How to bend a profile pipe with your own hands at home. How to bend a profile pipe at home with and without a pipe bender for a greenhouse and a visor What to remember

When building small architectural forms, making canopies, awnings, or installing heating (water supply) systems, home craftsmen are faced with the need to bend a professional pipe.

In the mass production of metal structures, especially in specialized workshops, industrial pipe benders are used.

Such devices allow you to quickly and without defects bend a professional pipe with a size of 20 to 40 mm. However, the purchase of pipe bending equipment for one-time use is unprofitable, in some cases it is cheaper to go to a workshop and pay for the work on forming a profile. If this option does not suit you, consider ways how to bend shaped tube at home.

Features of forming pipes with a square (rectangular) section

Unlike a round pipe, in which the tension of the material occurs relatively evenly, the profile has 90 ° angles. The inner part of the profile cannot bend without deformation of the side walls. As a result, folds are formed on the inner radius, and tears on the outside are possible.

Without going into the technology of how to bend a pipe without a pipe bender, many homemade craftsmen spoil the workpieces, or violate the strength structure of the material.

The basic rule is to avoid critical bends, or force (programmed) deform the material.

In industrial pipe benders, for even distribution of the load, a stamp is formed on the inner side of the radius. For this, on rollers, or on a mandrel (depending on the design of the pipe bender), a special bump-side is provided.

All "extra" metal is folded inward without forming folds. As a result, the load is evenly distributed, and it is possible to bend a square pipe at a fairly small radius.

Correctly bend profiled pipes at no additional cost

There are many ways to bend a profile pipe at home without using an industrial pipe bender.

Sector welding

This method is available subject to availability welding machine... You will also need a grinder, but you can get by with a hacksaw for metal. The essence of the method is to make evenly distributed sector cuts along the inner side.

The amount of material is reduced, and you can not worry about the formation of folds and breaks in the metal. After cutting out the sectors, the profile easily takes the given shape, and the resulting cuts are welded with any in an accessible way.

The method is laborious, but you can bend the pipe to any radius, including with a variable value. If you are an experienced welder, the tightness and strength characteristics of the workpiece will not deteriorate.

The only drawback is that the finished product does not look very aesthetically pleasing. The technique is not suitable for a decorative visor over the porch, but you can bend a profile pipe for a greenhouse built with your own hands. Again, a welding machine is required.

Hot forming as a way to bend a pipe without a pipe bender

In this case, a gas torch or blowtorch is required. When heated, the metal becomes soft and pliable in tension or compression. The likelihood of wrinkling and tearing is practically zero.

How the method works:
The technology is based on local heating of the bend using a torch.

Bending the pipe is often required when installing communications. If the work is done by professionals, everything goes relatively quickly and easily, because companies of this profile have not only the necessary knowledge and experience, but also the appropriate tools. But what if you need to bend the pipe at 90 degrees at home, but there is no pipe bender at hand? Consider all the options for performing such work.

Manual bending of structures 90 degrees

It is possible to bend a pipe at 90 degrees without a pipe bender only in a few steps. Otherwise, the structure is simply deformed. Usually 5-6 receptions are enough.

How is the work done? The pipe is gripped by the hands, gradually bending under the thumb rest. Then we move our fingers one cm and perform similar actions. And so five or six more times. Working without a pipe bender, manually, is not as easy as it seems at first glance. Therefore, it is recommended to pre-bend the unnecessary pipe sections.

This method is suitable for structures with dimensions 16, 18 and 20 mm. However, work can be carried out on products of large diameters. It should be borne in mind that in this case it will be more laborious.

Bending structures 90 degrees by heating

Aluminum or steel structures can be bent with a gas torch. For this, the structure is fastened in a vice, then warmed up in the place where the bend is planned. The burner can be removed when the leaf, brought to the heated zone, starts to smoke. If the structure is steel, the color at the heating point should be red.

Bending the pipe with a plane-parallel plate

To carry out such work, the structure is fixed in a clamp. Bending is then performed along the plate. This is a simple method that does not require significant investment. The only drawback is the unchanging curvature of the plate. However, you can use workpieces with different curvatures to work. The method allows you to bend steel structure... However, the length of the pipe must be sufficient.

Bending the pipe with a metal spring

This method allows non-ferrous pipes to bend 90 degrees. At the same time, they must be characterized by sufficient plasticity. Why do you need a metal spring? It prevents deformation of the structure. The size of the spring must match the internal dimensions of the pipe. It is inserted into the structure, then bending is performed.

Bending the pipe when applying sand

This method allows the aluminum pipe to be bent 90 degrees. The method is very simple. It is required to fill up the sand inside the structure. Then plugs are put on the ends of it. The required space heats up. Heating can be done using any tool: soldering iron, gas torch, and so on. Bending can be performed after sufficient warming up. Why is sand needed? It, like a metal spring, prevents deformation of the structure. After the work is over, the plugs must be removed from the pipe, and then the sand must be removed from the cavity. Keep in mind that if you need to perform bending on galvanized structures, remember that they cannot be heated, as this will deform the product.

If you are interested in how to bend a pipe at 90 degrees without a pipe bender, we recommend that you familiarize yourself with information materials: photos, videos. So you can find out more information, see how professionals do this work, take note of various tricks and nuances.

The greenhouse frame with square or rectangular cross-section attracts with reliability and durability. A very strong metal structure allows maximum light to pass through, because its posts, supports, ties are much thinner than those of wooden rivals. The metal is inferior in manufacturability. Without knowing the nuances, it is difficult to make an arched arc or frame for a door from a straight blank. Because of these complications with a metal base, they completely in vain prefer to buy "green houses". However, if you really understand how to bend a profile pipe for a greenhouse, you can build an inexpensive arched structure with your own hands at low cost.

The essence and problems of bending profile pipe

Bending of metal products, regardless of the cross-sectional shape, consists in giving them a partial or full smoothly curved configuration. One of the common locksmithing procedures is performed either under pressure alone or under pressure in combination with heating the bent section. At this time, compressive forces from the inner side of the workpiece and tensile forces along the outer wall act simultaneously on the machined part of the hollow metal workpiece. Complications are that:

• the material in the process of changing the shape can lose the alignment of the segments, i.e. parts of the bent workpiece will not be located in a single plane;
• stretchable outer wall in the flexion area, it may not withstand the impact and burst corny;
• the compressible inner wall may, instead of evenly contracting, fold into corrugation-like folds.

Without knowing the intricacies of profile bending, there is a risk of simply crushing the product, ruining the workpiece. But recklessness is not our way! Moreover, if it is accompanied by material losses. For the glory of rational economy, we will take into account all the vagaries of the profile and characteristics of the "iron" material. Let's not forget about the dimensions of the section, the wall thickness of the profile pipe, the required bending radius and the elasticity of the steel alloy. Based on the specified parameters, we will choose the correct technological path - it is also a bending method.

Why do you need to know profile characteristics?

Profile pipe rolling differs from the standard round version in the shape of the section, which can be square, oval, rectangular or flat-oval. According to the GOST R regulations under the number 54157-2010, the round product is also included in the list of profile products. However, in greenhouse construction, products with a square and rectangular cross-section are most often used, for example, 40x20 mm profile pipes, because it is easier to attach a coating to their even flat walls.

For various national economic needs, products are manufactured in a wide range of sizes. It differs in configuration and cross-sectional area and, naturally, in wall thickness. The set of sizes determines the plastic possibilities. In professional language, they are called the minimum permissible radius of curvature. So, before you know how to make a workpiece for the frame, you need to find out what the smallest radius of flat round deformation the workpiece can "survive" without damage.

To determine the minimum allowable bend radius of a square or rectangular profile, we need the height h, because:

• products with a profile height of up to 20 mm will be bent without passing into the category of unsuitable marriage, if the bending is performed on a section with a length of 2.5 × h or more;
• rolled pipes with a profile height of over 20 mm will withstand deformation without loss in a section with a length of 3.5 × h and more.

The indicated limits are necessary for those who conceived to make racks, shelves and frames for vents or doors. The wall thickness also makes adjustments to the area of \u200b\u200blimitations. Wide pipes with thin walls up to 2mm thick are generally not recommended to bend. Better to use welding.

Home craftsmen, who decide to make arcs for, need to take into account that products used in everyday life made of ordinary carbon or low-alloy steel alloys tend to "spring" slightly after applying forces to them. They seem to be trying to return to their previous state. Therefore, after a novice locksmith with his own hands completes the bending of all arcs, he will have to repeat the processing and re-fit the arches according to the template. It is desirable to initially take into account the value of the plastic moment of resistance Wp. It is usually indicated in the documents of the building material sold. The smaller the moment, the less fuss with the fit.

Bending methods and their features

Profile pipe-rolling is bent both cold and hot. Heating with a gas burner will noticeably increase plasticity. However, a material of small cross-section bends excellently without unnecessary temperature exposure, because thin pipes are quite plastic and more easily amenable to the force applied to them.

There are no exact guidelines for using heat for bending. The standards indicate only the dimensions of the round bars, according to which the flame must be exposed to the treated area at Ø 100 mm or more. With square and rectangular shapes, everything happens a little differently. Based on the experience of craftsmen:

• at a profile height of up to 10 mm, the workpieces are uniquely cold-bent;
• with a profile height of 40 mm or more, pipes are bent with heating.

How simpler and easier it is to bend a profile with a height in the range from 10 to 40 mm at home, the performer will have to decide for himself. If in the arsenal of the master there is a profile bending machine, with its help you can create an arched rounding without heating. There is no apparatus, it is better to test your strength in advance. To do this, you need to clamp one end of the material in a vice. On the other end, put on a pipe larger than the height of the profile, and pull on the "shoulder" enlarged in this way. If it works, there is no point in heating metal products.

Option # 1 - bending with heating

We will deform the non-yielding material using the hot method, after filling it with sand. So the quality of processing will increase, and the uniformity of the fold will be ensured. We will stock up on tarpaulin mittens for work "hot" and start:

• from scraps of timber or logs, we will make two pyramidal plugs, the length of which should be 10 times the width of the base. The base area of \u200b\u200beach homemade plug should be almost 2 times larger than the square or rectangular hole that it has to plug;
• let's try how the plugs "sit", then on one of them we select longitudinal grooves on four sides. They are needed to release the gas that will accumulate when the filler is heated;
• pre-anneal the workpiece in the area of \u200b\u200bthe future fold;
• let's prepare the filler. As it we will take clean building sand of medium grain size. In the absence of bulk building material, we will use the sand from the children's sandbox. First we sift it through a sieve with meshes of 2 or 2.5 mm to remove gravel and gobies from the packing. Large inclusions on the pipe surface can form unnecessary relief. Then we “pass” the sifted mass again, but this time through a fine sieve with 0.7mm meshes, so that the dusty particles do not sinter when heated. All the screenings, as well as the filler at the end of the actions, will be returned to the sandbox;
• calcine the filler at a temperature of 150 ° C;
• we will hammer in one end with a wooden stopper, on which there are no channels for venting gases. Install a funnel at the other end. Depending on the size, we will install the workpiece at an angle or perpendicular to the ground. We will pour the filler through the funnel in portions. Periodically tap on the walls of the product from bottom to top with a wooden or rubber mallet so that the sand is compacted. A dull sound will be a signal of sufficient compaction;
• close the filled blank with a second plug;
• mark the heating section on the workpiece with chalk;
• fix the workpiece either in a vice with a template or in a clamp. Place the material with the welded seam so that the welded joint is on the side. It is undesirable to stretch or squeeze along the seam;
• heat the marked area red hot, and carefully give the workpiece the required shape. We bend in one step with a forward, unsharp movement in a strictly horizontal or vertical plane;
• after cooling down, compare the result with the template. If everything is in order, knock out or burn out the corks and pour out the sand.

The described method is good for forming single corner bends, because heating the pipes several times is not strongly recommended. Metal loses its strength from repeated thermal shock. However, when creating a rounded arch, repeated heating is inevitable. After all, it is unrealistic to do the work in one go, and chilled to a light cherry hue, i.e. up to 800 ° C, the workpiece can simply burst.

Option # 2 - cold method

Cold plastic deformation of profiled rolled products is carried out with or without filler. Material with a profile height of up to 10 mm does not require filling. A thicker pipe is best filled with sand or rosin. An alternative to the sand filler will be a tightly wound spring, the dimensions of which will allow it to be tightly installed in the cavity at the processing site. The spring washer will prevent a sharp change in the profile section at the bend points.

You can bend "cold" at home:

• manually using the simplest devices such as bending plates, vice and mandrel;
• with the use of a mobile profile bender - an improved analogue of a manual pipe bender. The bending machine is different from the bending device round pipes only by the shape of the recess of the working roller;
• by rolling on a homemade or factory roll forming machine, which can be made by hand or purchased off-the-shelf.

It is more reasonable and profitable to rent technical means of mechanization of bending if they are needed for a one-time construction of a greenhouse. If, in the future, the construction of green houses for relatives and neighbors or the construction of a beautiful metal fence, for example, there is a reason to acquire your own bending machine.

Bending devices and machines

In the family of devices and units for bending there are representatives of varying degrees of technical complexity. To begin with, consider the means for those who are puzzled by the question of how and by what means it is possible to bend a profile pipe without the use of special equipment. Then we move on to homemade rolling plants.

Variants of the simplest devices

The use of elementary "helpers" for cold deformation is regulated by the size of the material:

• thin rolled pipes with a profile height of up to 10 mm are bent using a horizontal plate with holes. Metal pins are rigidly installed in the holes, playing the role of stops. Bend the product by placing it between the stops installed in the holes according to the bending radius. They start from the middle of the workpiece and gradually move towards the edges. The disadvantages of the method are the application of considerable muscular efforts and rather low deformation accuracy;
• pipes with a profile height of up to 25mm are bent using roller devices operating on the principle of the Volnov machine. The metal workpiece is firmly fixed in a vice, and a physical force is applied to the workpiece through a roller. The bending is performed more efficiently and more uniformly than in the previous case. But from the performer, by analogy, remarkable efforts will be required.

To form a bend with a large radius of curvature, such as arcs for an arched frame, stationary rounded templates with clamps are used to fix the workpiece. These devices belong to the category of plane-parallel plates. The workpiece is forcefully "laid" into a groove, the dimensions of which are equal to the dimensions of the pipe. Manually bent by means of a mandrel, the pipe takes the shape of a given contour.

Upgraded bending plate

If a home locksmith is not deprived of physical strength, he will come in handy for his own needs simplest tool for a rather laborious deformation of the profile pipe. It can be made in the form of a panel attached with clamps to the work table or workbench. In the case shown in the photo, the bending plate is welded to a metal pedestal, but it is screwed with four bolts to concrete floor workshop. To remove the device at the end of the work, it will be enough to unscrew the bolts. After dismantling, no fastening pins remain or rise above the floor surface, which means that nothing will interfere with movement and create traumatic threats.

The principle of manufacturing the working plane is extremely simple:

• The bending plate is a panel cut from thick sheet iron.
• The panel is welded to a profile tube, installed in a telescopic manner in a pedestal post.
• In the working plane, two holes were drilled for the bolts, which are stops.
• The bending radius is adjusted by installing a suitable size nozzle on one of the bolts.
• In order to maintain the alignment of the segments adjacent to the bend, a metal plate is installed above the workpiece, fixed with bolts.

The pedestal is multifunctional. Its owner has the opportunity to use it as a miniature workbench for performing an impressive number of plumbing operations.

Mandrel for bending the profile pipe

The method is suitable for products with a wall height of up to 25mm. The craftsman will need a large workbench and a significant volume free space around working area... One edge of the workbench is punched with frequently spaced holes for fixing the mandrel and for choosing the optimal position of the piece holding the pipe. The template for the forthcoming plastic deformation is cut from thick plywood. True, the plywood mandrel is only suitable for one-time bending procedures. If there is a lot of bending work to be done, the mandrels are better welded from a steel corner.

Using the manual profiler

Significant amounts of work on deformation require mechanization. Mass production of bent parts will take too much health away from the performer. To facilitate bending, it is advisable to make a machine according to the drawing. They are mainly used for working with large workpieces. The main working bodies of the hand-held unit are three rolls, two of which are fixed motionless. Changing the position of the third movable roll determines the bending angle.

If the above methods are not acceptable, then the future owner of the greenhouse has two options - renting a manual installation or ordering the manufacture of rounded parts. The process of deformation of the workpiece was demonstrated by the video: how it is easier to bend a profile pipe - by repeated rolling or by physical impact, it is up to the performer to decide.

When working manually, it is important to follow the rules for bending shaped pipes and not make sudden movements. It is necessary to monitor the uniformity of deformation on the outside and inside of the rolled product. However, you should not be too upset about small folds on inner surface folds: they can be corrected with hammer blows. Before starting work, you need to make templates from wire, chipboard or gypsum board for verification and obtaining a result that matches the project.

Home repair, in particular the repair of a private house, often requires the use of pipes, and not always perfectly flat. In such a situation, the question arises: how to bend a pipe without a pipe bender at home? If you know all the tricks of this process, then it's quite easy to do.

Methods for bending a metal pipe at an angle of 90 °

Metal is a fairly strong material, but with special impact it is quite easy to bend. There are several methods of flexion today. metal pipe do it yourself.

Modification of a profile pipe

This type of metal structure is often used for the construction of greenhouses. different sizes and purposes, as well as gazebos and other structures on the site. The main feature of the building material of such a pipeline is that when bent it is very easy to damage it, for example, it can easily flatten or crack. The way out of this situation is quite simple. Its cavity must be filled with dry fine sand or water (in the future, the water must be frozen). It is these actions that will eliminate the possibility of damage to the pipe and achieve the desired result. The same technique is suitable for both duralumin and brass piping.

How to bend a square shaped tube?

If you have a square tube with a small cross section in your hands, then it can be easily bent without heating. However, filling the cavity with sand or water is still desirable. Unlike the usual round blanks, you need a rubber mallet.

The pipeline itself must be placed on two reliable supports. After that, using the mallet directly, bend the product, and all actions must be performed very smoothly and carefully to avoid possible damage. If you need to achieve a sufficiently large angle of curvature, the material can be heated at the expected bend to facilitate the process.

Bending rules for metal-plastic

It is the metal-plastic pipe that is most often used to equip the underfloor heating system. To ensure the efficiency of the system, it is necessary to ensure the parallel operation of the pipeline with the heating system.

Features of laying a warm floor imply the presence of a large number of folds. However, they are not available on free sale. You have to do the bends yourself, and for this you need to know all the secrets of the material and the procedure.

Just as in the case of a metal workpiece, there are several ways to get the required twist:

• the easiest and cheapest method to bend the pipe on your own, without the use of available tools. To do this, the building structure should be clamped firmly in the fists and bend it smoothly. Try to eliminate the possibility of a strong bend. There is a norm for this, which assumes the presence of 15 ° curvature for every 1-2 cm of the metal-plastic workpiece;
• for another method, you need to take care of the presence of pieces of wire with which to fill the cavities. This will allow you to achieve a smooth and even bend in the shortest possible time;
• as for a metal pipeline, dry fine sand can be used as a filler, which must be poured into the cavity and the pipe openings closed with plugs. One end of the building structure must be fixed, and it is desirable to do this rather reliably and firmly, and then, using a blowtorch or gas burner, heat the place of further bending. Checking the readiness of the material to change its shape is checked with a piece of paper.

Features of bending polypropylene pipes

There are situations when you just need to bend exactly polypropylene pipe... However, the opinions of manufacturers agree on one thing: it is undesirable to do this. But if you can't do without it, use one of two possible methods.

Basic methods for bending polypropylene material:

• the first method implies all the same heating of the bend point. It is necessary to use a building hair dryer for these purposes. Optimum final temperature 150 ° C. It is further recommended to protect your hands with gloves resistant to high temperatures, bend the product to the required shape. The main thing is not to forget about the basic rule: the thickened wall of the polypropylene structure must be placed on the outside of the bend. Now wait until the material has completely cooled and inspect it carefully. There should be no dents or cracks on the surface;
• the second method is cold. Everyone can bend such a pipe with their hands, however, the bending radius should not exceed 8 diameters of the pipe used, otherwise you may simply break it.

How to effectively fold a plastic pipe?

Instructions to help you bend easily enough PVC pipe, includes several points, by completing which, you will give the desired shape to the plastic pipe without assistance at home and at home. So, to work with PVC pipe, you need to follow these steps:

1. Purchase a fiberboard, from which in the future you will need to build a special frame. You need this frame in order to give the plastic structure a certain shape.
2. Once the slab has been shaped to the desired shape, it must be sanded properly. It is better to use fine sandpaper for this.
3. The next step involves shaping the silicone into a suitable shape and size for your plastic blank. This shell serves as a mount PVC construction in a frame prepared in advance. In addition, it is capable of performing a protective function against scratches, chips and other mechanical damage to which the surface of a plastic pipe is exposed.
4. Now you should place the item itself in the prepared protective shell.
5. The next step involves heating the bend. Plastics exposed to high temperature, begins to soften and settle on the installed frame. This will ultimately lead to the desired shape of the plastic blank.
6. After shaping, it must be allowed time to cool. For this, ten to fifteen minutes is enough. Only after that you can safely remove your modified PVC pipe from the frame, after which the structure must be left again to completely cool it.

It is quite difficult to achieve an ideal pipe bend, regardless of its material, at home. However, if you carefully study the theory and conduct more than one experiment on unnecessary sections of such a pipe, you will clearly understand in practice how to bend a pipe without a pipe bender and you will be able to do this at any time convenient for you. Be sure to use our advice to get the job done as correctly as possible and without big losses.

Popular construction material drywall is used to create perfectly flat surfaces. But now, from high-quality drywall, they began to make curved design structures - arches, multi-level ceilings, niches. You can create such decor components yourself, but first, let's figure out how to bend the drywall profile so that the desired shape comes out. In addition, you need to learn how to make durable metal carcass to secure the curved part.

For what purposes do you need to bend a plasterboard profile?

Drywall (gypsum plasterboard) is used to create various curly elements. Modern installation of suspended ceilings is not complete without the use of this material. When creating a ceiling design, the following elements are used:

• Circles of various diameters
• Regular squares or rectangles
• Waves, steps, sun and many other elements

In addition, it will be necessary to bend the profile in the following cases:

• If a high arch is formed, the profile can be bent into an arc
• When the ceiling is formed as a single composition with the transition of individual curly components to the walls
• When installing a niche with a curved element
• When creating an arched partition with a complex bend

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Any of the above cases assumes that it is necessary to bend the plasterboard profile so that the structure is installed based on the specified scheme. If you follow all the steps correctly, the profile will be easy to install.

It is necessary to bend the metal parts of the frame intended for drywall strictly according to the scheme. Therefore, in order to correctly bend a large area of \u200b\u200bthe profile, we study the attached instructions.

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Required tools and materials

Working with durable sheets requires the correct set of accessories. To correctly bend metal parts, make the desired cut on one of them, and also make them quality installation, we use the following accessories:

• Screwdriver
• Metal screwdriver
• Pencil, tape measure and precise building level
• Special scissors for working with metal

In addition, the following items may be needed:

• Strong metal profiles on which we will fix the gypsum board
• Various fasteners such as self-tapping screws

When bending sheets, you need to take care of your own safety, hands should be covered with protective gloves to avoid various scratches and abrasions. Special protective glasses can also be useful for you at work. The procedure for creating structures from profiles of the required shape will take you 20 minutes if you follow the recommendations.

Bending and securing the profile

How to bend a drywall profile correctly? You can bend the guide profile, since the rack is designed to support the main weight of the future structure. When creating an opening for an arch, you need to use a special arched profile.

It is necessary to bend all the profiles before starting their direct installation. Right angle cuts will help shape the profile. There are 2 methods of execution, depending on which part metal profile will be used to install a solid frame:

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The smaller the radius of the upcoming bend, the more often the cuts need to be made. Often the ceiling is formed by figures, sometimes the wall can also be decorated with various figures. In this case, the bend must be done at the end of the formation of the first level frame. The profile bending scheme is as follows:

1. We make the markup for the first wireframe level. This is necessary, since without this action it is impossible to perform complex curly elements;
2. We cut the required profile to the required length. To shorten, you need to use special metal scissors;
3. We make cuts at right angles, one must go parallel to the other, otherwise it will not be possible to bend the element. The step for their implementation may vary, but it is in the range of 50-80 mm;
4. We make cuts along the entire length or strictly in the place where you need to make the next bend;
5. Trying on the cut material to the finished marking lines;
6. We install the finished fastener, bending it as it is fixed;
7. We fix all the components, giving them a given shape.

Before bending begins, the structure is fixed with self-tapping screws. This is an easy way to secure the future frame so that you get the right decor element.

You may need help installing a multi-curved structure as it can be difficult to install a bulky part yourself. You need to carefully look during work, so that everything is done according to the scheme, the desired bend shape is obtained.

When fixing a frame containing curved shapes, each detail must be checked with a building level, because it is very important that all components are located in a single plane.