Transportation of the boat is always stressful for the owner, especially if the route runs on high-speed routes or difficult roads with poor surface. Boat screed In this context, it becomes not just an accessory, but a critical safety feature to prevent the boat from being displaced, damaged or, worse, an emergency situation on the road, and a properly selected locking system ensures that your boat reaches the water intact, preserving the geometry of the hull and attachments.
Many beginners mistakenly believe that it is enough to tie the boat with a rope, but modern requirements for transportation dictate their own rules. PVC materials And aluminum alloys require different approaches to pressure distribution to avoid strain, and in this article, we'll go into detail about what types of screeds exist, how to organize the anchorage points, and why. Protection against sagging (anti-sag) It is a prerequisite for long boats when moving at high speed.
Why You Need a Professional Fixing System
Using homemade ropes or cheap textile strips without tensioners can lead to loss of tightness of the fasteners after a few kilometers. screed is equipped with a ratchet mechanism, which allows you to create a controlled tension, independent of the extensibility of the material.
In addition, specialty belts often have protective inserts or are made of materials that do not absorb moisture and are resistant to ultraviolet light. PVC fabricThe robust fixation also prevents the centre of gravity of the trailer from shifting, which directly affects the handling of the tractor vehicle.
⚠️ Warning: Never use conventional household ropes or laundry cords to fix a boat on a roof or trailer - their tensile strength and resistance to dynamic loads are not sufficient for safe transportation.
At speeds above 60 km/h, the oncoming airflow creates a lift that tends to pull the bow off the stop, and a well-mounted screed pairs with a bowrest, pressing the vessel against the lodging or keel of the trailer, neutralizing wind loads.
The main types of screeds and their specifications
The market for water accessories offers many solutions, but all of them can be divided into several key categories by type of mechanism and design. strap-string They have ratchet straps that allow tension forces of 200 to 500 kg or more, and they're ideal for fixing the body to the sides of the trailer.
The second popular option is the elastic harnesses with carabiners, often called "tents" or "nets", which are not designed to fix positions rigidly, but they do a great job of anchor points for awning or additional insurance for inflatable tubes. tensionerThey are able to compensate for the weakening of the belt when vibrating.
- 🔗 Fork-tree screeds: provide maximum force, have a metal body, require caution when working with PVC, so as not to damage the cylinders with sharp edges of the mechanism.
- 🪢 Friction buckles: allow you to quickly fix the cargo without using a rattle, the tension is limited by the physical capabilities of a person, suitable for light boats.
- 🛡️ Protective covers: Many modern models of screeds are equipped with soft linings on hooks and the belt itself in the contact zone with the sides of the boat.
When choosing between types of anchorages, it is important to consider the material of the sides of your vessel. Metal hooks can easily damage inflatable tubes, so for PVC boats it is preferable to use systems with soft loops or S-shaped hooks with rubber braiding. Aluminum boats are less demanding, but it is important here to avoid scratching on the sides, which in the future can become centers of corrosion.
When choosing a screed, pay attention to the width of the ribbon: 25 mm is enough for boats up to 4 meters long, for heavier and more overall models it is better to use 50 mm - they are cut less by sharp angles and create a larger contact spot.
Manufacturing materials and environmental resistance
The aggressive environment is the main enemy of any equipment, salt water, gasoline, oils, solar ultraviolet light and temperature changes quickly destroy poor-quality materials. screed It must be made of polyester fiber (polyester), which, unlike nylon, practically does not absorb water and does not stretch under load when wet.
Metal elements — carbines, hooks, ratchets — must have anti-corrosion coating. stainless steel Or galvanized alloys with a galvanic coating, cheap metal will quickly become rust after the first trip to the sea, which can lead to jamming of the mechanism or loss of strength.
| Materials | Water resistance | Extensibility | Recommended application |
|---|---|---|---|
| polyester | High (not absorbent) | Minimum (<3%) | Main boat fixation |
| nylon | Medium (absorbing up to 10%) | High (up to 8%) | Temporary fixation, tents |
| Polypropylene | High. | Medium | Mooring, not for screeding. |
Special attention should be paid to the seams and joints of the tape with metal elements. Double or triple stitching with synthetic threads ensures that the belt does not go rags after several cycles of tension. Cheap analogues often have a single seam, which is the weak link of the entire design.
Installation rules and anchorage points
The process of fixing the boat on the trailer requires a certain sequence of actions, first the vessel is mounted on the pawns or rollers, then fixed with a nose stop. boat-tieIt's important to distribute the forces symmetrically so that you don't skew the body.
The optimal attachment pattern involves the use of at least two fixation points on each side in the aft and middle part. The belt should cover the cylinder or side at an angle, creating a pressing force down and slightly inwards. The belt should not be rubbed against sharp corners of the transom or engine elements without protection.
☑️ Checklist before departure
⚠️ Attention: It is strictly forbidden to pass the screed tape directly through oars, switches or plastic decor elements - with strong tension or vibration, they can be broken or cut off.
If you use a trailer without sides, and the boat has wide cylinders, it is recommended to use special expanders or soft linings. This will increase the contact area and reduce the point pressure on PVC. For metal boats, the contact points of the belt with the sides are better protected with paint tape or special linings to preserve the paint coating.
Protection against sagging (Anti-Sag) during transportation
One of the most common problems in the transport of inflatable boats longer than 3.5 meters is the effect of "hammock" or sagging of the bottom between rigid elements (transom and banks) under the influence of the oncoming air flow. anti-sag the problem, can lead to deformation of the bottom and even tearing tissue in places of greatest tension.
To address this, there are special bottom support systems, which are belts that are passed under the boat and connected to the main screed or the sides of the trailer, creating a support net. Some boat manufacturers integrate special belt rings directly into the cylinder design.
Why is sagging dangerous for PVC boats?
When driving at high speed, the air pressure under the bottom of the boat drops (the Bernoulli effect), while inside the cylinders it remains high. The pressure difference tends to bend the bottom inside the boat. If there is no support between the hard deck and the ground of the balloon, the fabric can burst, and the decking can shift or deform.
inflatable floor boat owners should be especially careful. Although the design of the BND is more resistant to pressure drops, prolonged transportation with sagging can disrupt the geometry of stringers. The use of support belts or simply tight fit of the pad along the entire length is a prerequisite for long journeys.
Maintenance and storage of screeds
Like any equipment, screed belts require maintenance. After each departure, especially if it has been at sea or in rainy weather, the tapes must be dried. Wet polyester rolled up in a ball can become molded, which will destroy the structure of the fiber from the inside. Metal mechanisms should be wiped with dry rags and periodically lubricated moving parts.
Keep screeds straightened or neatly rolled up in a dry place protected from direct sunlight. Ultraviolet is the main enemy of synthetic fibers, making them brittle over time. Regularly check the condition of the tape for scuffs, cuts and melts.
- 🧼 Cleanup: Contaminated belts can be washed with warm water with soft soap, the use of aggressive chemicals is prohibited.
- 🔍 Inspection: Before each season, carefully examine the teeth of the ratchet and the axis of rotation for cracks or corrosion.
- 🔄 Replacement: If you detect breaks of threads or deformation of metal screed should be replaced immediately, repair in this case does not guarantee safety.
Proper storage extends the life of accessories by many times. Don't throw belts in a pile with anchors and other heavy objects in the trunk - sharp edges can damage the tape during shaking. Use separate bags or gear compartments.
Regular checks of the condition of the screeds and proper storage after the season is a guarantee that at a critical moment on the track the belt will not let down and keep your boat on the trailer.
Can I use one sleeve for the whole boat?
It's not recommended to use one screed across the hull, so it creates a load concentration point that can deform the boat, and it doesn't provide a reliable lock from the forward and backward shift, at least two anchor points on the sides.
How often should you tighten your belts on the way?
After the first 10-15 kilometers of traffic, it is recommended to stop and check the tension. Polyester is almost not stretched, but the boat itself can recline a little on the trailer.
Are metal hooks dangerous for an inflatable boat?
Yes, when vibrating and tensing, metal can cut through PVC. Always use hooks with rubber linings or put soft cloth or special protective covers under the belt at the point of contact with the sides.
What to do if the mechanism of the ratchet is jammed?
Try to relax the tension a little to free the mechanism, and treat it with penetrating lubricant (WD-40), after clearing the sand and dirt. If the mechanism is damaged, replace the entire screed.