Strapping & Lashing

The Difference Between Strapping and Lashing

Strapping is the process of binding a load group — a carton, pallet or package — into a single unit by wrapping it with a tensioned strap. Lashing, on the other hand, secures the load to fixed anchor points on the container body (rings, rails or lashing points) to prevent it from shifting or tipping during transport. In export loading, the two methods are usually used together: strapping keeps the package intact, while lashing — using cargo securing straps and cargo tie-down systems — keeps the load from moving inside the container.

Choosing a Strapping Material: Steel, PET, PP, Woven and Composite

Pallet strapping products fall into five main material groups, each suited to a different load profile:

• Steel strapping: Offers the highest absolute strength; preferred for heavy industrial and metal loads and applications where no stretch is wanted.
• PET (polyester) strapping: A safe, economical alternative to steel strapping that retains most of its tension after stretching.
• PP (polypropylene) strapping: The most economical option among strapping products; although it looks similar to PET from the outside, its tension-retention performance is noticeably lower, which limits it to light-duty, short-term binding needs.
• Woven strapping: Its soft, flexible construction suits loads with sensitive surfaces, irregular shapes, and light-to-medium weight.
• Composite strapping: Lighter and more economical than steel strapping; offers a safe middle ground for heavy palletized loads.

The right choice depends on the load's weight, surface sensitivity, transport duration and the strapping machine to be used — each material's own product page covers this choice in detail. PP and PET strapping are the two types that look most alike from the outside; the difference between them is covered separately on the PP strapping product page.

Why Do Elasticity and Recovery Matter?

The most notable difference between the five materials lies less in their raw strength than in how they behave after being tensioned. During transport, a load can settle slightly — meaning its volume can shrink a little — due to vibration, temperature change, or the weight of the package itself. Steel strapping, with its low stretch allowance, cannot compensate for this gap and loosens; PET and composite strapping, by contrast, continue to hold a certain tension thanks to elastic recovery. PP strapping can stretch more than PET, but its tendency to return to its original length afterward is limited, and permanent loosening can appear over time. Woven strapping, given its inherently soft construction, already has high flexibility, but this flexibility may not provide enough tightness for very heavy, rigid loads. For this reason, the question of 'how will it behave during transport' needs to be answered before the question of 'which one is stronger.'

Why Does This Matter for Export Loading?

When a container load securing system is missing or wrongly chosen, the cargo can arrive at its destination damaged — meaning extra cost and lost trust with the buyer. When choosing export strapping products, it's not enough to look at how secure the load is at the moment of loading; you also need to consider whether that tension will hold over days of sea or land transport. On long sea voyages, temperature and humidity fluctuations can introduce an added wear factor not seen in shorter road transport. The product pages below address this behavior separately for each strapping type.

Connection and Securing Equipment

The safety of a strapping or lashing system depends not only on the band itself but also on the accessories used with it. Commonly used equipment includes lashing straps, lashing buckles, lashing plates, phosphated and galvanized wire buckles, manual strapping tensioners, plastic corner protectors and cargo securing nets. A lashing strap is a tie-down strap with hooks at each end, used to anchor the load directly to fixed points on the container body; a lashing plate is a metal base piece placed under the anchor ring to prevent the load from bearing on a single point at the connection. The choice of strapping buckle must match the strapping material used — for example, wire buckles are used with steel strapping, while plastic or metal buckles are used with PET and composite strapping.

Ratchet tie-down straps and ratchet strap sets, used especially with woven strapping and textile webbing, apply high tension without needing any extra tools thanks to their ratcheting mechanism. In high-volume operations run on strapping machines, the manual strapping tensioner gives way to semi-automatic, fully automatic or battery-powered strapping machines, which increase processing speed and consistency.

What to Consider When Choosing the Right System

• The weight and rigidity of the load (whether it can tolerate any stretch).
• The surface sensitivity of the load (does it need a soft strap such as woven strapping?).
• The transport environment: open storage, humidity or UV exposure.
• Whether strapping will be applied manually or by machine (semi-automatic/fully automatic).

Common Mistakes

• Choosing the wrong buckle: Using a buckle or tensioner that's incompatible with the strapping material causes the connection to loosen prematurely.
• Insufficient tensioning: An under-tensioned strap allows the load to shift during transport.
• Lack of corner protection: Not using corner protectors on sharp-edged loads can cause the strap to cut through or the load to be damaged.