Fishing or resting on the water become much more comfortable when a full-fledged swimmer appears in the arsenal of the swimming tool. backseatStandard inflatable boats rarely provide comfortable seats for long periods of sitting, limited to rigid banks or inflatable cushions, which is why making a bracket for a chair in a PVC boat yourself becomes one of the most popular tasks for owners of such vessels.
Self-production of this element allows not only to save the budget, but also to adapt the design to a specific model of the boat and personal anthropometric data. support-post This will ensure stability and safety, which is critical when pitching or sharp maneuvers, and in this article we will look at all the steps in creating a reliable mount from the selection of materials to the final installation.
The main goal is to create a device that will withstand dynamic loads and will not damage the side or bottom of your vessel. Many beginners make errors in the calculation of loads, which can lead to failure of the structure directly on the water. To avoid risks, you must strictly follow the technology and use only proven ones. metallic profiles And fasteners.
Selection of materials and tools for manufacturing
The first step in creating a reliable fastening is the right choice of materials, the basis of the design must be made of metal that is resistant to corrosion, because contact with water and humid air is inevitable. stainless steel AISI 304 or AISI 316, but it is quite expensive, and a more affordable alternative is D16T aluminum, which is easier to process at home.
If you use conventional ferrous metal, you need quality powder paint or galvanizing, but even these do not give a hundred percent guarantee against rust in an aggressive marine environment. To connect the elements, you will need welding: argon for aluminum or a semi-automatic for steel. You will also need a set of locksmiths, including a Bulgarian, a drill and a metal drill.
It is important to pay attention to fasteners, as they take on the main load. Bolts should be of strength class not lower than 8.8, but preferably 10.9. All threaded connections are recommended to fix with grover washers or anaerobic fixers, so that the vibration of the engine does not weaken the structure.
- 🛠️ Metal pipe profile 40x20 mm or 50x25 mm for the main rack.
- 🔩 Bolts, nuts and washers made of stainless steel with a diameter of M8 or M10.
- 🎨 Anti-corrosion primer and paint to protect welds.
- 📏 Roulette, coal and marker for accurate marking of parts.
⚠️ Note: When using aluminum alloys, it is strictly forbidden to use steel shavings or tools after working with ferrous metal, as this will cause instant electrochemical corrosion.
Design and calculation of loads
Before cutting metal, you need to create a sketch or drawing of the future product. The bracket for a chair in a PVC boat must take into account not only the weight of the angler, but also the dynamic loads that arise when moving along the wave. The standard design load for one seat is a minimum of 120-150 kg with a margin of safety.
Structurally, the rack can be made in the form of a letter "T", "G" or a complex frame system. For inflatable boats, the safest option is to attach to the mounting of the mount. graffiti or slot-bankDirect attachment to an inflatable cylinder without a rigid base is unacceptable, as this will lead to deformation of the side and loss of leakage.
The height of the rack is calculated individually. The standard height of the seat from the floor of the boat is 40-45 cm. If you plan to use a chair with a rotary mechanism, you need to lay an additional distance for the installation of the mechanism itself. The width of the base should ensure stability and not allow the chair to roll over when rolling.
When you design, consider that the seated person's center of gravity is shifted back relative to the foot attachment point, and this creates a significant lever that will try to pull the bracket out of the mounts, so the vertical rack should have a sufficient cross section, and the horizontal supports should have the maximum contact area with the floor or transcreant.
Step-by-step instructions for the assembly of the structure
The fabrication process begins with cutting the workpieces according to your drawing. Use a metal-thin-disc Bulgarian to keep the cutting edges smooth and require minimal processing. After cutting, all sharp edges must be cleaned with a file or grinding wheel to avoid injury and damage to the PVC material of the boat.
The next step is to build the frame, and if you're welding, the best thing to do is to connect the elements together into a single structure, and for aluminum profiles without welding, you can use powerful bolts using the corners of the scarf, and the docking angles should be strictly 90 degrees, check this with the coalstone during the assembly process.
The upper floor of the bracket is installed pivotIts mounting should be done on 4 bolts. If there is no finished site, it can be cut from a sheet of metal 4-5 mm thick. The sheet drills holes corresponding to the mounting holes of the chosen chair (usually this is a standard step).
☑️ Pre-welding check
The final processing involves grinding welds and painting. Even if you use stainless steel, welds lose their corrosion-resistant properties and require protection. Use specialized high-zinc aerosols to cold-dip the seams before finishing.
| Parameter | Optimal value | Minimum allowable | Note |
|---|---|---|---|
| Thickness of pipe wall | 2.0 - 3.0 mm | 1.5 mm | A smaller thickness can be deformed |
| Diameter of the bolts of the attachment | M10 | M8 | Strength class not less than 8.8 |
| Seat height | 45cm | 40cm | From the floor of the boat to the seat |
| Structure weight | 2.5 - 4 kg | - | Depends on the material. |
Installation of the bracket in the PVC boat
Installation of the finished product in the boat requires care. slab-stove (plywood or aluminum sheet on the transom), the attachment is made directly to it, in this case, it is important not to damage the PVC cylinder itself, so all fasteners should be limited in length or have protective caps.
To attach to the floor (soft paiola), you use a system of hooks or special platforms that spread the load over a large area. You can't just fasten the bracket to the inflated bottom, it will fail. Often you use the method of attaching to the stringer tubes, if the boat design allows it.
When mounting on the transom plate, holes are drilled through which bolts are passed. Wide washers or response plates are necessarily used on the inside of the transom (from the water side) so that the bolt head does not damage the PVC when in contact with water or when stored. Bolt threads that come out should be closed with plastic plugs.
⚠️ Warning: Never drill holes in inflatable tubes or the bottom of a boat to install a bracket. This will break the tightness and result in the loss of warranty on the product.
Ensuring security and sustainability
Safety on the water is priority number one: the bracket should not have protruding sharp corners that you can hurt yourself when you fall or roll, all the ends of the pipes should be covered with plastic plugs or welded and sanded.
Stability testing is done on land. Sit in a chair mounted on a bracket, and try to actively fidget, simulating fish fishing or swinging. The structure should not creak, luft, or shift relative to the attachment points. Any suspicious sound indicates insufficient tightening or weak geometry.
Pay special attention to fixing the chair on the rotating mechanism. If you use a spring mechanism, make sure that it is reliably latched. In the movement of the boat, the chair should be fixed at the course, so as not to cause injury during sharp braking.
- 🔒 Check the bolt tightening regularly before each outing.
- 👀 Check the welds for cracks or corrosion.
- 🧼 After fishing, be sure to rinse the bracket with fresh water, especially after seawater.
Care and maintenance of metal construction
Metal products in water use require constant maintenance. stainless steel It can be covered with plaque and subject to spot corrosion if not monitored, and after each season, it is recommended to remove the bracket, clean it of dirt and salt, and perform an audit.
If you've used dyed ferrous metal, inspect the chipping coating. Any chip is a hotbed of future rust. It needs to be cleaned, degreased, primed and painted, and ignoring minor defects will cause the entire structure to collapse quickly in 1-2 seasons.
Mobile parts, such as the rotary mechanism, need lubrication. Use consistent lubricants that are not washed away by water, such as lithium lubricants or special formulations for marine equipment. Regular maintenance will extend the life of your homemade device for many years.
Frequently Asked Questions (FAQ)
Can I install a bracket on a boat without a hard transistor?
The soft transom is only possible with special platform adapters that rest on the bottom and side to distribute the load. Direct attachment to PVC is prohibited.
How much weight can a homemade aluminum bracket withstand?
With proper calculation and use of the profile of 40x20x2 mm and more, the design calmly withstands a static load of up to 200 kg, which exceeds the weight of the average person with a margin.
Do I need to remove the bracket when transporting a boat?
It is advisable to remove so as not to damage the PVC tubes when stowed, and if the design allows, you can only remove the top part with the seat, leaving the base in the boat.
How to replace the welding if there is no equipment?
You can use powerful bolt joints with scarves of the same metal, the main thing is to ensure that the parts fit tightly and use a thread lock.