |
These figures are illustrative ranges from EN 12195-1 and the European Commission's reference coefficients, not exact values for any specific cargo; every load still needs its own case-by-case check.
Which EU standard governs load-securing calculations?
The harmonized calculation method across the EU comes from EN 12195-1:2010, "Load restraining on road vehicles - Safety - Calculation of securing forces" , which sets the acceleration coefficients and lashing-force formulas that roadside inspectors still test against in 2026. The European Commission's 2014 European Best Practice Guidelines on Cargo Securing for Road Transport turn that standard into operational checklists, and IRU's international guidelines on safe load securing extend the same principles across cross-border transport. The formula itself has not changed since the standard was published, so a haulier checking a load today works against the same reference enforcement authorities use at roadside stops. For more EU compliance explainers, browse the Logifie blog .
Frequently asked questions
How many lashing straps do I need for a 1,000 kg pallet?
The exact count depends on the friction coefficient of the deck and the securing method used, so there is no single fixed number. On a low-friction surface with top-over tie-down lashing, a loader may need several straps to reach the required securing force, while a high-friction anti-slip mat combined with direct lashing can cut that number substantially for the same pallet.
What is the difference between lashing capacity (LC) and standard tension force (STF)?
LC is the strap's rated maximum working force, printed on its label, and it applies in full when the strap is used for direct or loop lashing. STF is the lower, realistic tension a loader achieves by hand with a ratchet, and it is the figure that counts in top-over tie-down calculations because it reflects the force actually pressing the load onto the deck.
Does the friction coefficient of the load bed change how many straps I need?
Yes, and it is often the single biggest variable in the calculation. A certified anti-slip mat can cut the required securing force by more than half compared with bare wood or steel, meaning fewer straps or lower-rated equipment can still meet the EN 12195-1 requirement for the same cargo weight.
Is a load-securing calculation a legal requirement for EU hauliers?
Yes, correctly secured cargo is a road safety and roadworthiness requirement enforced during roadside checks across the EU, and an inadequately secured load can result in fines, vehicle detention, or liability for damage and injury. Carriers and loaders are expected to show that their securing method meets the EN 12195-1 calculation, not just that straps were used.
Give drivers a way to log load-securing checks before every departure. Explore the Logifie Driver Assistant app .
