Using our online calculator you can calculate the required amount of fence made of metal profiles and corrugated sheets. The program will additionally calculate auxiliary materials, metal mesh, board, and the required number of support posts.
If you want to calculate the cost of building materials for a future fence, indicate all the parameters in the appropriate cells of the table.
When you select the item “Correction of the distance between columns”, you receive a drawing with evenly distributed support columns for each side of the site, with their distance adjusted.
Important! The program includes gate posts in the calculation.
The exact calculation of the cost of the fence will depend on the correctness of the data you entered.
DIY fence
First of all, you will need to prepare the area for future fencing. We remove the garbage, plan the site, and begin marking. To do this, we will need support posts, which we will use to mark the boundaries of the height from the surface. We stretch a nylon thread between the outer supports, which should not interfere with your installation of other supports in the future.
In the case when you want to make a break or bend in the fence, you will need to install a load-bearing post in each such place. On each such support we fix the height and compare the overall level of the entire fence frame using a thread.
We mount the poles
Following the example of a corrugated board fence, we describe the step-by-step installation process. For each support, according to our measurements and threads, we prepare a hole where we will pour the foundation.
Important! The length of each pillar must be at least 1 meter above the level of the thread.
After you have dug a hole for each support, we proceed to installing the pillars. To do this, we use a sledgehammer, with which we hammer our support into the ground at the level of the tensioned thread. After this, we fill the hole with crushed stone and broken bricks and compact it thoroughly. At the final stage, fill the remaining space with concrete mortar.
If you plan to make a concrete step, then this will require formwork made of boards, which must correspond to the size of your future foundation. You can also use nylon thread for the level.
During the installation of the supports, we check the verticality of each of them using a plumb line or level.
We weld the frame
Important! Welding work can begin only after the concrete formwork has completely dried.
For our design, you can use a profile pipe measuring 40x20, 40x25, 40x30 and other sizes. Depending on the height of the fence and the thickness of the facing material (for example, 0.7 mm corrugated sheeting), the number of rows of profile pipe will depend. With a fence height of up to 1.7 meters, you can weld two rows of the frame; if higher, then it is better to use an intermediate row to strengthen the structure.
In order for the entire frame to look beautiful and not have distortions, you need to use a level and a tensioned thread, along which we will weld the profile pipe at a certain height to the support.
The top row of the profile pipe should be welded 25-30 centimeters below the top of the facing corrugated sheet. For the lower frame we use the same parameters.
Facing
We purchase facing material with a reserve of at least 1 sheet.
When the frame is ready, we proceed to installing the profiled sheets. To do this, we will need a screwdriver and special metal screws, which should match the color of your fence. We apply the sheet from the very edge along the upper level of the tensioned thread and fix it with self-tapping screws through the wave to the profile frame. Each subsequent sheet is installed overlapping with the previous one.
Important! You should not neglect or skimp on fastening materials, as strong gusts of wind can simply tear off your sheets.
Installation of a wicket or gate
To install driveway or entrance gates, you will need to weld the frame. To do this, you can use a profile pipe measuring 40x25 or larger. We first measure the distance between the future support posts on which your wicket or gate will be fixed.
To strengthen the gate structure, we use slanting strips in the corners and additional rows of profile pipe to eliminate sagging of the gates.
We weld hinges on the support posts and install the frame. We check that the doors close easily and there is no distortion. Now all that remains is to cover the wicket or gate with corrugated sheeting and install a handle or lock. It is best to remove the lock inside the sash frame.
Fence posts must withstand loads acting on the entire fence, so there are quite stringent requirements for their strength.
Choosing materials for poles “by eye” can lead to destruction and significant financial losses.
Materials for pillars can be brick, wood, reinforced concrete, asbestos-cement and wooden pipes.
- Brick supports have sufficient strength, durability, attractive appearance, but require the construction of foundations of significant size, the use of high-quality bricks, and their laying takes a lot of time. All this increases the cost of construction and is not always justified.
- pillars They are installed quickly, are not subject to corrosion, but have significant weight and their installation often requires lifting and transport equipment.
- Wood in some areas it is the most affordable material, easy to process, looks great in combination with the fence and the surrounding nature, but is susceptible to rotting. To increase their service life, wooden poles must be impregnated with special compounds.
- Asbestos cement pipes They are good for everyone, but they do not tolerate mechanical shocks well. It is difficult to attach the veins to the posts. Punching holes in the supports is not recommended due to a decrease in load-bearing capacity, and clamps can ruin the appearance.
- Metal pipes have relatively light weight and sufficient strength. Installation of metal posts and veins by welding is quite simple and does not take much time. A large selection of rolled metal allows you to select materials for any conditions, and ease of processing allows you to produce structures of the required dimensions on site. Metal is susceptible to corrosion and requires protective coatings.
The pillars are subject to loads from their own weight, the weight of the fence and pressure. The supports easily withstand axial loads directed from top to bottom, but poorly - lateral (bending). Since the forces from the weight of the fence are axial, they can be neglected. Please note that this statement does not apply to poles on which a gate or wicket is cantilevered.
Wind loads are lateral, they try to bend the supports and turn them out of the ground, and the amount of effort can be quite significant. It depends on wind speed and air mass. One cubic meter contains 1.22 kg of air. This value depends on pressure, humidity and increases greatly during showers and snow storms. Changes in mass are taken into account in the formulas by introducing a safety factor.
The force acting on one square meter of fence surface is calculated by the formula:
F=0.61V 2 /9.8,
where F is the wind force in kgf, V is the air speed in m/sec, 0.61 is half the specific gravity of the air, 9.8 is the coefficient for converting newtons to kilograms of force. Substituting the speed values into the formula, we can determine that at a wind speed of 5 m/sec a force of 1.56 kgf is exerted on a square meter of fence, at 15 m/sec - 14.01 kgf, at 25 m/sec - 38.9 kgf.
You should know that when wind speeds exceed 25 m/sec, a storm warning is issued, and winds with a speed of 30 m/sec are considered hurricane-force.
Recommendation: For reliable operation of the poles, not only their strength is important, but also the reliability of their attachment to the soil. When the foundations are shallow, hurricane winds can tear out the strongest supports. Therefore, experts recommend burying the supports into the soil to a depth greater than half the span height.
Before calculating the pillars, it is necessary to determine the height and span length. If the dimensions change, the calculation will have to be repeated. For example, let’s calculate a pillar for a span of 2.5 meters long and 2 meters high. We take the estimated wind speed to be 25 m/sec. Then the force will act on the pillar
F=2x2.5x38.9=194.5 kgf.
The point of application of force is 1.25 meters above ground level(half the span height plus the distance from the soil to the bottom edge of the canvas). Then at the zero mark the pole will be affected by a torque
M = FLk = 194.5 x 1.25 x 1.5 = 364.7 kgf m,
where k=1.5 is the safety factor, L =1.25 m is the length of the force application arm.
Maximum permissible pipe bending moment must be greater than the torque acting on the column. It is calculated by the formula:
M = σW/1000,
G where σ is the yield strength of the metal (for steel 10 it is equal to 20 kgf/sq. mm), W is the moment of resistance of the section (cubic mm), 1000 is the coefficient for converting millimeters into meters.
The moment of resistance for a round pipe is determined by the formula:
W=π(D 4 -d 4)/32D,
where n is pi equal to 3.14, D and d are the outer and inner diameters of the pipe in millimeters.
For a square pipe the formula is:
W=(H 4 -h 4)/6H,
where H and h are the external and internal width of the section face.
The sequence of calculations is as follows:
- calculate the torque acting on the pole;
- select a pipe and determine the moment of resistance based on its geometric dimensions, then the maximum permissible bending moment;
- if the maximum bending moment is much greater than the torque, repeat the calculation for a pipe with a smaller diameter, if, on the contrary, a larger one. Calculations are carried out until the optimal option is selected.
According to calculations, for the span chosen as an example, a round pipe with an outer diameter of 89 mm and a wall thickness of 3.5 mm, the maximum moment for which is 386 kgf m, or a square pipe 60x60 mm with a wall thickness of 3 mm and a maximum moment of 457 kgf, is suitable. m.
Conclusion
The given calculation method makes it possible to only approximately assess the suitability of materials for the manufacture of pillars, however, when using it, gross errors in the design of the fence are eliminated. More accurate and comprehensive calculations require knowledge of strength of materials in the scope of the institute course.
A fence made of corrugated sheets is the optimal solution for protecting the territory of a country house or cottage from prying eyes and unauthorized visits. Fences made of this material last at least 30 years. The metal profile is extremely easy to process, and the simple installation method allows you to install a fence around a house or summer cottage quickly and with your own hands, without involving additional labor. Possessing high performance characteristics and durability measured over decades, the metal profile also performs a decorative function, with the help of which you can ennoble a private area, making it not only inaccessible to prying eyes, but also homely.
Construction of a metal profile fence: pros and cons
A distinctive feature of metal profiles (profiled sheets, corrugated sheets) is versatility. In addition to the arrangement of roofing slabs and the construction of temporary utility structures (hangars, sheds, garages, etc.), this material is widely used in the construction of fences and enclosures for various purposes.
The metal profile is made from cold-rolled sheet steel, which, using a special technology, is coated with a layer of zinc and a protective polymer film of various colors. The thickness of the profiled sheet is 0.4–1.2 cm. At the final stage of production, the sheet, laid in rolls, receives a certain profile (trapezoid or wave) using roll forming equipment (manual or automatic).
Good to know: The steel base and stiffening ribs provide increased resistance of the material to deformation and force, and galvanization and polymer coating reliably protect the corrugated sheet from rust and mechanical wear.
For the construction of fences, profiled wall sheets with a profile height of 8 to 44 mm are used. The final cost of the material is influenced by such parameters as:
- thickness of the steel base;
- availability and quality of galvanization;
- quality of polymer coating;
- profile shape and height.
Advantages of metal profiles
The main advantages of using corrugated sheets in the construction of fences and fences include:
- High performance characteristics.
- Low specific gravity.
- Ease of processing and installation.
- Durability and resistance to aggressive operating factors.
- Relatively low cost of material.
The corrugated sheet is well protected from rust, deformation, damage and climatic factors. The material is produced in a wide range of sizes, which allows it to be used for the construction of fences of any height and length.
Good to know: The lightness of the profiled sheet, as well as its mechanical rigidity, greatly simplifies the installation process. In addition, when building a fence from this material, the requirements for the strength of the supporting frame are reduced.
Disadvantages of wall corrugated sheets
The disadvantages of metal profiles used in the construction of fences and enclosures include:
- Low level of sound insulation (a fence made of corrugated sheets will not be able to protect the internal area from noise coming from the street).
- Low resistance to destructive influences (a fence made of such material can easily be broken through, say, by a heavy car, or a hole can be cut in it using a special tool for subsequent penetration into the fenced area).
- Low presentability (corrugated sheeting is significantly inferior in visual appeal to traditional materials used in the construction of fences: wooden and plastic picket fences, metal, brick or stone).
Good to know: Despite the obvious disadvantages, corrugated sheets have no equal in terms of efficiency and are absolutely fire resistant. The material is available in a wide range of colors and a wide range of profile shapes and sizes, which allows you to satisfy almost any aesthetic needs of the buyer.
Photo: types of fences, ideas for implementation on the site
Profiled sheets as decorative cladding on entrance gates 
Fence made of metal profiles on metal supports: view from the inside 
Decorative design of corrugated sheets as part of a country fence 
Fence made of metal profiles with decorative design: view from the inside 
Fence made of corrugated sheets with decorative design 
A fence made of corrugated sheets on a site with a slope 
Corrugated fence with brick pillars 
Metal profile fence on a concrete foundation
Fence design and preparation for construction
It is necessary to carefully prepare for the construction of a metal profile fence. Errors during the design and installation process are unacceptable, since they entail unplanned costs of time, nerves and money.
In order for the construction of the fence to be carried out quickly and not take an unreasonably large amount of effort and resources, at the preparatory stage of construction it is necessary:
- Decide on the type and required characteristics of the metal profile.
- Develop a construction project.
- Calculate the required amount of materials.
- Prepare a set of tools and auxiliary materials necessary for construction.
- Carry out precise marking of the fenced area for construction, taking into account the location of gates, entrance gates, terrain slope, etc.
It is important to remember: After purchasing and delivering the main material to the construction site, it must be carefully stacked and covered to protect it from premature wear and climatic factors before installation work. The location of the stacks should not interfere with the passage, passage or placement of other building materials, elements of building structures, transport, etc.
Which corrugated sheet should I choose?
If the decision to build a fence from a metal profile has been made, all that remains is to choose a material that is suitable in terms of cost and quality. To do this, it is necessary to determine the requirements regarding its protective characteristics, as well as the reliability, durability and resistance of the future fence to wear and damage.
But first it won’t hurt to pre-install:
- conditional life of the fence;
- priority on aesthetics of appearance or operational reliability;
- design features of the fence and the possibility of replacing its individual elements during operation.
The list of key factors determining the choice of profiled sheet for fence construction includes:
- Brand of material.
- Steel thickness.
- The quality of galvanization of the steel base of the corrugated sheet.
- Type of polymer coating.
- Sheet sizes and profile parameters
- Price-quality ratio.
- Durability and wear resistance.
- Aesthetic preferences of the owner of the fenced area.
Profiled sheet marking
The metal profile has a special marking, which determines its main characteristics and purpose. So, for the construction of a fence, grade C (wall) or NS (universal) material is suitable. The numbers in the marking of the profiled sheet mean:
- profile height in mm;
- usable sheet width;
- thickness of the steel base.
It is important to remember: The thicker the steel base and the higher the zinc content in the protective layer, the more resistant to corrosion and deformation the corrugated sheet is. However, nowadays galvanizing technology is used less and less in the production of materials. A much more reliable protection against corrosion, damage and wear is a special polymer coating, which, moreover, can be given a color and even texture that matches the purpose of the metal profile.
Polymer coating and price/quality ratio
The polymer can be applied on one or both sides of the sheet, which significantly affects the overall cost of the material. In addition, the price of the metal profile is determined by the type of this polymer coating:
- Polyester (PE) - film thickness is about 25 microns. The coating is used to protect the inner surface of the material. The film has low resistance to mechanical damage and ultraviolet radiation, which is compensated by the low cost of the profiled sheet.
- Matte polyester (PEM) is a 35 micron thick coating characterized by its lack of shine and resistance to direct sunlight.
- Pural is a protective film about 50 microns thick. It is characterized by elasticity, a high degree of anti-corrosion protection and excellent color quality.
- Polyvinyl fluoride (PVF, PVDF, PVF2) is a coating with high strength and elasticity. Meets increased operational requirements, having excellent resistance to ultraviolet radiation, as well as rust and mechanical damage.
- Plastisol (PVC200) is a universal film with a thickness of 200 microns, designed to protect surfaces of any type. It has high decorative qualities and elasticity, providing reliable protection of steel from corrosion.
Important to know: The dependence of price on the type of polymer coating, which largely determines the durability and wear resistance of the material, is obvious. The greatest demand in the construction of fences and barriers is metal profiles coated with matte polyester, which has an optimal price/quality ratio. Material coated with pural is also popular, since the latter provides not only high aesthetic performance of the corrugated sheet, but also increases the service life of the fence.
Profiled sheet parameters
The strength of wall corrugated sheeting depends not so much on the thickness of the steel base (0.1 cm is enough for building a fence), but on the size, shape and thickness of the ribs (waves) of the profile. Therefore, when purchasing, the main attention should be paid to the height of the latter. For the construction of a fence in an area with normal wind loads, a material with an edge whose height does not exceed 21 mm is suitable. As for the required sheet sizes and amount of material, they are determined based on the required height of the fence, as well as its perimeter. It should be taken into account that the corrugated sheet will be mounted with an overlap.
For the construction of fences and enclosures, four grades of wall corrugated sheeting are used. Their design parameters are given in the table:
Good to know: Wall corrugated sheets are produced in sheets 12 m long, but before sale they are cut into pieces 2–3 m long that are more convenient for transportation and installation.
Correct fence design and calculation of materials, diagram
Before you go to a hardware store to buy materials, you should correctly calculate their quantity, as well as determine the amount of work to manufacture the main elements of the fence structure. This can only be done if there is a detailed project. The latter is easy to develop independently, without involving expensive specialists.
The first and main thing that is necessary for design is the value of the perimeter of the fenced area. If it is not indicated in the cadastral plan, you will have to measure it yourself. For this you will need:
- hammer marks (metal or wooden pegs) into the ground at the corners of the site, as well as at points where the fence changes direction;
- tie the tags with nylon or linen cord;
- calculate the length of the cord between the marks, which will correspond to the perimeter of the area.
The next step is to determine the location and required dimensions of the entrance gates and wickets. It is necessary to place marks on the sides of the latter, measure the distance between them and subtract the resulting value from the total perimeter.
Calculation of the number and sizes of sections
- For example, let’s assume that the plot has a rectangular shape with sides of 20 and 15 m. Let’s take the width of the gate equal to 2.5 m, and set the value for the gate to 1.5 m. In this case, the length of the fence will be equal to: L=(20+15) *2 - (2.5+1.5)=66 m.
- The standard length of the profiled sheet is 12 m, so for ease of transportation and installation it will have to be divided into segments. Therefore, at this stage it is necessary to calculate how many segments will fit in one section along the length.
- We will establish that the gate will be located next to the gate on the 20-meter side of the perimeter. In this case, the length of the fence in this area will be equal to: l=20–4=16 m. Thus, we take the number of sections equal to 3 meters: 2 sections will have a 5-meter length, and the size of the remaining one will be 6 m.
- If we take the length of the sections on the opposite side of the perimeter to be 5 m, their number here will be 4.
- It remains to calculate the number of sections on 15-meter segments of the perimeter. The calculation is carried out in a similar way: we take the length of the section to be 5 m. This means that the width of the rectangle will result in only 6 sections - 3 on each side.
- Let's calculate the total number of sections: n=2+4+6+1=12+1. Thus, the fence will have 12 sections 5 m long and one 6 meter section adjacent to the gate.
Calculation of supports
Having the number of sections, we calculate the required number of supports using the formula:
It follows from this that to install the fence you will need: K=13+1=14 supports.
Important to know: It is convenient to use a profile pipe of square (50*50 mm) or round (d=50 mm) cross-section as support posts for a fence made of corrugated sheets. It should be noted that the length of the supports is a composite value. The outer part should be at least 10–15 cm longer than the corrugated sheet. This is necessary to leave a gap of 5–10 cm high at the bottom and a headroom of about 5 cm in the upper part. So, for a fence 2 m high, the height of the supports will be 210–215 cm. For installation in the ground, another 80–120 cm will be required (depending on the type of soil, freezing depth and groundwater level), and if the fence is installed on a strip foundation - 40–50 cm.
If the necessary requirements for the design of the supports are met, their length will be:
L og =200+15+80=295 cm (when installing supports in the ground);
L op =200+15+40=255 cm (when installed on a foundation).
Calculation of corrugated sheets
Using the height of the fence, as well as the number and length of sections, the required dimensions and number of profiled sheets are determined.
The height of the fence is equal to the length of the section of corrugated sheet. If the fence being designed has a height of 2 m, a standard 12-meter sheet will need to be cut into 6 2-meter pieces. If a profiled sheet of grade C21 is chosen for construction, each 5-meter section will require 5 such sheets and the remaining 6-meter section will require another 6 sections 1 m wide.
As a result, the total number of sections of corrugated sheets 2 m long will be:
N=n 5 *5+n 6 *6=12*5+1*6=66 segments
where n 5 and n 6 are the number of 5- and 6-meter fence sections.
It is important to remember: Installation of the corrugated sheet is carried out with an overlap. This means that each sheet will lose a little length during installation. Thus, when calculating the number and size of sheets relative to the length of the section, the value of the joint size multiplied by 2 should be subtracted from the total length of the sheathing.
Calculation of transverse joists
For fences made of corrugated sheets, a metal profile pipe with a cross-section of 40*20 mm and a length corresponding to the dimensions of each section is used as transverse logs. At the same time, to install a fence 2 m high, you will need no more than 2 tiers of crossbars.
This means that the number of logs for the calculated fence will be:
k=k s *2=13*2=26 lag
where k c is the number of fence sections.
Final result
As a result of the research, it was found that to build a fence around the area in question it is necessary:
- 26 crossbars;
- 14 support pillars;
- 66 sheathing sheets, 2 m long.
Next, all that remains is to re-draw the diagram of the site and apply a projection of the fence on it indicating the number and size of sections, the location of gates and gates and other important data. The construction project can be considered ready.
Necessary tools and auxiliary materials
In order to independently make and install a fence from corrugated sheets, you need to prepare the tools in advance, which you cannot do without during the work process.
This list should include:
- bayonet and shovel;
- concrete mixer (if the fence is installed on a foundation or the supports will be installed on concrete);
- earth drill (for installing support pillars in the ground);
- electric scissors;
- metal scissors;
- electric drill with a set of metal drills;
- screwdriver;
- welding machine;
- circular saw with metal discs;
- construction tape;
- measuring cord;
- building level;
- plumb line
In addition to the basic materials of corrugated sheets and profile pipes for the manufacture of supports and transverse joists for the construction of the fence, auxiliary tools will be needed.
The list of the latter contains:
- sand;
- crushed stone;
- cement;
- primer for metal posts and crossbars;
- paint;
- metal screws or other fasteners for mounting the casing.
It is important to remember: When cutting metal, during the construction of a foundation or installing supports in the ground, as well as when installing crossbars and fixing profiled sheets, it is very important to follow safety precautions. This will avoid injury, as well as material damage and tool breakage. When performing work operations, you should use safety glasses, gloves and protective clothing. And most importantly: you need to prepare a free area for work, where nothing will interfere with the manufacture of fence elements, and supply electricity to it to connect power tools.
How to build a fence from corrugated sheets with your own hands: step-by-step instructions
After marking the territory and preparing materials, it’s time to start construction. The general algorithm of actions is as follows:
- pouring the foundation with installation of vertical supports on it;
- installation of support pillars in the ground;
- installation of transverse joists;
- priming and painting of the metal frame;
- installation of sheathing;
- decorative design of the fence.
Good to know: If the installation of the supporting frame is carried out by welding, the welds must be cleaned. You should also weld appropriately shaped plugs onto the support posts, which will prevent moisture from getting inside the pipe. It is better to make holes in the metal before assembly, although, if you have a powerful drill and a high-quality drill bit, they can be made after. It is advisable to apply primer and paint to the metal frame before installing the sheathing so as not to stain the new profiled sheet.
Laying the foundation for a corrugated fence
If the conditional service life of the fence exceeds 20 years or the nature of the soil or the layout of the site do not allow installation in another way, the fence is installed on a strip reinforced concrete foundation.
The foundation is poured in several stages:
Using a concrete mixer, a concrete solution is made from sand, crushed stone, cement and water, with which the trench is filled to the required level. During the process, you should periodically check the verticality of the support posts or fix it to the formwork with a lock made from waste boards.
It is important to know: The soil will not take moisture away from the concrete if the bottom of the trench is moistened abundantly before pouring. The finished foundation should be allowed to dry for at least 3 days, after which you can begin installing the transverse joists.
Installation of support pillars in the ground
If the fence is planned to be used for no more than 15–20 years, the fence is temporary, or the soil or layout of the site allows installation without pouring the foundation, the support pillars are installed in the soil.
There are several ways to install supports, the choice of which depends on the nature of the soil, the depth of groundwater and the height of the fence:
- driving;
- partial concreting (combined installation);
- butting (installation on a bed of sand and crushed stone);
- full concreting (with reinforcement);
The algorithm for installing fence supports in the soil looks like this:
- Plugs are welded at the upper and lower ends of the supports, which will prevent moisture and soil from entering the pipe.
- The corner supports and pillars along the edges of the gates and gates are installed first. In this case, it is necessary to carefully monitor the vertical level of the supports.
- The installed corner posts are tied with twine or rope to mark the fence line.
- The remaining support posts of the fence are mounted along the perimeter in the same way, observing the vertical level and the line set from the corner supports.
Important to know: To enhance the load-bearing capacity of concrete or partially concreted supports, the hole can be reinforced using thin (d=10 mm) reinforcement.
Installing fence supports on a sloped area
If the land has a slope, a number of additional steps must be performed when pouring the foundation or installing support pillars. In particular, with a slight slope, the soil should be simply leveled.
When installing a fence on a foundation on an area with an average slope, the procedure will be as follows:
When installing supports in the ground on a site with a slope, the depth of the holes is adjusted in the same way: the bottom of the hole of the first support of the next level should be at the level of the middle of the hole of the last support of the previous one.
Important to know: The difference in height levels should be the same along the entire length of the fence.
Installation of supporting frame
After installing the support pillars in the ground or on the foundation, the transverse joists are installed. They can be installed by welding or using special “crab” fasteners.
When installing on "crabs" in the supports and transverse joists, it is necessary to make holes of the appropriate diameter for bolted connections.
Installation of crossbars for welding is carried out in one of three ways: the logs are butt welded, on the sides of the support column, or fixed using a holder pre-welded to the support (a piece of U-shaped profile of the required dimensions).
Good to know: The location of the logs and the distance between them depends on the height of the fence. If the latter is 2 m, you need to subtract 40–50 cm from the upper edge of the support - the upper line of the crossbars will be attached at this level. Further down we retreat 100–120 mm and mark the level of installation of the lower logs. Then the distance from the lower cross member to the ground will be: l=200–40–120=40 cm.
Sheathing with metal profiles and finishing, painting the fence
If the installation of the frame is completed, and plugs are welded on top of the supports, you can proceed to the final stage of construction - cladding the fence. To do this, holes for fastening elements are made in the transverse logs with a pitch equal to the pitch of the profiled sheet. Before starting work, it is important not to forget to calculate the location of the joints of the metal profile; its sheets are attached directly to each other, bypassing the crossbars.
After installing the sheathing, the fence can be decorated with decorative elements. For example, by forging or beading along the upper and/or lower edge of the profiled sheet. You can also additionally protect the screw heads and bolted connections with special plastic plugs.
It is important to remember: When joining sheets with an overlap, installation is carried out on the upper wave of the profile. The corrugated sheet is fixed to the crossbars in the center of the lower wave of the profile.
The construction of a fence from corrugated sheets requires thorough preparation and, most importantly, correctly performed calculations. Then, if you do not make gross mistakes during installation, the work will not take much time and effort. For example, to fence an area with a perimeter of 60–70 m, it will take only 3–4 days, of course, provided that you don’t have to dig a lot to level the soil. The result should be a reliable and durable fence that will serve as excellent protection for the site from prying attention and will greatly complicate unauthorized entry into the fenced area.
In order to deliver an excellent, strong and attractive one, it is necessary to correctly calculate the amount of material that will be needed during the work. The reliability of the fence itself, the time spent on the entire construction process, and the financial costs of delivery, preparatory work, and installation of the fence will depend on this.
In our article we will look at exactly what factors influence the calculation of components for fencing, and what the cost of such a structure might be.
Calculation factors: building a new fence
To calculate the profiled sheet needed for future construction and other components, it is necessary to take into account some factors. We always remember that any fencing is an individual design, even when using standard materials.
But even with the simplest forms, the fence will consist not only of a profiled sheet, but also of support pillars and cement for pouring the support, transverse rows (joists that give the structure additional strength and rigidity). Such designs are impossible without a gate or small wicket.
For fencing, it is used with a wave height of ten to twenty millimeters, which can be simply galvanized (the cheapest option) or with a polymer colored coating on one or two sides (the cost rises by about forty percent).
The support pillars are made from a square profile pipe, the cross-section of which depends on the height of the fence.
Corrugated sheeting allows you to make fences up to eight meters high, which does not affect the strength. Logs are also needed, the number of which can vary and on which the corrugated sheeting and fastening elements will be attached: self-tapping screws and steel rivets for joints.
How much does a corrugated sheet fence cost?
So, how much can a corrugated sheet fencing cost? First of all, it is necessary to take into account the length of the future fence, height, type of structure (with a foundation, without a foundation, combined options).
The main elements that will make up financial expenses:
- , which can be simple galvanized or polymer-coated. PS-10, PS-20 are best suited.
- Logs (cross members). An economical option is logs made of wood, the most durable is made from a profile pipe. The number of logs, or rows, depends on the height of the structure.
- Foundation for support pillars (you don’t have to do it, but it will be more reliable with a foundation).
For example, let’s calculate the material for a fence with a height of two meters and a length of thirty linear meters. In order to correctly calculate the number of components, we need to decide on the design of the fence itself. In this case, it will be a simple fence with support posts that will be cemented into the pits.
We use the PS-10 grade, which is ideal for such work. The total sheet width is 1180 millimeters, and the working width is 1140 millimeters. With a total length of the future building of thirty linear meters, we will need twenty-seven sheets. We calculate it this way: divide the length by the usable width and get a value of 26.32 sheets.
The resulting figure must be rounded up, that is, we get twenty-seven sheets. The total area of this product will be 63.72 square meters, which is calculated as follows: the number of sheets is multiplied by the total width and the height of the future fence.
Now we need to calculate the number of pipes for the support pillars; we take a pipe with a cross section of twenty by forty millimeters. We will need thirteen pillars of two meters and eighty centimeters, that is, 36.4 linear meters. This is calculated in this way: the length of the future fence (thirty linear meters) is divided by the length of one span (two and a half meters).
We get a value of twelve spans, that is, we will need one more pillars - thirteen pieces.
When purchasing, it is best to immediately ask the seller to cut the poles, which will reduce the cost of delivery and eliminate the need to cut pipes on site ourselves (that is, we will not need some tools).
For logs (cross members), it is best to take a profile pipe with a cross section of twenty by twenty millimeters. We will need three rows of logs (since the height of the fence is two meters). We calculate the total quantity in this way: we multiply thirty linear meters (the length of the fence) by three (the number of rows) and get the number of logs - ninety linear meters of material.
To fasten the support pillars we will need two bags of cement, sand and gravel. For fastening corrugated sheeting, use roofing screws at the rate of up to eight pieces per square meter.
Now we calculate the total cost using a regular calculator:
- corrugated sheeting for the fence - approximately 14,450 rubles;
- profile pipe for crossbars - up to 4800 rubles;
- pipe for support pillars - up to 2,590 rubles;
- cement, sand, gravel - from 800 rubles;
- self-tapping screws, the cost of which may vary.
The cost of order delivery will depend on the mileage and who carries it out (seller or buyer).
As we can see, the calculation of products can be done using a regular calculator: no complex formulas or calculations are carried out here. But when carrying out calculations, it is necessary to take into account all the above factors that will help make this process more accurate.
So, a 2-meter span of a typical fence 2 meters high (i.e., one fence post) is subject to wind load:
F = 2 x 2 x 38.9 = 155.6 kgf
The load application point (L) is determined in the middle of the corrugated sheet (1 m) plus the distance from the bottom edge of the corrugated sheet to the ground (take 25 cm). Thus, the wind force acting on the fence post causes a bending moment at the point where the post exits the ground (maximum loaded section) in the amount of:
M = FLk = 155.6 x 1.25 x 1.5 = 291.75 kgf m
where k is the same safety margin mentioned above. In our case k=1.5.
We emphasize that the moment determined above acting on the post is calculated for a fence with our characteristics. Namely: the height of the corrugated sheet is 2 m, the pitch of the pillars (span) is 2 meters, the distance from the lower edge of the corrugated sheet to the ground is 0.25 m. Changing any of the parameters entails a change in the load on the pillar and requires mandatory recalculation!
Now all we have to do is select a pipe size whose bending strength covers the specified moment. The maximum bending moment of a metal beam is determined by the formula:
M = σW/1000
Where σ is the yield strength of the material (kgf/mm2), W is the sectional moment of resistance (mm 3), and 1000 is for converting units from mm to meters.
The yield strength for steel St1ps, St10 (from which pipes of ordinary quality are made, sold on the markets) is 20-21 kgf/mm 2. The moment of resistance is calculated by the formula:
W=π(D 4 -d 4)/32D– for round pipe
W=(H 4 -h 4)/6H– for square pipe
We obtain the breaking bending moments for various pipe sizes:
Round pipe
| Pipe outer diameter, mm | Wall thickness, mm | Destructive moment, kgf m |
| 60 | 2 | 102,28 |
| 60 | 3 | 145,85 |
| 76 | 2,5 | 205,41 |
| 76 | 3 | 241,62 |
| 76 | 3,5 | 276,31 |
| 76 | 4 | 309,53 |
| 89 | 3 | 337,19 |
| 89 | 3,5 | 386,74 |
| 89 | 4 | 434,52 |
Square pipe
| External pipe size, mm | Wall thickness, mm | Destructive moment, kgf m |
| 60 | 2 | 173,64 |
| 60 | 2,5 | 211,63 |
| 60 | 3 | 247,61 |
| 60 | 3,5 | 281,64 |
| 60 | 4 | 313,8 |
| 80 | 3 | 457,23 |
| 80 | 4 | 586,92 |
From the presented tables it can be seen that for use as pillars for a solid fence with our initial parameters (pitch - 2 meters, height of corrugated sheet - 2 meters), a round pipe is suitable, starting from a standard size of 76x4 mm, a square one - starting from 60x4 mm (highlighted in green) . The higher the fence and the greater the distance between the posts, the more durable the pipe you need to choose.
The choice of a round or square pipe should be made not only on the basis of design and aesthetic preferences. It is necessary to take into account a number of engineering and economic factors. The issues of choosing the cross-section of fence posts are discussed in more detail in Prices for a fence made of corrugated sheets