getting on the water is always an event, but for many water-engineers it begins long before the descent, even in the garage or in the country. Transportation of small-size vessel It's one of the most important things that not only protects your property, but also protects your road safety, and an improperly secured boat can cause serious accidents, damage to the body of your car, or even loss of cargo at high speed.
The questions are all sorts of: how do you distribute weight so you don't damage the roof? What do you do if the boat is longer than the car? How do you avoid a traffic police officer? In this article, we'll look at the nuances of the problem? top-loading (top load), consider the types of fasteners and study the current requirements of the legislation.
We will pay special attention to the physics of the process: aerodynamic resistance and wind loads. At a speed of 90 km / h, the wind load on board the PVC boat can reach 200-300 kg, which requires reliable fixation, and not just "just in case." Let’s take a look at how to turn a complex logistics task into a routine and safe procedure.
Selection and installation of crossbars: the basis of security
The foundation of the entire structure is crossbars (arcs, rails), which take over the bulk of the boat and transfer the load on the power frame of the roof of the car. The use of standard rails without crossbars is strictly prohibited, as they are not designed for point loads and can deform or come off.
For the transportation of boats, the best choice is considered wind-ax They create less noise and less air resistance, and it's important to set them as far apart as possible to increase the footing area. If the boat is long, it makes sense to use an extra one. extensioner Or the third cross.
- 🚙 Type of fastening: Choose arcs with a fix through the doorway or in regular seats (T-slot), avoiding cheap models with soft belts.
- 📏 Distance: The minimum distance between the arc centers must be at least 60-70 cm for uniform weight distribution.
- 🛡️ Protection: Make sure the lower part of the arcs has a soft coating so as not to scratch the roof of the car when vibrating.
When installing arcs, you must observe the timing of the tightening. Too weak fixation will cause the load to shift, and excessive fixation can damage the door seals or roof plastic. After installation, be sure to check the reliability of the mounting, sharply pulling the arc in different directions.
Preparation of the boat for transportation
Before you put a boat on the roof, it needs to be properly prepared. PVC It is critical not to carry them in a fully inflated state with a rigid floorboard floor. When heated in the sun, the pressure inside the cylinders increases, which can lead to rupture of the seams or deformation of the floor.
Metal boats require removal of all removable elements: cans, rundooks, fishing boxes. Any loose objects inside the boat, when braking sharply, turn into projectiles that can penetrate the side, and you also need to drain water if it gets inside, because the extra 20-30 kg can shift the center of gravity.
⚠️ Warning: Never leave chainsaws, sonars or batteries on the rooftop of the boat, and apart from the risk of theft, these items can fall onto the track, creating an emergency for drivers behind.
If you are carrying a boat with an engine installed (which is only permissible for light models and short distances), make sure that the device is securely fixed and the screw is protected by a cover. boat-engine and transport it separately in the trunk or in a special box.
Stowage technology and weight distribution
The most important step is to lay the hull on the crossbars, the boat should lie down with its keel. If the shape of the keel is sharp (as in many metal "Kandak" or keel PVC), direct installation on narrow arcs is unacceptable - this will create a point of concentration of voltage, which can damage the skin.
To protect the body and more evenly distribute the load, special paddings or soft linings from polyurethane Loads also act as fixers to prevent the boat from moving sideways, and when stowed, ensure that the weight is distributed roughly equally between the front and rear crossbars.
Use old bathroom mats or special transporter mats, putting them under the keel. This is cheap and effective in protecting gelcoat and PVC from rubbing.
The bow of the boat should be raised relative to the stern or at the same level, but in no case lowered down. A snuck nose improves aerodynamics and prevents "sticking" during braking. If the boat is heavy, bring in an assistant to avoid dropping it on the roof of the car, damaging the metal.
Belt and sling anchorage schemes
Only certified ratchet straps or high-strength polypropylene cords are used to fix the cargo. Conventional linen ropes or stretching bands (“bangs”) are not categorically suitable - they will not withstand jerk load and vibration.
There are two basic attachment schemes. through-bandingWhen the belt is thrown over the entire body of the boat and is attached to the opposite side of the crossbar or a special fastener on the roof. The second is the fixation for the nose and aft handles (rips) to the power elements of the car body ( bumper, farcope, special hooks).
- 🔒 Main fixation: 2-4 belts across the hull, pulling the boat to the arcs.
- 🔗 Nose insurance: belt from the nose squirt to the front bumper or towing hook.
- ⚓ Feed insurance: belt from the stern to the rear bumper or farcope.
When tightening belts, observe measure. Excessive force can deform the sides of an inflated boat or damage the fiberglass body. The belt should be stretched so that when pressed with your hand it bends 1-2 cm, but does not dangle.
☑️ Checking of anchorages before departure
Rules for the carriage of long cargoes (overhangs)
Often the length of the boat exceeds the dimensions of the car, in this case, the rules for the carriage of long cargo come into force. According to traffic rules, the cargo should not exceed the dimensions of the vehicle in front and rear by more than 1 meter. If the protrusion is larger, you need to install a sign "large cargo" and, in some cases, escort.
To compensate for overhangs, special extension arcs or homemade structures are used, which rely on the trunk lid (assuming it is durable) or the farcop. It is important to understand that a long overhang creates a lever. When braking, the back of the boat will tend to fall, and the nose will tend to rise, putting pressure on the front mounts.
| Parameter | SDA rule | Recommendation for safety |
|---|---|---|
| Overhang from behind | 1 metre | up to 0.5 meters without a sign |
| Overhang in front | 1 metre | Minimize any overhang |
| Breadth of cargo | 2.55 meters | Not wider than a car mirror. |
| Height from the ground | 4 meters | Consider the branches and the power lines |
⚠️ Note: If the load protrudes beyond the rear dimension by more than 1 meter, in the dark or in case of poor visibility, a red light or reflector must be installed at the end of the cargo.
If there is a large overhang, the speed of movement should be reduced; the rearrangement maneuvers should be performed smoothly, without sudden steering movements, since the long "tail" part of the boat has its own inertia and can rock the car.
Control of the road and behaviour on the road
The first 10 to 20 kilometers of the path are test tracks, and during that time, the belt can sit down or stretch a little, stop at the safe side of the road and check the tension of all the nodes, and vibration and oncoming airflow do their job by weakening the initial puff.
Driving styles when carrying a boat on the roof have to change, acceleration dynamics are worsened by sailing, and braking distance increases, and overtaking should be done with extreme caution, given that side winds can sharply pull the car to the side if the boat catches the flow of air.
What to do if the belt starts to whistle?
Whistling belts at speed is a common phenomenon caused by the vibration of the free ends, and the solution is simple: twist the loose ends of the belt with a tourniquet and lock them with tape or special clips, and also helps to lubricate the belt with silicone lubrication, but this is a temporary solution.
Pay special attention to the height of the cargo when entering garages, gas stations or under low-lying road signs and tree branches. The driver gets used to the dimensions of his car, but the added 40-50 cm height is easy to forget, which can lead to the boat being blown off the roof.
The main safety rule: the boat must be fixed at a minimum of 4 points (2 crosses + nose + stern), and all belts must have insurance against spontaneous unbuttoning of the ratchet.
Frequently Asked Questions (FAQ)
Can I transport a boat with pumped cylinders?
You can transport a fully pumped PVC boat, but there are risks. In the sun, the air inside expands, the pressure grows, the seams may not withstand. You better blow the air in front of the road and pump it out on the water. Hard floor (sleigh) is better not to put at all or put partially.
Do I need a “Size Cargo” sign for a boat?
The "KG" sign (square, yellow with a red border) is mandatory if the cargo protrudes beyond the dimensions of the car by more than 1 meter. It is also necessary if the cargo overlaps the signals of turn signals or stop lights, although it is rare for a boat on the roof.
What is the maximum speed allowed with a boat on the roof?
Traffic rules do not set a separate speed limit for vehicles with a load on the roof, if it does not exceed the dimensions of more than 1 meter (then maximum speed 60 km / h).
How to secure the boat if there are no special belts?
You can't use twisted wires, ropes or electrodes, because they don't hold the load, they break. If you don't have any special belts, you should call a tow truck or a freight taxi. Safety is more expensive than the cost of belts.