The question of what is called cargo-tieThis is often the case for drivers, logisticians and owners of commercial vehicles at a time when it is necessary to reliably fix the objects being transported. In professional environment and specialized stores, this tooling is most often called load-belt or Ratchet Straps (in English), which literally translates as "belts with a ratchet mechanism". However, in everyday life you can find many synonyms: from simple "knitches" to "fixers" or "tensioners", which sometimes leads to confusion when ordering equipment.
The right choice rigging It is critically important, since road safety and safety of transported valuables directly depend on it. An improperly selected belt can burst in the way, and a weak mechanism will not be able to hold a heavy load during a sharp braking. In this article, we will discuss in detail what types of fasteners exist, how they differ and what you need to pay attention to when buying.
The main function of this device is to create and retain tension that presses the object against the vehicle platform. Textile belts Polyester fibers in conjunction with metal mechanisms are the industry standard due to their strength and resistance to stretching. Understanding exactly how this system works will help you avoid traffic fines and potential accidents on the track.
Official terminology and classification
In technical documentation and regulations governing freight, the term is most often used. cargo-belt. This is the official name that appears in the catalogues of manufacturers and certificates of conformity. However, the classification may be broader and depend on the type of tension mechanism used. For example, there are belts with snoring-mechanism (patchet), which allow you to create a significant effort, and simpler options with eccentric (cam buckle) intended for light cargo.
In the professional environment, the term can also be used. rigging-belt. This is a broader concept that includes not only screeds, but also slings for lifting, rolling and moving cargoes by cranes or telfers. It is important not to confuse these concepts: screeds are designed to fix a static object on the surface, while slings work to tear when lifting. For road transport, the key parameter is workload (LC) which indicates how much weight the belt can withstand when strained.
The material for the tape is usually polyester (PES), less often - polypropylene or nylon. Polyester is not chosen by chance: it has a minimum tensile coefficient (less than 3-4%), which ensures that the load does not weaken in transit. Nylon, on the other hand, stretches harder, which can be dangerous when transporting heavy objects that require rigid fixation.
There are also specialty types such as belts with tensioner in the form of winches for super-heavy loads or chain screeds for especially sharp edges. The choice of a specific type depends on the nature of the cargo: whether you are transporting building materials, cars, pipes or household appliances.
- 🏗️ Cargo tidal belts The main term for fixation on transport.
- ⚙️ Rigging belts - the common name for lifting and fastening slings.
- 🔗 Tensioners The elements of the mechanism that create the effort.
It is important to note that each certified belt should have a marking that contains information about the manufacturer, workload and date of manufacture. Lack of tags or labels on polyester This is the basis for prohibiting the use of such products in commercial transportation.
Design and arrangement of the machinery
To understand how the screed works, you need to consider its design. The main element is ratchet (patchet), which consists of a body, handle, gear wheel and a retainer. It is this node that allows you to transform the operator’s physical effort into a powerful tension of the tape. The quality of the metal and the assembly of the mechanism directly affects its durability and safety.
The second key component is the tape itself. It has a certain width (usually 25 to 100 mm) and thickness. At the ends of the tape are located terminal: hooks, rings or loops. Hooks can be standard, gripping (G-hook) or flat, depending on what exactly the hook will be made on the car body. Often a combination is used where on one side the belt is rigidly sewn into the mechanism, and on the other has a free end with a hook.
⚠️ Warning: Never use a belt if the belt has cuts, scuffs more than 10% of width, or if the teeth of the snoring mechanism are deformed. Operation of damaged tooling can lead to instant rupture under load.
Some models are equipped with additional protection elements, for example, corners to protect the tape from rubbing on the sharp edges of the cargo. This is especially true when transporting metal structures or equipment with sharp angles. There are also mechanisms with a quick detachment function, which speeds up the unloading process, but requires care when tightening.
The principle of operation is simple: the free end of the tape is passed through the slot in the ratchet shaft, after which rocking movements are made with the handle. The teeth of the mechanism prevent reverse rotation by fixing tension. To release the cargo, you need to press a special lever-fixer that unlocks the shaft.
Types of fasteners and hooks
Choosing the right hook is half the success of a reliable fixation. The most common option is hook (G-hook) which is shaped like a letter "G". It is designed to engage round or profile elements of the body. Its design allows the hook to self-latch, minimizing the risk of slipping when vibrating.
For attachment to rigging or rings located in the floor of the body or on the platform, flat hooks or hooks with a latch are used. They are flatter in shape and often feature a spring-loaded foot that physically blocks the hook from exiting the loop. This is the most reliable option for heavy loads, where the risk of slipping is unacceptable.
There are also specialized clips, for example, for fixing wheels when transporting cars or tensioner with two free ends, where the mechanism is in the middle. These belts are called two-piece. They are convenient in that they allow you to adjust the length on both sides, but require more time to install.
The hook material is usually wrought or cast steel with zinc or chrome coating to protect against corrosion. It is important to check the condition of the latch spring: if it is weakened or rusted, the hook becomes dangerous. In some cases, when standard hooks do not fit, they are used. intermediate or extension chains.
- 🔗 G-hook - universal trap hook for the sides.
- 🛡️ Flat hook. - to fit into the rigging loops.
- 🚗 Wheel hook - specific form for motorists.
Selection and load calculation
When choosing a sleeve, the main parameter is workload (LC - Lashing Capacity). It is indicated in kilograms or tons and indicates the maximum weight that the belt can hold in a strained state. Not to be confused with the burst load, which is usually 2-2.5 times higher, but using a belt at the breaking point is strictly forbidden.
For passenger cars and small trailers, belts with a load of 250 to 500 kg per belt are usually sufficient. For commercial vans and motorcycle transportation, the best options are 1000-1500 kg. Heavy machinery and construction materials require tie-string with a load of 2000 kg and above, often with a band width of 50 mm or more.
The length of the belt also plays a role. Too long belt is inconvenient to wind and store, and a short one may not reach the fastening points. Standard length varies from 2 to 10 meters. When choosing a length, consider the method of attachment: a diagonal requires less length than for encircling the cargo around the perimeter.
| Type of cargo | Recommended load (LC) | The width of the ribbon | Type of mechanism |
|---|---|---|---|
| Furniture, appliances | 250 - 500 kg | 25 mm | Eccentric/Snoring |
| Motorcycles, snowmobiles | 500 - 1000 kg | 35 mm | grating |
| Construction materials, pipes | 1500 - 3000 kg | 50 mm | Increased snoring |
| Special equipment, containers | 5000 kg and above | 75-100 mm | Swan/Snoring |
Always keep a small margin of strength. If the estimated weight of the cargo is 800 kg, it is better to take a belt with an LC 1000 kg than to risk with a minimum limit. This rule is particularly important for dynamical, which occur during braking.
Technology of correct fixation of cargo
The fastening process begins with an inspection of the hook points on the body and the cargo itself. Make sure the hinges or sides can withstand the force created. Pull the belt through the load or throw it over the top, hooking hooks from opposite sides. It is important that the tape is not twisted, as this reduces its strength to 30%.
Stretching the belt evenly, making swinging movements with the handle of the mechanism. When the tension is sufficient (the load will stop wobbling, but not deformed), fix the handle in the closed position. Collect excess tape in the coil and fasten with special rubber bands or put it in your pocket so that they do not hang out in the wind.
☑️ Checklist of safe fixation
When transporting goods with sharp edges, be sure to use corners Or a thick cloth lining. They will prevent the polyester tape from being cut during movement due to vibration. If the load is high, it is recommended to use at least two cross-stitched screeds to prevent displacement in either direction.
After the first 15-20 kilometers of the path, be sure to stop and check the tension. Polyester has the property of a little "sitting down" under the initial load, and additional lifting may be required. It's standard procedure for everyone. sling-sling.
⚠️ Warning: Never stand in the plane of a stretched belt when it is tightened or released. In the event of a break or slide of the hook, the released energy can cause serious injuries.
Care, storage and service life
Despite its high strength, polyester They need to be treated with care. The main enemies of the material are ultraviolet, aggressive chemicals and abrasive friction. After use, it is advisable to clean the belt from dirt and dust, especially if the transported building mixtures or chemicals.
Store screeds should be in a dry, ventilated room, away from direct sunlight. Wet and dirty tape, rolled in a tight coil, can be covered with mold, which will destroy the fibers from the inside. Metal mechanisms are recommended to be lubricated periodically with light engine oil to prevent corrosion and jamming.
How do you determine the wear of the belt?
Take a good look at the tape. If you see that the surface threads are heavily wiped, the internal structure is visible, there are melts or chemical burns - the belt is subject to disposal. Also a sign of wear is a jamming mechanism or deformation of hooks that have ceased to fit tightly to the surface of the hook.
The service life of screeds is not limited to calendar years, but depends on the intensity of operation. However, if there are any doubts about the strength, it is better to replace the tooling. The cost of a new belt is incommensurable with the damage from damage to the cargo or an accident caused by its fall.
Use the extension of the service life cover-case on the mechanisms during storage and try not to throw the belts on the ground where they can pass the wheels of the car. Careful attitude to rigging is a sign of the professionalism of the driver.
Frequently Asked Questions (FAQ)
Can I increase the load belts if there is not enough length?
It is not recommended to stitch or tie cargo-belt on their own. Any violation of the integrity of the tape reduces its strength in the crosslinking node to 50-60%, which makes use dangerous. It is better to purchase a belt of the desired length or use two separate belts in a bundle, if the construction of the load allows.
What is the difference between the belts for cargo from the slings 1PC?
Slings 1PK (Hinge) are designed to lift loads with a crane and have a margin of tensile safety, a multiple of 7. Flying belts They are held and have a lower reserve ratio (usually 2.0-2.5), but are equipped with tension mechanisms. Using screeds to lift cargo with a crane is prohibited!
What temperature does the polyester tape withstand?
Standard polyester retains its properties in the range from -40 ° C to +80 ° C. At higher temperatures, the strength of the material decreases, and when in contact with an open fire or sparks from welding, the tape instantly burns out. Use it for welding work. heat-protective or chains.
Can you wash your belts with water?
Yeah, polyester It's not afraid of water or rotting. However, dry the belts should be spread out at room temperature, away from heating devices. Washing in the machine is prohibited, as aggressive powders and mechanical exposure can damage the structure of the fibers.
What to do if you jammed the snoring mechanism?
Do not use excessive force or hammer. Try to clean the mechanism of dirt, blow with compressed air and lubricate with penetrating lubricant (for example, WD-40). If the mechanism is physically damaged (a broken tooth), it must be replaced or disposed of.