Ratchet Lashing – How to Secure Heavy Loads Safely and Effectively?

What Is a Ratchet Lashing and How Does It Work?

A ratchet lashing consists of three main parts: the webbing (strap), the ratchet mechanism, and the end fittings. The webbing is made from high-tenacity polyester (PES) because it has low stretch (typically only 5-8% under load), high abrasion resistance, and excellent UV stability. It comes in various widths – 25mm (1 inch), 35mm (1.5 inches), 50mm (2 inches), 75mm (3 inches), and wider. The wider the webbing, the higher the load capacity. The ratchet mechanism is typically made of forged or stamped steel with a corrosion-resistant coating. It includes a handle, a windlass, and a pawl (locking mechanism). End fittings are usually flat hooks for attaching to anchor points on a trailer or truck bed.

To use a ratchet lashing, you thread the loose end of the webbing through the slot in the ratchet spool, then pull the webbing to take up slack. Once the webbing is snug against the cargo, you begin cranking the ratchet handle. Each stroke winds the webbing around the spool, increasing tension. A locking pawl prevents unwinding. To release tension, you pull the release lever (or lift the pawl) and open the ratchet fully.

Understanding the working load limit (WLL) is critical. The WLL is the maximum safe force that the lashing can withstand in normal use – it is typically 1/3 of the breaking strength (safety factor of 3:1). For European EN standards, the safety factor is 2:1 for lashing straps. Always use the WLL marked on the label, never the break strength. For example, a strap marked “WLL 2000 daN” (deca-Newton) equates to about 2000 kg of holding capacity. However, the actual force applied to the strap depends on the lashing angle and the number of straps.

Why Choose Ratchet Lashing Over Other Cargo Securement Methods?

Several methods exist for securing cargo: rope, chains with binders, cam buckle straps, and ratchet lashings. Here is why ratchet lashings are often superior.

High tension capacity: Ratchets can achieve tensions of 500-2500 kg or more, far beyond what a cam buckle can deliver. This is essential for preventing load shift during sudden braking or cornering.

Controlled release: Unlike chain binders that can release suddenly and dangerously, ratchet straps allow gradual, controlled release by opening the ratchet handle.

No damage to cargo: Polyester webbing is soft and will not scratch painted surfaces, wood, or delicate goods. Chains can mar and damage.

Lightweight and compact: Ratchet straps are much lighter than chains of comparable strength, making them easier to handle and store.

Versatility: Ratchet lashings can be used on flatbeds, enclosed trailers, vans, pickups, and even on roof racks. They work with a variety of anchor points.

Reusable and durable: Quality ratchet straps last for years with proper care.

The main disadvantage is that ratchet straps can be cut by sharp edges – edge protection is mandatory. Also, they are not suitable for extreme heat (above 80°C) or for securing loads with sharp corners without protection.

What Are the Different Types of Ratchet Lashings?

Ratchet lashings come in various configurations for different applications.

By end fitting:

- Flat hooks (standard): Used for most truck and trailer anchor rails. They have a wide opening that fits over most D-rings and stake pockets.

- J-hooks: Shaped like a “J” – used for wrapping around pipes or tubes.

- Slotted ends (loop ends): Webbing formed into a loop – can be hooked onto anchor points or used with a separate hook.

- S-hooks: Double-ended hook for specialized applications.

- Claw hooks: Designed for wire mesh or thin rails.

By length: Standard lengths range from 2 meters to 10 meters (6 to 33 feet). Longer straps allow for diagonal lashing or wrapping around larger cargo.

By width and capacity: 25mm (WLL up to 400 daN), 35mm (up to 1000 daN), 50mm (up to 2000-3000 daN), 75mm (up to 5000 daN).

By tensioning system: Standard ratchet (hand crank), heavy-duty ratchet with longer handle for higher leverage, and some with a “quick release” feature.

By color: Color coding is often used to indicate capacity: orange for 2000 daN, blue for 2500 daN, yellow for 5000 daN, etc. This helps users quickly identify the correct strap.

For most general cargo (pallets, machinery, lumber), a 35mm or 50mm ratchet lashing with flat hooks is suitable. For very heavy equipment, use 75mm or chains.

What Do EN 12195-2 and Other Standards Mean for Ratchet Lashings?

Compliance with safety standards is not optional – it is required for commercial transport in most countries. The most common standard for ratchet lashings is EN 12195-2 (European standard) or the US equivalent WSTDA (Web Sling & Tie Down Association) standards. These standards define labeling, testing, and safety factors.

An EN-compliant ratchet lashing must have a permanent label with:

- Manufacturer name or logo

- Webbing width (mm)

- Working load limit (WLL) in daN (deca-Newton) or kg

- Standard number (e.g., EN 12195-2)

- Stretch value (typically 5-8%)

- Instructions for use (pictograms)

Without this label, you cannot legally use the strap for commercial transport in Europe. In the US, DOT regulations require that tie-downs meet WSTDA specifications and are marked with the WLL.

Additionally, ratchet lashings must have a safety factor of at least 2:1 (breaking strength = 2 x WLL). Some standards require 3:1 for critical applications. Always choose straps from reputable brands that provide clear labeling and test certifications.

How to Calculate How Many Ratchet Lashings You Need for a Load

Underestimating the number of lashings is a leading cause of load shifts. The required number depends on the weight of the cargo and the friction between the cargo and the trailer bed. The general rule from the US FMCSA (Federal Motor Carrier Safety Administration) and European guidelines:

The sum of the lashing capacities must provide a restraint force equal to at least the weight of the cargo in the forward direction, and 50% of the weight sideways and rearward. However, friction helps: if the cargo has a high friction coefficient (e.g., rubber on wood), fewer straps are needed. If it is low friction (steel on steel), you may need many straps.

A simple method for direct lashing (looped over the top and down to anchor points on both sides) is to use the formula: number of straps = (cargo weight × 0.8) / (WLL per strap × correction factor for lashing angle). For a typical flatbed with high friction, two 2000 daN straps can secure a 2000 kg load when applied with proper tension and angle.

For indirect lashing (tie-down lashing) where the strap goes over the cargo and down to anchor points on the same side, the effective restraint is much lower. In practice, use at least one tie-down for every 3 meters (10 feet) of cargo length, plus an additional tie-down for the first 1.5 meters.

Professional drivers often follow the “one strap per ton” rule, but always consult the official guidelines for your region. When in doubt, add extra straps – it is better to be safe than fined (or worse, involved in an accident).

What Is the Correct Way to Apply a Ratchet Lashing?

Proper technique ensures that the strap achieves its rated WLL and remains secure during transit. Follow this step-by-step procedure for a direct lashing (over the top).

Step 1: Inspect the ratchet lashing. Check the webbing for cuts, abrasions, fraying, knots, or chemical damage. Check the ratchet mechanism for bent or rusted parts, and ensure the pawl engages properly. Check the end hooks for deformation or cracks. Never use a damaged strap.

Step 2: Position the cargo. Ensure the cargo is stable on the load bed, with center of gravity as low as possible. Add dunnage (wood blocks) to prevent shifting.

Step 3: Anchor the hooks. Attach the end hooks to approved anchor points (D-rings, stake pockets, lashing rails). Ensure the hooks are fully seated and cannot slip off. Avoid hooking back onto the webbing.

Step 4: Thread the webbing. Open the ratchet handle fully (unlocked position). Insert the loose end of the webbing through the slot in the ratchet spool until it comes out the other side. Pull the webbing to remove slack, keeping the webbing flat and untwisted.

Step 5: Tighten manually. Pull the webbing tight by hand as much as possible, then close the ratchet handle partway to engage the pawl. Begin cranking the handle back and forth. Each stroke winds the webbing around the spool, increasing tension. Keep the webbing aligned to prevent edge loading.

Step 6: Achieve proper tension. Tighten until the webbing is “guitar-string” tight and the cargo is firmly pressed down. Do not overtighten beyond the WLL – you can damage the strap or the cargo. As a guide, the tension should be such that the strap deflects only slightly when pushed with moderate force.

Step 7: Lock and store excess webbing. Close the ratchet handle completely to lock. Secure the loose tail of webbing by wrapping it around the ratchet or tucking it through the windlass so it does not flap in the wind.

Step 8: Repeat for additional straps. Place straps at intervals appropriate for the load – typically every 1.5 to 2 meters (5 to 7 feet) along the load length. For high center-of-gravity loads, use crossed lashings (X-pattern).

Common Mistakes When Using Ratchet Lashings and How to Avoid Them

Even experienced users make errors. Here are the most common and dangerous mistakes.

Mistake 1: Using a damaged or unlabeled strap. If the label is missing, you have no way of knowing the WLL. Discard it. Also, never use a strap with severe UV fading or abrasion.

Mistake 2: Overtightening. Applying too much force can exceed the WLL and cause the strap to snap or the ratchet to fail. Use a torque wrench or tension indicator if available. Otherwise, a good rule: when the webbing starts to dig into the cargo or the ratchet becomes extremely hard to crank, stop.

Mistake 3: Not protecting against sharp edges. Edges of metal, glass, or wood can cut the webbing under tension. Always use edge protectors (corner guards) made of rubber, plastic, or thick cardboard.

Mistake 4: Twisted webbing. A twisted strap has a much lower breaking strength because the fibers are unevenly loaded. Always lay the webbing flat.

Mistake 5: Inadequate number of straps. Using only one strap for a heavy load, or spacing straps too far apart, invites load shift. Follow the spacing and quantity guidelines.

Mistake 6: Not re-tensioning after driving a short distance. Loads settle and straps can lose tension. Check and re-tighten after the first 30-50 km (20-30 miles) and periodically during long trips.

Mistake 7: Using the wrong anchor point. Ensure anchor points are rated for the WLL of the strap (e.g., a D-ring rated at 2000 kg). Attaching to a thin rail or a plastic part will cause failure.

Mistake 8: Leaving the ratchet handle loose. If the handle is not fully closed, vibration can cause it to open and release tension. Always click it shut.

How to Inspect and Maintain Your Ratchet Lashings

Regular inspection is mandatory for legal compliance and safety. Perform a visual inspection before each use. Look for:

- Cuts, nicks, or tears in the webbing. Any cut longer than 10% of the width requires immediate retirement.

- Abrasion wear (fuzzy webbing) – if the fibers are exposed, discard.

- Knots or splices (never knot the webbing – it reduces strength by 50%).

- Chemical damage (stiff, brittle, or discolored areas).

- Heat damage (melted fibers from contact with hot surfaces).

- UV degradation (fading and loss of texture).

- Ratchet mechanism: check for bent plates, cracked welds, worn pawl teeth, and free movement of the release lever.

- Hooks: check for deformation, cracks, and rust that prevents smooth closing.

If any defect is found, cut the strap to prevent accidental reuse and dispose of it.

For maintenance, store ratchet lashings in a clean, dry place away from direct sunlight, chemicals, and moisture. Do not leave them lying on the trailer floor where they can be run over. Clean dirty webbing with mild soap and water; never use bleach or strong solvents. Lubricate the ratchet mechanism with a silicone-based spray once a year.

A well-maintained ratchet lashing can last 5-7 years in normal use. However, straps used daily in harsh environments may need replacement annually.

Legal Requirements for Ratchet Lashings in Road Transport

Most countries have regulations regarding cargo securement. In the European Union, the directive is based on EN 12195-2 and the standards for load securing. In the United States, FMCSA regulations (49 CFR Part 393, Subpart I) specify that all tiedowns must be in good working order, have a WLL marked, and be used in accordance with the manufacturer's instructions. Specific requirements include:

- The aggregate WLL of all tiedowns must be at least 50% of the cargo weight for forward restraint (more for other directions).

- A minimum of two tiedowns for any cargo over 1.1 meters (42 inches) long or weighing more than 500 kg.

- Edge protection required wherever webbing contacts a sharp edge.

- Straps must be tightened to at least 5% of the WLL for indirect lashings.

Penalties for insecure loads can be severe: fines from $500 to $10,000, out-of-service orders, and even criminal charges in case of accidents. Therefore, using proper ratchet lashing technique and equipment is not optional for commercial drivers.

Ratchet Lashing vs. Cam Buckle Strap – When to Use Which?

Cam buckle straps (also called lashing straps) use a friction-based buckle without a ratcheting mechanism. They are easier and faster to use but cannot achieve high tension. Here is the comparison:

- Ratchet lashing: For heavy loads (over 300 kg), long-haul transport, loads that may settle or shift. Provides up to 2500 kg or more tension. Requires more effort but offers security.

- Cam buckle strap: For light loads (under 300 kg), moving boxes in a van, securing luggage on roof racks, or light furniture. Fast to apply and remove. Not suitable for heavy cargo on open trailers.

Always choose ratchet lashing for commercial loads, pallets, machinery, vehicles, and anything that could become a projectile in a crash.

How to Choose the Right Ratchet Lashing for Your Specific Task

Use this decision guide based on your cargo.

For light cargo (200-500 kg, e.g., furniture, appliances): 25mm or 35mm straps with WLL 400-800 daN. Length 3-5 meters. Two straps minimum.

For medium cargo (500-1500 kg, e.g., pallets of bricks, small machinery): 35mm or 50mm straps with WLL 800-2000 daN. Use edge protectors. Length 5-8 meters.

For heavy cargo (1500-5000 kg, e.g., steel coils, tractors, industrial machines): 50mm or 75mm straps with WLL 2000-5000 daN. Use multiple straps crossed or with direct lashing. Consider chains for extremely heavy items.

For vehicles (cars, vans): Use wheel nets or axle straps with ratchet mechanism. Each wheel should be secured. Avoid using the vehicle’s suspension as an anchor point.

For irregular shaped cargo (pipes, logs): Use J-hooks or choker configurations. Add friction mats underneath.

Always buy from a trusted supplier. Avoid unbranded straps sold at discount stores – they often have false labels or low-quality polyester that stretches excessively.

What Are the Signs That a Ratchet Lashing Needs to Be Retired?

Replace a strap immediately if you notice:

- Any cut or tear longer than 10% of the width.

- More than 15% of the webbing fibers are abraded.

- The label is illegible or missing (you cannot verify WLL).

- The ratchet fails to lock, slips, or has a bent handle.

- The webbing has been exposed to acid, bleach, or battery acid.

- The strap has been overloaded (if it ever broke, discard all parts).

- The strap has been in use for more than 10 years (even if it looks good, polyester degrades over time).

Environmental and Sustainability Aspects of Ratchet Lashings

Polyester webbing is recyclable but not widely accepted in curbside recycling. Some industrial recycling programs accept clean polyester straps. You can also reuse old straps for non-safety purposes (e.g., garden ties, workshop projects). To reduce waste, choose heavy-duty ratchet lashings that will last many years rather than cheap straps that fail quickly. Some manufacturers now produce straps with recycled polyester webbing, though availability is limited. Proper maintenance extends life, reducing the frequency of replacement.

Frequently Asked Questions (FAQ)

What is the difference between working load limit (WLL) and breaking strength? WLL is the maximum safe load for normal use, typically 1/2 or 1/3 of the breaking strength. Breaking strength is the force at which the strap will fail. Never use the breaking strength for load calculations.

Can I tie two ratchet straps together to extend length? No, tying knots in the webbing drastically reduces strength and is illegal for load securement. Use a single strap of the correct length. Some straps can be linked with a proper coupling, but only if approved by the manufacturer.

How often should I replace my ratchet lashings? Replace every 5-7 years for occasional use, or every 1-2 years for daily professional use, or immediately if any damage is found.

Are ratchet straps suitable for overhead lifting (crane operations)? No. Ratchet lashings are designed for load restraint, not for lifting. Never use them as lifting slings unless specifically rated and labeled for lifting (which most are not).

Can I use ratchet straps in extreme cold or heat? Polyester remains flexible down to -40°C and up to 80°C. Above 80°C, the webbing softens and loses strength. Do not use near welding, exhaust pipes, or hot surfaces.

What is the best way to store ratchet straps on a truck? Roll them loosely and store in a dry toolbox. Avoid leaving them in direct sunlight or tying them around the trailer frame where they accumulate road spray and UV.

Do I need edge protectors for every strap? If the webbing contacts a corner with a radius smaller than 5mm (0.2 inches), you need edge protection. Any sharp edge, even if not visibly cutting, can damage the webbing under tension.

Can I wash ratchet straps in a washing machine? Hand wash with mild soap and rinse thoroughly. Machine washing may tangle the webbing and damage the ratchet mechanism. Do not dry in a tumble dryer; air dry only.

What is the typical tension force I can achieve with a ratchet lashing? With a standard 400mm handle, you can achieve 250-400 daN (about 560-900 lbs) of tension with moderate effort. For higher tension, use a longer handle or a torque multiplier.

Why do my ratchet straps loosen during a trip? This is normal due to load settlement, vibration, and webbing stretch (polyester has some elasticity). Check and retension after the first 30 miles and periodically. Use straps with higher pre-tension and consider using spring-loaded or ratchet binders for heavy loads.

Can I use ratchet straps on a boat trailer (salt water environment)? Yes, but choose straps with stainless steel or coated ratchets to resist corrosion. Rinse with fresh water after every use. Standard galvanized steel will rust quickly.

What is the maximum number of ratchet straps I can use on one load? There is no maximum, but more straps add restraint. Ensure each strap is independently anchored and tensioned. Too many straps may complicate release.

How do I release a ratchet strap that is stuck under tension? Do not force the release lever if the tension is extremely high. First, use a pry bar to gently increase tension slightly (one more crank), then release the pawl carefully while guiding the handle down. If still stuck, cut the webbing – safety first.

Do ratchet straps come with a warranty? Some quality brands offer a 1-2 year warranty against manufacturing defects. Wear and tear from normal use is not covered.

Can I use a ratchet lashing to secure a motorcycle in a pickup truck? Yes, but use soft loops (tree saver straps) around the handlebars and foot pegs to avoid scratching. Use four-point restraint. Ensure the ratchet does not contact painted surfaces.

What does “LC” mean on a ratchet strap label? LC stands for Lashing Capacity, which is the same as WLL in daN. It is the term used in EN 12195-2.

Are coloured ratchet straps stronger than plain ones? The color does not affect strength; it is used for coding capacity or aesthetics. Red or orange straps are not inherently stronger than blue or yellow ones – rely on the label.

Can I use a ratchet strap as a recovery strap for pulling a stuck vehicle? No. Recovery straps are specially designed with elasticity to absorb shock loads. Using a ratchet strap (static) can cause sudden failure and projectile danger.

How do I know if my ratchet strap meets DOT requirements? Look for a label that states compliance with WSTDA or FMCSA standards. The label must include the WLL and manufacturer identification. If absent, it does not meet DOT rules.

Final recommendation: A quality ratchet lashing is an indispensable tool for anyone who transports cargo. Invest in certified straps from reputable manufacturers, always inspect before use, apply them with proper technique, and follow legal requirements. By doing so, you protect your cargo, yourself, and everyone else on the road. Remember: an insecure load is an accident waiting to happen – take the extra minute to strap it down right.