Safe transportation of a boat is not just a formality, but a critical stage on which the integrity of your property and the safety of other road users depends. Boat straps These are the main fixing element, which takes on all the dynamic loads when driving on rough roads, and errors in the selection or operation of rigging equipment can lead to displacement of the hull, damage to it or, in the worst case, to the fall of the vessel from the platform.
Many boat owners underestimate the importance of quality fittings, relying on old ropes or cheap counterparts bought "for change." tie-string This ensures that the boat stays in place even when it is under emergency braking, and in this article we will discuss in detail the design features of the mechanisms, the differences in materials and the correct mounting technology for different types of hulls.
Understanding the physics of the fastening process will help avoid common mistakes. Ratchett-mechanism It's a tension-intensive thing, but it's important not to overdo it to keep the sides deformed. Choosing the right mounting point and the right tension angle is an art that anyone who knows the basic principles can do.
Design features of screed belts with a snoring mechanism
The basis of any system of fastening is itself wicker-beltThis material is not chosen by chance: it has a minimum tensile coefficient (less than 3%), which is critical for maintaining tension along the way. Unlike nylon, which can be extended under a load of up to 8-10%, polyester provides rigid fixation. The width of the tape usually varies from 25 to 50 mm, and the choice depends on the required tension force.
The central element of the system is ratchet It's a knot that allows you to create forces that are many times greater than the strength of a human hand, and inside the machine is a spring-loaded dog that engages with the gear teeth to prevent reverse movement, and quality machinery is made of zinc alloy or stainless steel to withstand constant contact with water and salt.
Snoring mechanism device
Inside the rattle is a return spring, and if it bursts or sours from the dirt, the mechanism can spontaneously unlock, and lubricate the moving parts regularly with silicone grease.
The ends of the belt are equipped with fasteners, most often hooks. S-hooks It is important that the hooks have spring-loaded protection or are made in the form of locks that prevent accidental slipping from the eyelids of the trailer.
When buying belts, pay attention to the WLL (Working Load Limit) marking, which is the workload limit. Don't confuse it with the burst load, which is 2-2.5 times higher.
Materials and protection against aggressive environment
The operation of the boat trailer is inevitably associated with contact with water, which creates ideal conditions for corrosion and mold. polyester Often undergoes a special hydrophobic impregnation, repelling moisture and dirt, if the belt is wet, it should not be dried in the open sun when folded, as this can lead to mold inside the tissue layers.
The metal parts must be made of rust-resistant materials. chromium steel is a budget option that will not last long when actively operating in salt water. stainless steel AISI 304 or AISI 316, the latter is particularly recommended for marine applications, as it contains molybdenum, which increases resistance to chloride.
⚠️ Warning: Do not use uncoated steel hooks on aluminum trailers. When vibrating, galvanic corrosion will quickly destroy the trailer's attachment points. Use plastic-coated or stainless steel hooks.
The sewing threads that make the hinges and fasteners must also be ultraviolet resistant, and the cheap ones burn out quickly and lose strength, becoming brittle. tie-belt have reinforced seams, often duplicated or protected by plastic linings in places of greatest friction.
Specifics of fastening PVC boats and plastic housings
The mounting of inflatable boats and rigid hull boats (RIBs) has its own specifications, the main task is to distribute the pressure so that the cylinders or fiberglass are not damaged. PVC You can't use belts that are thrown directly through inflated cylinders without protection, and the pressure at the point of contact can exceed the limit, especially in hot weather, when the air inside expands.
The optimal attachment scheme for soft housings involves the use of special paddings or inflatable keel sections that take on the main load, in which case the belts lock the boat behind transom plates or special rim bolts located in the bow. soft-stretch from rubber or dense foam in the places of contact of the tape with the sides.
For plastic and fiberglass boats, it is critically important not to create spot loads on the thin side. Flying tape If the trailer design allows, it is better to use a system of four belts: two on the nose and two on the stern, creating cross tension that extinguishes the lateral oscillations.
☑️ Pre-departure checks
Technology of correct tightening and placement scheme
The process of fixing the vessel on the trailer requires a consistent approach, first the boat is mounted on the keel or the slack, then the bow rest is fixed. tie-beltFirst, all the belts are slightly stretched to remove the sags, and then the final puff is made.
The tension angle of the belt relative to the horizontal plane should be from 30 to 45 degrees. If the angle is too sharp, there is a risk of the boat being separated from the supports when passing irregularities. If the angle is too flat, the boat can lead to the side by side wind or maneuver. The ideal scheme is when the belts form a kind of “eight” or cross, pressing the sides of the trailer.
When working with the ratchet mechanism, it is important to observe safety precautions. A sharp slip of the handle can lead to serious injury to the fingers. When finishing the puff, make sure that the grip of the rattle is folded and fixed in the closed position so that it does not open from the wind.
⚠️ Warning: Never use the extension cords (pipes) on the grip of the ratchet to create more force. This can cause the mechanism to break or the tape to break, which can lead to rebound parts.
Comparative table of belt specifications
The choice of a particular model depends on the weight of your boat. Below are the data that will help you navigate the range. Remember, the safety margin should be significant.
| Type of belt (width) | Workload (WLL), kg | Breaking load, kg | Recommended weight of the boat | Type of mechanism |
|---|---|---|---|---|
| 25 mm | 400 | 1000 | 300 kg | Plastic/Metal |
| 35 mm | 800 | 2000 | 300 - 600 kg | Metallic |
| 50 mm | 1500 | 3500 | 600 kg | Reinforced metal |
| 75 mm (spoke) | 3000 | 6000 | Boats and yachts | Industrial |
From the table it is clear that for most inflatable boats with an engine belt width of 25-35 mm is enough, however, for heavy boats with a hard bottom and powerful engines, you can not save on the width of the belt. Safety margin This is a guarantee that when you jerk the belt will not burst, but only stretch.
The rule of four belts: for a reliable fixation of one boat, it is minimally necessary to use 4 mounting points (2 front, 2 rear), even if the weight of the vessel allows you to do two.
Care, storage and diagnosis of wear
Even the best quality tie-belt They need to be maintained. After each trip, especially at sea, they need to be rinsed with fresh water. The salt, when dried, crystallizes in the fibers of the fabric and on the machinery, acting as an abrasive and a catalyst for corrosion.
Regularly inspect the tape for scuffing, filament breaks and fading. polyester It's hard or it's got local damage, it's better to replace it, and the mechanisms also need to be checked: the gear teeth should not be slithered, and the spring should confidently return the dog to its original position.
The straps should be stored in a dry place, rolled up in coves, but not overstretched. Prolonged storage in a highly strained state can lead to irreversible deformation of the fibers and loss of elasticity. Use special bags or storage boxes to protect the metal from dust.
How do you check the wear of the hook?
Swipe your nail around the inside of the hook. If you feel burrs or sharp edges that can cut the fabric, you either need to clean the hook with a file or replace it to avoid damaging the belt.
Can you use conventional car belts to fasten the boat?
Technically, you can, if they have a loading capacity that matches the weight of the boat, but car belts are often shorter and may not have hook protection, and they can be too rigid and damage the sides of the boat when under heavy tension.
How often should I change my belts?
The service life depends on the intensity of operation. When using the belts actively (every weekend) and in contact with salt water, it is recommended to change the belts every 2-3 seasons.
What to do if the belt is twisted in the mechanism?
Don't try to force the ratchet. Completely unlock the mechanism, pull the tape, straighten it and re-tuck it into the slit of the drum strictly in the direction of movement.
Which belt is better: with a plastic or metal ratchet?
Metal ratchets are stronger and more durable, can withstand heavy loads. Plastic is lighter and does not rust, but can crack in the cold or on impact. For heavy boats, choose only metal.