Operation of inflatable boats in the summer is rarely without protection from the scorching sun or sudden rain. PVC boat tent frame It is becoming an indispensable element of equipment, providing comfort and safety for crew during long parking or fishing, and the lack of a quality canopy can lead to heat stroke, as well as accelerate the degradation of rubber and glue under the influence of ultraviolet light, which is why many owners are thinking about creating or buying a reliable structure that can withstand wind gusts.
Self-manufacturing allows not only to save the budget, but also to adapt the geometry of the canopy to a specific model of the vessel and individual needs. Tent shelter It can be made in a variety of ways, from a simple visor over the cockpit to a full-fledged chassis with tarpaulin sides, and the key here is to choose a durable but lightweight material for the arcs that will not damage the cylinders when rolling.
In this article, we'll go into detail about what's best to build a base, how to calculate the dimensions and what nuances to consider when installing. A well-designed frame will turn your boat into a cozy shelter on the water. Let's look at the basic steps in creating reliable weather protection.
Selection of material for power frame
The basis of any canopy is its supporting skeleton, which must be sufficiently rigid to keep the shape of the fabric under the pressure of the wind. The most popular solution among water engines is polypropylene pipes, in particular, brands of polypropylene. PP-RThis material is affordable, easy to process and critically inert to water and corrosion, and often uses fiberglass reinforced pipes to reinforce the structure, which withstand higher temperature loads and have a lower linear expansion coefficient.
An alternative to plastic is duraluminium or stainless pipes. aluminum frame It's traditionally considered more durable and durable, but it's harder to install without a special tool (tube bender) and can oxidize when it comes into contact with salt water, and plastic is easily cut with a hacksaw, and the joints are made with fittings or homemade inserts, depending on whether you plan to store the structure as assembled or disassemble it after each fishing trip.
When choosing the diameter of the pipes should focus on the area of the future canopy. For small visors with a diameter of up to 1 meter, a 20-25 mm pipe is quite suitable. If you make a full-fledged running awning that covers the whole boat, the diameter of the carrier arcs should be at least 32 mm, and preferably 40 mm. It is critical to use pipes with a wall thickness of at least 4-5 mm to ensure wind resistance of the structure. Thin-walled products can burst in a strong gust of wind, turning the awning into a sail that can turn the boat over.
Design and sizing
Before you buy materials, you need to create a clear design. A mistake in the calculations at the drawing stage can lead to the fact that the finished frame will mow the boat or interfere with the control of the engine. The standard scheme involves the installation of two or three cross arcs connected by longitudinal elements. The height of the pillars should allow free movement of people in the cockpit in a sitting position, usually 1.2-1.5 meters from the floor level.
When designing, consider the engine's departure and tiltability, the design should not interfere with engine maintenance or the lifting of the lower unit, and it is also important to provide attachment points to the cylinders. Fixing of the frame It should be distributed evenly so as not to create points of excessive pressure on PVC. Often use the dips installed on the transom and on-board cylinders, or special hinges sewn to the stringers.
To accurately calculate the length of the arcs, you can use a simple geometric formula or create a template from a flexible cord right on an inflated boat, which will allow you to visualize the dimensions and see if the awning will touch the fish or rest on the oars. The width of the base should be just a little bit the maximum width of the cylinders at the place of the racks to ensure verticality or a slight blockage of the racks outwards for stability.
Formula for calculating arc length
If you're making an arched awning, the arc length is calculated as half the perimeter of the ellipse, or in simplified terms: L = (width * 1.5) + lift height. This is an approximate value that allows you to buy a material with a margin.
Necessary tools and components
To build a polypropylene pipe structure, you need the minimum set of tools that most men will find in the garage. The main cutting work can be done with a manual hacksaw on metal or a special pipe cutter knife that gives a smooth cut without barbs. To connect the elements, you will need a soldering iron for polypropylene pipes with nozzles of the appropriate diameter, or carving / glue fittings if soldering is not possible.
- 🛠️ Metal knife or pipe cutter for accurate cutting of blanks.
- 🔥 A soldering iron for PP pipes (if a welded structure is selected).
- 📏 Roulette, marker and coal for marking cuts.
- 🔩 A set of wrenches for mounting bolt connections to the boat.
- 🧵 Strong capron thread or slings for temporary fixation during fitting.
Don't forget the boat attachment. It can be metal corners, clamps, carbines, or special plastic clips. If you use welding, make sure you have spare tees and corners. fittings must be of high quality, without cracks and injection molding, as they carry the main load on the rupture.
You'll also need a fabric tool if you sew an awning yourself, you need powerful scissors, a sewing machine with a foot for thick fabrics, and perhaps a building hair dryer to work with luvers. All metal elements that can come into contact with wet fabric or cylinders, better to treat with anticort or paint to avoid rust stains.
Step-by-step instructions for assembling the frame
The assembly process starts with cutting the pipes according to your drawings, and it's recommended that you cut all the pieces with a small margin first, and then fit them in place, and you should build them on a flat surface, after inflating the boat to the working pressure, to take into account the real geometry of the cylinders, first the side pillars are assembled, then they are joined by crossbars, forming arches.
☑️ Frame assembly checklist
Pipes can be connected in two ways: by welding or by bolts. Welding ensures monolithicity and no backlashes, but makes the structure indissoluble. For transportability in welded arcs, you can provide connective couplings in the middle. Bolt connection through drilled holes and inserted pipe segments allows you to quickly disassemble the frame, but requires careful sealing of holes or the use of internal bushes so that water does not accumulate inside.
An important step is to install the bottom supports. They should not have sharp edges that can pierce the balloon. The ends of the pillars are put on rubber plugs, hose clippings or special plastic "heels", attaching to the boat is carried out by slings thrown through cylinders, or screws screwed into the timbers (if the design of the boat allows this). Tent shelter It should not be rigidly fixed to the cylinders, so that when the air temperature and pressure inside the boat changes, there will be no bursting forces.
When welding polypropyene, do not overstretch the pipe in the soldering iron. The optimal heating time for the pipe 32 mm is about 8-10 seconds. Overheating leads to an internal flow that reduces the passage hole and weakens the joint.
Comparison of frame materials
To make a final decision, it is worth comparing the main specifications of popular materials, and the table below will help you weigh the pros and cons before starting work.
| Characterization | Polypropylene (PP-R) | duraluminium | Stainless steel |
|---|---|---|---|
| Structure weight | Low (lighter than water) | Medium. | Highly |
| Difficulty of installation | Low (sweater/fittings) | Tall (needs a tubular bend) | High (argon welding) |
| Resistance to corrosion | Absolute. | Tall (requires coloring) | Absolute. |
| Price of materials | Low. | Medium/High | High. |
| Repairability | High (replacement of the site) | Difficult (to be welded) | Difficult. |
As you can see from the table, polypropylene It's a great homemaker, it forgives mistakes, it's easy to repair in the field (you can just digest a piece), and it doesn't require complex equipment. Aluminum is good for those who know how to work with metal and want to get "perpetual" construction, but the cost and labor will be higher.
Steel is rarely used because of the heavy weight, which is an extra load for a light inflatable boat, reducing the payload. However, if the boat is large (over 4 meters) and you plan to install a heavy chassis with sides, the steel frame can be justified by its rigidity.
Operation and security measures
A finished frame is not a guarantee of safety, the main enemy of any tent on the water is the wind, even a light breeze can turn a strained fabric into a powerful sail. wind-proofness Never leave a boat with an awning mounted on the water unattended in a wind greater than 5-7 m / s. In such conditions, the structure is better to dismantle or lower the arcs.
⚠️ Attention: When the wind is increased, immediately remove the awning or fold the arcs. Attempting to keep an inflatable boat with a raised awning sail at anchor can lead to the loss of anchor or overturning of the vessel.
Check the mounting points on the cylinders regularly. Friction of PVC pipes when rolling on the wave can cause the fabric to be rubbed; use pads made of neoprene or dense rubber at contact points; also monitor the condition of the fabric itself: sagging should be eliminated with tension belts, as rainwater accumulates in the pockets of sagging fabric, creating a dangerous load.
Safety comes first: the awning should be easily dropped. In stormy weather, having a rigid PVC frame on a boat can be fatal, so consider a quick folding or dismantling mechanism.
Winter storage requires a special approach. Polypropylene becomes fragile in the cold, so you should not assemble or disassemble the structure at a temperature below -5 ° C. You need to fold the pipes carefully, without sharp inflections. The awning fabric before packaging must be completely dry, otherwise the mold will destroy the water-repellent impregnation in one season.
Frequently Asked Questions (FAQ)
Can I use a frame from an old foreign car or furniture?
Use finished bent pipes from furniture or cars is not recommended without serious modification. They may not fit geometry, have sharp edges or be too heavy. It is better to assemble the structure from scratch to the size of your boat using standard straight pipes and angles.
How to calculate the height of the pillars to pass in full growth?
For a comfortable stay in the boat, the height of the awning from the cockpit floor should be at least 180-190 cm. Keep in mind that under the load from the wind, the arcs can bend, so it is better to add a reserve of 10-15 cm.
What is better to attach the fabric to polypropylene arches?
The best option is to use plastic knives, Velcro straps or special clamps, you can also sew pockets to the tent, which are inserted arcs, the main thing is to avoid metal elements that can rust and stain the fabric or damage PVC when friction.
Do I need to paint polypropylene pipes?
Polypropylene itself does not require painting to protect against water, but if you are concerned about the fading of plastic from ultraviolet light (it may become more brittle in a few seasons), you can use special soils for plastic and acrylic paints, which will prolong the life, but add weight.