What Is a Tension Strap in Logistics?
A tension strap is a ratchet lashing belt that secures cargo on trucks and vans, preventing load shift during road transport.
A tension strap in logistics is a polyester webbing strap with a tensioning mechanism used to apply direct downward force to cargo on a road freight vehicle, anchoring it to the vehicle's lashing points and preventing movement during transit.
The working load limit printed on the strap label is not the pre-tension the tensioning mechanism achieves in use — the two figures differ significantly, and the pre-tension determines the actual clamping force the strap applies to the load during braking and cornering.
How does a tension strap work?
A tension strap works by routing polyester webbing over the top of the load and hooking both ends to the vehicle's lashing rails on opposite sides of the vehicle floor. The tensioning mechanism then applies and locks the force, pulling the load downward toward the vehicle floor.
The clamping force does two jobs at once. It increases friction between the load base and the vehicle floor — particularly when anti-slip matting sits beneath the load — and it applies direct restraint against forward and lateral movement under braking and cornering. A strap tensioned correctly and anchored to the lashing point closest to the load base holds the load against the deceleration forces EN 12195 specifies. A strap that is loose, badly angled, or anchored far from the load base delivers a fraction of the same securing force. Loads that extend beyond the deck edge fall under separate overhang rules, and straps alone do not make an overhanging load compliant.
Tension straps belong to the force-fit securing method among the Go Trans logistics operations terms, alongside load securing principles, cargo handling operations, and the other terms governing how freight is prepared and held safely on European road vehicles. All of these sit within the wider European freight terminology of the Go Trans glossary.
What types of tension strap are used in freight transport?
3 types of tension strap are standard in European road freight, distinguished by their tensioning mechanism and the load weight they are designed to secure.
A ratchet strap uses a ratchet mechanism that tightens the webbing incrementally with each stroke of the handle. The ratchet achieves high pre-tension and is the standard choice for pallet and freight loads where significant securing force is required. A cam buckle strap uses a spring-loaded cam that grips the webbing when released, applying lower and more controlled tension — the correct choice for fragile or light goods where a ratchet would apply more force than the packaging can withstand. A two-piece tension belt — the standard format on European LTL and groupage services — consists of a fixed end with a hook and locking element and a loose end with the webbing, used for tie-down and diagonal lashing on shared-vehicle services.
Polyester webbing is the standard material across all three types for road freight. It has low stretch, resists UV exposure and moisture, and holds its rated capacity across the temperature range of a standard European road freight movement. Go Trans arranges pallet delivery and dedicated van transport across Europe through its carrier partners, with the carrier's securing equipment confirmed for the consignment type at the booking stage.
The label on every strap carries a capacity figure — and understanding exactly what that figure means is the difference between a compliant securing system and one that looks correct but is not.
What is the working load limit (WLL) on a tension strap?
The working load limit — labelled as lashing capacity (LC) under EN 12195-2 — is the rated capacity printed on the strap label. It is not the pre-tension the tensioning mechanism achieves in use.
Pre-tension is the actual clamping force the ratchet or cam buckle applies to the load when operated. A 50 mm ratchet strap typically carries an LC of 2,500 daN in straight pull, while its ratchet achieves a standard tension force (STF) of around 300–600 daN depending on the ratchet type. The 2,500 daN LC is the maximum force the strap can sustain when used correctly as part of a compliant securing system — it is not the force generated by one ratchet stroke. The EN 12195-2 label shows both figures: the LC for direct lashing and the STF for tie-down calculations.
Under EN 12195, the number of straps required for a load is calculated from the load weight, the friction between the load and the vehicle floor, the STF per strap for tie-down lashing or the LC for direct lashing, and the lashing angle between the webbing and the load surface. The WLL alone does not determine how many straps are needed.
How does the lashing angle affect tension strap performance?
The lashing angle directly determines how much of the strap's pre-tension becomes useful clamping force on the load. A strap positioned at 90° to the load surface — vertically downward — delivers its full pre-tension as clamping. A strap draped diagonally at 15° delivers a fraction of the same force. One strap at 90° provides the equivalent clamping of 4 straps at 15°.
In practice this means anchoring the strap to the lashing point closest to the base of the load, not the nearest available point on the rail regardless of position. A load stacked 1.5 m high on a 120 cm wide pallet, strapped to a lashing point directly beneath the strap's edge, produces a near-vertical angle and maximum clamping. The same strap anchored to a lashing point 2 m away along the rail produces a shallow angle and a significantly reduced securing force for the same number of straps and the same ratchet operation.
This is the core calculation principle in cargo securing under EN 12195 and VDI 2700 — applied specifically to how tension strap placement determines whether a compliant number of straps produces a compliant securing force.
One further element of correct strap application sits alongside angle and quantity — the accessory placed between the strap and the load surface.
What accessories are used with tension straps?
Edge protectors are the primary accessory used alongside tension straps on pallet and freight loads. A webbing strap bearing directly on a cardboard carton edge, a plastic wrapper corner, or any surface that cannot withstand point-contact pressure concentrates the entire securing force on one point — the strap cuts into the packaging rather than securing the load.
An edge protector is placed at every point where the webbing crosses a sharp edge or vulnerable packaging surface before the ratchet is operated. It distributes the strap force across the full corner width, prevents packaging crush under tension, and stops the strap from migrating down the load face during transit. Edge protectors are confirmed and positioned during cargo handling at the collection address, before the vehicle's doors or curtains are closed and before the driver performs the final pre-departure securing check.
The questions below cover the remaining practical points: the step-by-step use sequence, the strap-type selection decision, European terminology, and correct storage after use.
Frequently asked questions about tension straps in logistics
How do you use a tension strap on a freight vehicle?
Position the load on anti-slip matting on the vehicle floor. Route the webbing over the top of the load and hook both ends to the lashing rail on opposite sides of the vehicle. Place edge protectors wherever the webbing crosses a packaging edge or sharp corner. Operate the ratchet handle until the load holds firm under manual pressure, then close the ratchet handle to lock the tension. Confirm all hooks are fully seated before the vehicle moves.
What are the different strap types and when is each used?
Ratchet straps secure standard pallet and freight loads where high pre-tension is needed to resist braking and cornering forces. Cam buckle straps are used for electronics, fragile goods, or light loads where a ratchet mechanism would over-compress the packaging. Two-piece tension belts are used on LTL and groupage services where the load configuration requires flexible strap routing across multiple anchor points on the vehicle's lashing rail.
What is a tightening strap called in European freight?
A tightening strap in European freight is called a tension strap, tension belt, lashing strap, tie-down strap, or ratchet strap depending on the country and context. In German-speaking logistics the standard term is Spanngurt. In French-speaking logistics the term is sangle d'arrimage. All refer to the same category of polyester webbing strap with a tensioning mechanism anchored to the vehicle's lashing points.
How do you store a tension strap after use?
Open the ratchet fully before rolling — a closed ratchet traps the webbing under tension and stresses the mechanism over time. Check the webbing for cuts, fraying, faded capacity labels, and hook deformation before rolling. Fold the fixed-end hook against the webbing, then roll from the hook end toward the ratchet in a tight cylinder. Store the rolled strap dry, away from UV exposure and chemical contact, in a bag or container that keeps dirt off the webbing surface between uses.