Pipes form the basis of any building envelope. Before choosing pipes for the fence, you need to understand what they are, find out the advantages of each type, their features.

Pipes for the construction of the fence differ from each other in the materials from which they are made, technical characteristics.

metal fence posts

Metal poles, based on the production methods, as well as depending on the materials, are of various types:

• round section;
• profiled;
• pumping and compression;
• screw.

round metal pipe

The round section of the pipe is the most advantageous. This section provides maximum rigidity with a minimum of material. With the same weight, a round pipe will be stronger than a profile pipe in bending. From a round pipe you get a durable and economical frame for the fence.

Profiled pipes

Profiled pipe - a design of round or rectangular section with a thin wall. Such a pipe will be a good alternative to concrete or brick pillars. Often, profile pipes are used mainly for the construction of structures that carry difficult mechanical and vibration loads.

It is best to use such pipes in combination with corrugated board as poles and crossbars. This design will be durable and economical. We also produce straight and bent profiles to create an artistic design.

Pipes galvanized

A galvanized pipe will be an even better solution for building a fence than a regular metal one.

It has the following advantages:

• anti-corrosion resistance;
• lack of welding work;
• does not require painting;
• ease of installation.

Screw posts for fence

The screw post is a normal post, the only difference is that the underside of the post is a screw. The screw pipe is firmly fixed in the ground due to the blades.

According to the principle of operation, screw piles can be compared with ordinary screws - they are screwed into the ground. When screwing in, the soil is compacted, this is the secret of the reliability of structures made of screw pipes.

Pros:

• Strength. The screw post can withstand heavy loads, while it has an impressive service life (up to 100 years).
• Economical and easy to install. No cement required for installation. Also, the screw pole does not need a foundation.

Intake tubing pipes

Pumping and compression pipes are in great demand. Many prefer pipes with a diameter of 60 mm and a wall thickness of 0.5 cm. For a heavy wooden fence, it is necessary to use thicker and stronger pipes of a larger diameter. The installation of tubing is similar to the installation of conventional round and profiled pipes.

Advantages of metal pipes

• such pipes are characterized by increased strength;
• with the right finish - they are relatively durable;
• can be additionally painted in any color.

• the metal is subject to corrosion and requires care in an aggressive environment (dampness, soil acidity, exposure to ultraviolet radiation).

In the production of metal structures, as well as profiles and pillars (shaped and round pipes of different diameters), plugs are used.

Fence from asbestos-cement pipes

Such pipes, combined with new manufacturing technologies, are superior in quality not only to wooden fences, but also to metal ones.

IMPORTANT! Asbestos-cement pipes coated with a special solution can stand for decades without requiring additional processing and painting.

Advantages of asbestos-cement pipes

• the main disadvantage is the increased fragility of such pipes. This disadvantage during the transportation and installation of pipes creates certain difficulties;
• asbestos-cement pipes are heavy and quite voluminous, which further complicates their installation;
• water ingress into the pipes is not allowed. In winter, water that expands when it freezes can cause the pipe to split;
• specific appearance. Wood, chain-link mesh, corrugated board are suitable for cladding.

plastic pipes

Plastic pipes are the most modern type of building enclosing materials. Plastic pipes do not require a foundation without fail.

If necessary, the corner posts can be additionally poured with concrete, and adjacent ones will be enough to cover with fine gravel. The presence of a foundation depends on the load and the pillars themselves.

Advantages of plastic pipes

• durability and reliability;
• environmental friendliness. Plastic pipes do not emit toxic substances and do not absorb them;
• resistance to negative environmental influences. Plastic is not subject to corrosion, the harmful effects of mold and insects;
• plastic pipes can withstand significant temperature fluctuations. They will last from -20 to +50 degrees Celsius.

The only drawback of such pipes can be called the taste preferences of the owner. Adherents of natural materials are unlikely to appreciate the practicality of plastic fences.

Polymer pipes can be made from various materials and their compositions:

• polyvinyl chloride (pvc);
• polypropylene (PP).

Fence made of polypropylene pipes

Polypropylene pipes are environmentally friendly, and therefore safe plastic. Modern polypropylene pipes are superior to steel in terms of technical characteristics. No harmful substances are released into the environment during processing and disposal of the material.

Manufacturers of polypropylene claim that it is sensitive to ultraviolet and under its influence is destroyed faster, while having a very high chemical resistance. The service life can be significantly extended by painting pipes.

Do-it-yourself pipe fence

No matter how high-quality the materials are, the strength and durability of the entire structure depends on its proper installation.

1. The depth of digging the pillars into the ground depends on the soil and the strength of the wind in a particular area. A meter depth is usually sufficient. The columns should be installed along a stretched cord, this will ensure a smooth and straight structure in the future.
2. After the pillars are dug in, they must be concreted with cement mortar. Concreting is an important stage in the installation of the fence; the strength of the entire structure depends on the quality of the cement composition and the correctness of the work done.
3. Pillar hammering is another popular installation method using a sledgehammer. This method is suitable for not too soft soil with a small amount of stones.

$ Price of pipes for the fence

A pipe for a fence made of corrugated board - 47 rubles m / p.

Asbestos-cement pipe - 78 rubles m / p.

Pipes in enclosing structures are the main elements that withstand the total bearing load and provide verticality to the fence.

Despite the popularity of modern fencing, asbestos-cement pipe fences still hold a strong position in the market. And in combination with new manufacturing technologies, its quality in many respects surpasses not only wooden fences, but even the same metal ones.

Advantages and disadvantages of asbestos-cement pipes for fence

Wood is subject to rotting and rottenness, metal rusts. And an asbestos-cement pipe coated with a special glaze can stand for decades, and, at the same time, without requiring processing and painting! It is these two qualities - low price and resistance to dampness and pests - that made it so popular among the poor. However, families with sufficiently large incomes prefer to take metal holders. In their support, it must be said about the high fragility of asbestos-cement pipes, which creates certain difficulties during transportation and installation. Also, the asbestos-cement pipe is heavy and bulky, which further complicates its installation.

To this it must be added that water should not be allowed to get inside, which in winter, expanding when freezing, can split the pipe. And, of course, an important indicator of any fence is its aesthetics, which cannot be said about the fence with asbestos-cement holders. But still, if you decide to install asbestos-cement poles, then wood, chain-link mesh and corrugated board will be the most suitable cladding.

The process of building a fence begins with the installation of asbestos-cement poles-holders. The distance between them is determined depending on what material will be used for facing the fence. To install the pillars in the ground, holes are drilled, the diameter of which must be at least twice the diameter of the pipe. The bottom of the pit must be filled with cement mortar or the bottom should be laid with waterproofing material (for example, roofing material). This is done in order to prevent contact between the soil and the sand and gravel cushion. The latter must be poured before installing the pillar. The depth of the pit, as a rule, is proportional to the ground part of the column, but of course it is determined in accordance with the density of the soil, the length of the spans, the diameter of the pipes, the windage of the lining and the wind situation in the region.

For pillars, it is desirable to choose pipes with a thickening at one end, which is buried in the ground. If it was not possible to find such pillars, then the end that will be buried must be strengthened by inserting thick rods, sheet metal, pieces of a metal pipe, etc. be well compacted beforehand. Then iron bars are hammered into the bottom of the pit, which will increase the strength of the poured concrete. It is also desirable to fill the cavity of the underground part of the column with concrete to give greater strength. Thus, holders are installed around the entire perimeter of the future fence.

After a few days, you can start fixing the load-bearing beams, followed by cladding. Holes are drilled in the poles for fastening the bearing part. If a metal profile is used as beams, then the cladding can be fastened with wire or clamps. If the beam is wooden, then screws can also be used.

Asbestos-cement pipes are successfully used as fence posts (GOST 1839-80). Asbestos-cement pipes - in some cases, they become a worthy alternative to metal pipes and concrete poles, also used in the construction of fences as poles. At the same time, asbestos-cement pipes, which are distinguished by an affordable price, have their own distinctive advantages and disadvantages.

• Asbestos-cement pipes are not subject to rotting and corrosion, while metal pipes installed as a pole corrode quickly. This lack of metal pipes is especially evident in regions with high humidity;
• Due to the susceptibility to corrosion, wooden and metal pipes (pillars) for the fence need constant care, coating the surface of the pipes with special anti-corrosion compounds, waterproof paints, etc .;
• Asbestos-cement pipes are not only not afraid of moisture, such pipes only become stronger from moisture over time, due to the hardening and hardening of cement, which in the asbestos-cement pipe is almost 85%;
• Asbestos-cement pipes used as fence posts will cost several times cheaper than metal ones;

There are no ideal materials without flaws in nature. Like metal pipes and concrete pipes, asbestos-cement pipes used as fence posts have their drawbacks:

• Asbestos-cement pipes are quite laborious to install;
• Asbestos-cement pipes are brittle and break when dropped or hit hard;
• Asbestos-cement pipes, even as fence posts, can hardly be called aesthetically attractive.

Mounting

Asbestos-cement pipes used as poles have the following technical parameters and characteristics:

• The outer diameter of the pipe is 118 mm;
• The inner diameter of the pipe is 100 mm;
• Pipe wall thickness - 9 mm;
• Pipe length - 3950 mm.

The parameters of asbestos-cement pipes intended for this purpose are strictly fixed. To cut the pipe to length, it is best for you to use a grinder with a diamond wheel. The standard weight of a package of 42 asbestos-cement pipes ready for transportation is 1012 kg. Package volume - 1.83 cubic meters.

Pillars made of asbestos-cement pipes, as a rule, are used in fence structures of wooden and tension fences made of chain-link mesh. Wooden flooring is attached to pipes with self-tapping screws or clamps, to a chain-link mesh - with wire. The pipes are fixed on sand and gravel pads, after which the pits and the hollow body of the pipe are filled with concrete.

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The use of asbestos-cement pipes for installing a fence

If you need a fence of maximum strength and with a long service life, it is installed from reinforced concrete structures, brick or stone. But if there is no need for special stability and durability of the fence, you can install a fence made of asbestos-cement pipes, between which fence sections made of wood, profiled sheet are fixed, or a metal mesh can be hung.

Asbestos pipes provide long-term operation with proper installation.

Unlike wooden and metal poles, they are practically not subject to rotting and corrosion. This type of poles has found application for stretching the chain-link mesh and connects wooden spans. Proper installation and connection with a coupling, the calculated depth of the holes and high-quality concrete pouring will ensure long-term operation of the fence.

Asbestos pipes are connected to each other using polyethylene and asbestos-cement couplings. On the inside, the couplings have a rubber ring. When the coupling is connected to the pipe, a mounting gap is left, which allows the pipe to deviate to an acceptable angle. Couplings are reliable clamps of pipe connections. Couplings can be used to fasten the remaining after the installation of the fence. By connecting the trimmings with a coupler, they can be used as poles.

The disadvantages of fences from asbestos-cement pipes include:

1. Fragility. When dropped or hit, they break easily.
2. Freeze prone. In asbestos-cement pillars not filled with concrete, water that has entered the pipe cavity freezes in winter. As a result, the pipe bursts according to the level of filling with water.
3. Unaesthetic look.

Installation of asbestos-cement fence posts

To install the fence, standard asbestos-cement pipes with a thickness of 9 mm, a length of 3950 mm and a diameter of 118 mm are suitable. Before installation, the pillars are cut with a grinder along the height of the fence. Asbestos pipes can also be cut with an ordinary hacksaw.

An ordinary fishing drill (auger) is suitable for drilling holes. They can drill about 40 holes per day. The depth of the wells depends on the installation conditions of the fence: the type of soil, wind load and the length of the spans. On average, it is 800 mm. This will be enough for the stability of the column.

The part of the asbestos pipe located in the ground is practically not subject to corrosion and decay.

Then we insert the pillars and fix them in a vertical position. Sometimes, before installing asbestos-cement pipes, metal rods are hammered into the ground. By pouring a solution inside the column, you can get a reinforced structure. Having installed the corner risers, we stretch the cord between them along the upper ends. We install intermediate posts along the cord.

If the hole is not filled with concrete, it is preliminarily waterproofed. This prevents the sand from bonding to the clay. Heaving soil tends to push the pillars out of the hole when it freezes. When the hole is filled with concrete, the buoyancy effect of the soil increases. Therefore, the concrete layer should not exceed 30 cm, and the rest of the volume is covered with sand.

During installation on a gravel-sand cushion, the soil at the base of the pipe is periodically watered and compacted. To establish a better connection to the ground, it is more practical to use posts with an extension at the bottom.

For greater stability of fences under heavy spans of the fence, you can pour a concrete base under the pillars and a strip foundation for sections. A single foundation will ensure durability and reliable connection of the fence.

To fasten the horizontal crossbars, we drill holes for the threaded studs with a drill. As the crossbars, you can use either a wooden beam. The wooden beam must be coated with an antiseptic composition. When using a metal profile, cover it with a primer for metal.

Having installed the fence posts in this way, we attach flat slate, corrugated board, wooden boards or chain-link mesh to them. Wooden spans are fastened with clamps using self-tapping screws. The chain-link mesh is fixed with a wire.

Fixing poles without pouring concrete

During the usual installation of asbestos-cement pillars, concrete is poured into the free space between the edges of the hole and the pipe. And it is considered sustainable. But the poured concrete rests on the same unstable ground and nothing holds it. In this regard, the standard method is applicable only on light, non-rocky soils.

Heaving soil will just as well push out a column with poured concrete. The heaving force destroys even the foundations of large houses. Burying the pipe below the level of soil freezing solves the problem, but at the same time a large amount of concrete is consumed and the pipe is buried almost half of its length.

There is a universal way to install asbestos-cement risers on any soil without concrete. A hole is drilled with a diameter greater than the diameter of the pipe. After the installation of the asbestos pillar, the space surrounding it is covered with fine gravel and rammed. This creates an effective removal of moisture around the post and turns the heaving soil into a stable one.

When concrete is used, it prevents groundwater and when it freezes in winter, it is pushed to the surface. With the described method, the water freely goes to a depth below the freezing layer, where natural drainage occurs. There is no pressure on the asbestos-cement pillar.

If the fence is installed on sandy, non-porous soil, holes are drilled immediately to the diameter of the pipe. Buying a special drill is cheaper than the cement spent when installing the fence in the traditional way. But this work requires certain skills when drilling holes with strict verticality and strictly along the fence line.

Hello! I have a picket fence, asbestos poles.

Tell me if it is possible to cut asbestos poles to ground level. Insert iron pipes into them and fill the void between the pipes with cement. Will they keep a corrugated fence?

Alexey, Lipetsk.

Hello, Alexey from Lipetsk!

They do that sometimes. But if the asbestos-cement pipe is buried to a shallow depth and the soil is heaving, then pillars can be pushed out of the soil as a result of seasonal freezing of groundwater and turning them into ice.

The physical meaning of what is happening is approximately as follows. When the asbestos-cement pillar is simply dug into the ground, the said ejections are small and almost not always noticeable. Since its surfaces (external and internal) in contact with the soil are smooth, and when the soil is deformed, they "slide" along the border of contact with it. And the area of ​​\u200b\u200bthe support itself from the lower end of the pipe is insignificant (a centimeter of thickness multiplied by the circumference - with a normal diameter of 10 centimeters) and also does not have a particular effect on this process.

When filling the voids between the asbestos-cement pipe and the inserted metal pipe, the support area increases significantly and becomes equal to the area of ​​the circle minus the area of ​​the inner circle of the metal pipe. Which already amounts, depending on the diameter of the metal pipe, to a much larger value.

And as a result, the buoyancy force of the freezing soil becomes very significant. Since the support pipes are often dug not to the depth of freezing of the soil, but to a much smaller one.

That is, it is possible that after your modernization, the support pillars will begin to crawl up.

At least there are such cases.

In our construction practice, in similar cases, we usually act somewhat differently. Namely - we take and cut off asbestos-cement pillars flush with the surface of the earth. Fill in the recesses. Then we take metal pipes (with a diameter of about 40 - 60 millimeters) and hammer them with a sledgehammer to a depth of about 0.6 meters.

With an offset from the installation sites of the former asbestos-cement pillars by several centimeters to the side.

The pipes are primed in a couple of layers in their visible part, and in the underground part they are covered with bituminous varnish.

And then everything is according to the usual scenario - a fence is mounted.

As a result, it turns out that the fence stands rooted to the spot, without pushing its pillars out of the ground, whatever it may be, for many years.

Concrete is not used. Thick-walled pipes are desirable, the upper ends are muffled with welded plates or pieces of a corner in the form of a "roof".

You can do the same, you won't regret it.

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