Welding of trusses from a profile pipe. Calculation and manufacture of metal trusses from a profile pipe. Types of shaped pipes

A canopy is a useful structure for any area: it is a good temporary shelter for a car, it can be installed over the pool, under the canopy you can put a tea table or arrange tools. But in order for it to be practical and useful, first of all, you need to take care of its strength and maximum durability.

The simplest structure consists of several vertical posts and a horizontal frame to which the roof rafters are attached, but such a structure is not suitable for a large canopy. To cover a wide space, you will need to build a large frame, and for this you need to correctly calculate and weld metal trusses for a canopy with your own hands.

What are canopy trusses

A truss is a complex metal frame made of individual elements joined by welding. The main elements of the truss are the upper and lower chords, which are connected by vertical posts and braces. The advantage of such structures is that they can withstand significant loads and firmly endure any whims of nature, reliably holding the canopy.

You can buy such a frame ready-made, or you can make it yourself. This will require knowledge of the laws of physics and accurate calculation. Several forces act on the frame at once, it is necessary to accurately determine the balance points so that the structure can withstand even high loads.

What and how to properly weld a canopy farm? The main material for their manufacture is shaped pipes. This option has several advantages:

How to correctly calculate the structure of the truss

Metal trusses from a profile pipe for a canopy are calculated in accordance with SNiP 2.01.07-85; calculations will require a calculator and special software. Design work is carried out taking into account the following factors:

Scheme and contours of the canopy. You need to think about what its roof will be like: shed, gable, domed, arched, hipped - there are many options, each of which has its own requirements. The type of upper and lower chords of the truss depends on the selected frame. The easiest option is to build a conventional shed with a pitched roof.
Canopy dimensions. This is a very important parameter: the greater the distance between the trusses, the more load they will have to withstand. You also need to determine the upper and lower points of the slope and the distance between them. The more the slope, the less snow will accumulate on the roof.
Sizes of roofing material panels. The distance between the farms directly depends on them. Typically, cellular polycarbonate is chosen for home sheds, so you need to find out the width of the sheets.

Cellular polycarbonate is easy to bend, so you can use it in the construction of arched and other curved canopies. You can also use profiled sheet, metal tiles, slate and other materials.

Snow and wind load in the region. They can be recognized by special maps: find your region and determine how much snow should exert on the floors of structures.

The design scheme is quite complicated, it will be difficult to figure it out on your own without an engineering education. If you know the main parameters of the future canopy, you can easily find a ready-made project on the network in order to avoid mistakes in calculations. If you decide to determine the load yourself, it is better to show all calculations to a specialist.

It should be borne in mind that the greater the distance between the upper and lower points of the truss, the greater its bearing capacity: less snow will accumulate on the roof, in addition, it will not suffer from other loads. However, more material for the roof will be required.

Polycarbonate sheets are attached to the metal frame using special profiles, you can also use ordinary self-tapping screws with O-rings and thermal washers. With their help, you can create a strong mount that is protected from corrosion.

An example of calculating a truss to create a simple lean-to shed

Let's take a closer look at the process of building a lean-to carport, the size of which is 6x4 meters - this is the most common solution for temporary car storage. A polycarbonate sheet is used as a roofing material, its width is 2.1 meters.

Therefore, the trusses should be located under the edge of each sheet, as well as in the middle. For the calculation, you can use software that will visually represent each element and carry out the necessary calculations.

How to cook a canopy farm properly? For construction, profile pipes with a cross section of 30x30 mm are used, the length of the upper pipes is 3900 mm, the lower ones - 3100 mm. The distance between them will be 150 mm, inclined spacers will be welded along the edges.

For inclined spacers, you can use profile pipes with a section of 20x20 mm, they will be located at an angle of 25 degrees. They should be welded in a zigzag pattern between the upper and lower truss tubes.

The basis of the metal frame will be two longitudinal profile pipes with a section of 30x30 mm. Longitudinal bridges will be located between the trusses, the length of which, taking into account the snow load, will be half a meter. Vertical canopy posts are made of the same pipe, they must be located under each truss on both sides.

The racks must be concreted at a depth of 60-80 cm, then they can withstand even a very heavy load. Another option can be used: concrete embeds are installed in the ground, to which metal racks are attached.

After preparing all the materials, you can proceed to welding. Only a person with a special education has the right to weld a metal frame, it is imperative to take care of all personal protective equipment.

In some cases, most of the frame elements are collected on the ground and only then rise to the supports. This allows you to simplify the welding work, but for the installation of heavy trusses on the frame, you will have to involve people and equipment.

Metal frame assembly process

Welding of trusses from a profile pipe for a canopy and a metal frame is carried out as follows:

The strength of the frame and the reliability of the canopy directly depend on the quality of welding and compliance with all requirements. To prevent the structure from collapsing due to construction errors, it is better to carry out welding work on your own only if you have proven experience. It is better to pay for calling a specialist than to pay for a new carport and repair of the damaged car in the future.

Important conditions when building a canopy

Knowing how to cook farms for a shed, you can develop quite complex structures, but it is advisable to coordinate each project with specialists. Safe metal structures must comply with the requirements of GOST 23118-99, technical documentation contains all the rules for assembling elements.

The minimum slope of the pitched canopy is 25-30 °, this will ensure a gradual, even snow melting. The wall thickness of the profile pipes used for the frame should be at least 3 mm, this is an important condition for strength.

For truss lintels, pipes with a wall thickness of 2 mm can be used. It is important to know that the distance between the trusses should not be more than 1.75 meters, otherwise the load on the frame may turn out to be uneven, and the polycarbonate will begin to sag due to its heavy weight.

Polycarbonate sheets or other roofing material should protrude from the frame by at least 10-15 cm on each side - this will protect metal elements from rain moisture and subsequent corrosion. The side parts of the polycarbonate sheets are closed with special profiles so that dust and debris do not accumulate in the cells.

A farm is a simple architectural structure with a multi-purpose purpose. Most often, it is needed to protect a small recreation area from bright sunlight and unforeseen precipitation, or as an alternative to a covered building on the site of a country cottage. Metal pipes are used as a material for the durability of the structure. But before starting construction work, you will need the correct calculation of the truss from the profile pipe for the shed.

Benefits of profile pipes for trusses

Profile pipes have a number of advantages:

Optimum stability under significant external loads, due to which the canopy does not deform or collapse.
Reasonable price of the finished product, because hollow metal pipes are used as a starting material.
Light weight due to filling the inner cavity of the profile pipes with air.
Excellent durability.
Long service life.
The ability to implement the most complex design options, without investing a lot of time and effort.
The admissibility of making it with your own hands with the correct calculation of the truss from a metal pipe (read also: "").

The use of shaped pipes of all kinds

Today, such tubular products are relevant in agricultural mechanical engineering, construction, furniture production. Due to the specific properties of shaped pipes, it is possible to implement the most original projects for the creation of floors, spans, support structures, frames for the subsequent construction of objects. The same modern billboards are made using shaped pipes.

The awnings were also no exception. To make the construction guaranteed to be reliable and budgetary, it is better to use a profiled pipe as a material (read: ""). The optimal solution is products with square and rectangular sections. If you adhere to the dimensions of the drawing, from which it is clear how to weld a truss from a profile pipe, you will get a stable structure.

The main nuances of the finished product

Any building structure is supported by a properly planned special system or truss. You can't just change its geometric dimensions, even when changing rigid nodes to hinged ones. If the members do not carry loads outside the node, the truss components are compressed or stretched. Such systems can be created using straight bars connected by tubular truss nodes. That is, as a result, an original hanging structure is obtained, including the upper and lower chords with uprights and braces between them.

Today, modern construction is unthinkable without the use of trusses. But most often the latter are in demand when erecting coverings of huge spans. According to this principle, sports complexes, bridges, stages, podiums, pavilions, etc. are built. Anyone who needs such a structure can buy it ready-made or weld it on his own from pipes, but first you need to figure out how to calculate a canopy from a profile pipe.

Consider the last option, which is a lengthy and time-consuming exercise.

It includes:

Determination of the exact amount of pipe material for the future truss and the degree of pressure on the elements of the system.
Responsible approach to the selection of material for a triangular truss. The optimal solution will be lightweight profiled pipes with a square section. Hence, a solid construction is obtained.
Making a drawing of a truss from a profiled pipe, taking into account the characteristics of each detail. In the future, the entire building will be assembled on it.
The last stage is the implementation of installation work, on which the reliability and duration of the operational capabilities of the structure depend. And for a positive result, you need to know thoroughly how to properly weld trusses from a profile pipe. Read also: "".

The choice of a truss structure from rectangular elements depends on:

span length;
placement of the attic overlap;
roof slope angle.

How to calculate a farm

Here are the standard steps for this procedure:

Selection of the desired scheme of a triangular truss with an orientation to the required configuration. At the same time, attention is paid to the main function of the canopy, the materials for its construction, and other characteristics.
Determination of clear dimensions of the future structure. For example, the height depends on the type of roof and the materials used. With a span of over 36 meters, it will be necessary to additionally calculate another parameter - the building lift, which is related to the damped bend - the reverse of the pressures on the truss.
Calculation of the dimensions of the building panels, clearly corresponding to the distance between the structural elements that transmit the loads in the system. Next - determining the length between the nodes. Most often, such a parameter is considered identical to the width of the panel. Read also: "".

According to a similar scheme, but with its own specific nuances, you can calculate an arched truss from a profile pipe. It is better to take the standard steps of the procedure as a guideline.

After determining all the digital values for the construction of a future farm, you need to write them into the formulas and enter them into the appropriate computer program, which will give a clear design diagram. And only after all these actions can one start studying another, no less serious matter - how to properly weld a truss from a profile pipe. The quality of further installation work depends on the professionalism of specialists in this field.

A canopy made of pipes and polycarbonate is becoming an increasingly popular architectural form in the backyard. No wonder, because this structure can perform many functions, ranging from an open garage for a car, a wood storage, an indoor playground and ending with a recreation area with barbecue and soft armchairs.

The key advantage is the ability to make such a structure with your own hands. The presented article will give recommendations on the choice of material, examples of calculations for supports and trusses, and how to weld a canopy from a profile pipe.

Calculation of the optimal shape of the canopy

The length of the rafter depends on the angle of inclination of the truss. For different angles, the use of different roofing materials is optimal:

22-30 is the optimal tilt angle for buildings in areas with significant snow loads. As a structure of a canopy from a profile pipe with such an angle, it provides a predominantly triangular shape. It is optimal for asbestos straight and corrugated sheets, various types of metal profiles and eternit roofing.
15-22 - are also gable with metal types of roofing. This angle of inclination is typical for regions with increased wind loads. The maximum span of a triangular truss with this angle is 20 m.
6-15 - predominantly single-pitched trapezoidal trusses with polycarbonate and corrugated board cover.

Shed canopy made of a profile pipe, photo of a building with a roof made of corrugated board

The calculation of a polycarbonate canopy from a profile pipe is carried out in accordance with SNiP P-23-81 "Steel structures" and SNiP 2.01.07-85 "Loads and impacts".

The technological requirements for the farm and the calculation sequence are as follows. In accordance with the terms of reference, the required span is determined. According to the presented scheme, we substitute the dimensions of the span and determine the height of the structure. The setting of the angle of inclination of the truss and the optimal shape of the canopy roof is performed. Accordingly, the contours of the upper and lower chord of the truss, the general outline and the type of roofing are determined.

Important! The maximum distance at which the trusses are placed when making a canopy from a profile pipe is 1.75 m.

Diagram of the dependence of the length of the rafters on the angle of the roof when calculating a truss from a profile pipe for a canopy

Profile selection

As a material for assembling a truss, you can use channel bars, T-bars, corners and other profiled rolled products that are made of steel grade St3SP or 09G2S (in accordance with GOST). However, all these materials have a significant drawback compared to profiled pipes - they are much heavier and have greater thickness with comparable strength characteristics.

The dimensions of the frame elements for a canopy made of a profile pipe depend on the dimensions of the building. In accordance with GOST 23119-78 and GOST 23118-99, the following materials are used to create a canopy from a square pipe with their own hands:

For compact buildings with a span of up to 4.5 m - 40x20x2 mm;
Medium-sized structures with a span of up to 5.5 m are made from a 40x40x2mm professional pipe;
Structures of significant size with spans of more than 5.5 m are mounted from shaped pipes of various sections 40x40x3 mm or 60x30x2mm.
The size of the rack for a canopy made of a professional pipe is 80 80 by 3 mm.

Drawings, dimensions and basic connections

Before proceeding with the assembly of a canopy from a profile pipe with your own hands, you need to draw a detailed plan of the entire structure with indications of the exact dimensions of all elements. This will help you calculate the exact amount of materials of each type and calculate the cost of construction.

Drawing of a canopy from a profile pipe with an indication of the main overall dimensions

In addition, it is desirable to make an additional drawing of the most complex structures. In this case, this is a single-pitched truss and the fastening nodes of its main elements.

Scheme for the manufacture of a truss from a profile pipe for a canopy with the main fasteners

One of the main advantages of a profile pipe is the possibility of a gusset-free connection. This is manifested in the simplicity of the design and low cost of the truss with the length of the rafter spans up to 30 m, while the roofing material can rest directly on the upper chord of the truss, provided it is sufficiently rigid.

Attachment points for assembling a canopy from a profile pipe with your own hands, in the photo a - a triangular lattice, b - a supporting lattice, c - a diagonal lattice

The advantages of a bezel-less welded joint are:

Significant reduction in the weight of the truss, in comparison with riveted or bolted structures, up to 20% and 25%, respectively.
Reducing labor costs and manufacturing costs, both for single-piece products and for small-scale production.
Low cost of welding and the ability to automate the process by using machines with a continuous welding wire feed device.
Uniform strength of the welded seam and the products to be joined.

Among the shortcomings, it can be noted:

The need to have rather expensive equipment;
Experience in welding is required.

Bolted joints in the manufacture of products from a shaped pipe are quite common. They are usually used in collapsible canopies made of shaped pipes or in products manufactured for mass consumption.

Bolted connections are the easiest to install a canopy from a profile pipe with your own hands, a photo of the attached frame element

The main advantages of such compounds are:

Ease of assembly;
No additional hardware required;
The possibility of complete dismantling of the structure.

Disadvantages:

The weight of the structure increases;
Additional fasteners are required;
The strength and reliability of bolted connections is slightly lower than welded ones.

Summing up

The article examined the design and methods of making the simplest single-pitched canopy from a profile pipe with your own hands, however, a profiled pipe is a rather "flexible" material from which complex and aesthetically attractive structures can be made.

A complex structure for creating a canopy from a professional pipe with your own hands, a photo of a lean-to, domed structure

Before creating an arched canopy with your own hands, a drawing and calculation of all elements and attachment points are made.

The drawing and the project will help resolve issues regarding the range and quantity of purchased building materials, the interior and exterior of the metal structure and the design of the entire site.

Polycarbonate canopy drawing

Calculation of the strength of supports and trusses;

Calculation of the resistance of the roof to the wind load;

Calculation of the load on the roof in the form of snow;

Sketches and general drawings of an arched metal canopy;

Drawings of the main elements with their dimensions;

Design and estimate documentation with the calculation of the amount and cost of building materials.

The basis of the construction of a metal canopy according to the drawing is a rafter truss. Calculating the shape, thickness, section and location of truss slopes is complex. The main elements of the truss are upper and lower belts that form a spatial contour. The assembly of the arched truss for the canopy is carried out on arched beams. A feature of the arched truss is the minimization of bending moments in structural cross-sections. In this case, the material of the arched structure is compressed. Therefore, the drawing and calculations made are carried out according to a simplified scheme, where the roof load, the load of the fastening lathing and the snow mass are evenly distributed over the entire area.

Polycarbonate canopy project

The canopy project and its drawing include the following calculations:

Reaction of horizontal and vertical supports, stress in transverse directions, which will affect the selection of the cross-section of the bearing profile;

Roofing snow and wind loads;

Section of an eccentrically compressed column.

Arch truss calculation table

The truss is the backbone of the entire cover. To install it, you will need straight rods connected at hinge or rigid nodes.

The truss includes chords of the upper and lower views, racks and braces. Depending on the loads exerted on all elements of the arched truss, the material for it is selected. The loads on the structure are determined in accordance with the requirements of SNiP. For which a structure diagram is chosen, where the contours of the truss belts are indicated. The scheme depends on the function of the canopy, its roof and its placement angle.

Arch truss calculation table

After that, the dimensions of the farm are determined. Its height of the truss depends on the roofing material and the type of truss - stationary or mobile. Its length is optional. With spans between posts from 36 m, the building lift is calculated - the reverse bend of the truss from the perceived loads. After that, the dimensions of the panels are calculated, which depend on the gap between the elements that distribute the load on the truss structure. The distance between the nodes depends on this. The coincidence of both indicators is required.

At the arched truss, the guide is the lower belt, made in the form of an arc. The profiles are connected with stiffeners. The radius of the arch can be anything and depends on the natural conditions of the location of the farm and its height. The quality of the truss structure depends on the bearing capacity. The higher the farm, the less snow will linger. The number of stiffeners helps to withstand the stresses. It is better to weld all the details of the canopy.

To begin with, the coefficient μ is calculated for each span of the upper-view belt - the rolling load of the snow mass on the ground on its load on the structure. Why do you need to know the angle of inclination of the tangents. With each span, the corner radius becomes smaller. To calculate the load, the indicators Q are used - the load from snow on the 1st node of the truss, and l - the length of the metal rods. For this, the cos of the angle of the floor is calculated.

The load is calculated by the formula - the product of l and μ and 180. By combining all the indicators together, the total load of the arched truss on the soil is calculated and the materials and their dimensions are selected.

Manufacturing of a lathing from a profile pipe and covering the truss with polycarbonate

Profile pipe trusses are durable, strong and economical. Profile tube - a metal profile, rolled and processed using machine tools.

By the type of section, they are classified into oval, rectangular and square profiles. Trusses made of arched shaped pipes have high strength, long service life, the ability to construct complex structures, affordable cost, low weight, resistance to deformation and damage, moisture and rust, and the ability to finish them with polymer paints.

For assembly or fastening of elements, paired corners are used. When designing the top belt, two T-corners of different lengths are used.

The corners are joined by the smaller sides. The lower belt is connected by corners with equal sides. When connecting large and long trusses, overhead plates are used.

Paired channels distribute the load evenly. The braces are mounted at an angle of 45, and the racks are mounted at an angle of 90.

After assembly, they begin welding, after which each seam is cleaned. The final stage is treatment with anti-corrosion solutions and paint.

Sheets of polycarbonate are installed on the finished farm - a translucent plastic that is able to protect from weather precipitation. This takes into account the thickness and shape of the sheet used. With a large bend radius, cellular polycarbonate is used from 8 to 10 mm in thickness. With a small radius - monolithic wave up to 6 mm.

The trusses from the profile pipe are designed to give rigidity to the entire structure of the canopy and to connect the racks together. Formed arches are the basis for attaching polycarbonate. It is recommended to use the same corners as in the manufacture of trusses. A rubber backing should be provided so that the material does not come into direct contact with steel elements, which will save the visor from rapid wear.

To install the canopy racks, a columnar base is made, whose dimensions are 5-7 cm larger than the dimensions of the support. To protect against water and moisture, the base is covered with roofing felt. In the process of pouring the foundation, the fastening pins are installed.

After installing the polycarbonate canopy, the truss is fastened, which connects all the canopy elements into a common frame. Cutting and installing polycarbonate sheets:

Thermal washers are used to compensate for the expansion of plastic from high temperatures.

The ends of cellular polycarbonate are processed with vapor-permeable tape.

The outer side must remain in its original packaging to protect it from fading.

Arrangement of stiffeners along the arc. When using monolithic wave polycarbonate, the direction of the bends coincides with the arches.

The structure of an arched truss for a canopy - a calculation table for dummies, an online calculator, the manufacture of lathing, a 6 by 6 canopy project from a profile pipe, polycarbonate, metal structures - a sketch, a drawing

Profile tube trusses have many advantages. With their help, nowadays, they build residential buildings of any configurations, garages, as well as some homestead structures. They are also used to create greenhouses. At their cost, farms are not expensive for the owners of the plots. They can be quickly designed and fastened to the supporting elements. For reliable fastening of this structure, you will need a high-quality profile, a welding machine, a grinder and care when designing.

Anyone who decides to use this type of structure on their structure should have a clear plan, consisting of:

Choosing the right profile;
A clear calculation of the farm;
Correct location of jumpers;
Safe installation.

At its core, a truss is a unique structure that connects supporting elements and forms a finished frame as a result. Among specialists, it is considered a simple architectural metal structure. This configuration has many advantages:

The strength of the entire frame and separately the farm itself;
High performance characteristics;
Reasonable cost, taking into account the prices of pipes and consumables;
Excellent resistance to external influences, deformation.

Profile pipe trusses have become very popular due to the fact that they are ideal for creating strong supports for any type of roof. At the same time, these indicators are not affected by the weight of roofing materials.

Roof trusses can have completely different structural shapes and arbitrary braces. For example, for household buildings, a shed form is used. It is easy to install and can withstand a wide variety of loads. Gable samples are more suitable for garages and houses.

The arched truss is also distinguished by its shape. It has a convex shape and is considered one of the most durable.

For the correct calculation of trusses, certain rules must be followed.

Making the trusses doesn't take long. It all starts with the choice of quality material. He will determine the durability of the entire structure. The connection of all metal parts is using tacks, as well as special paired corners.

Angles with equal sides are mounted only in the case of mating parts.

The uprights are attached at a 90-degree angle and the braces are attached at a 45-degree angle.

Example of a finished truss structure

Requirements for the calculation of a profile pipe for building a farm

Primary requirements:

Calculations are made using all measurements of the length of the structure and the angle of inclination of the roofing material. The preparation of the farm should begin only after taking clear measurements of the indicators.
The exact dimensions depend on many factors. A certain type of design will be determined based on the weight of the entire product, load, height of the roofing material, as well as the methods of its movement. Only the length of the workpiece determines the angle of inclination of the roof.
In the calculations, it is initially necessary to include supports and clearly define their belts. Length matters. Contours also depend on the slope and type of construction.

Basically, two legislative documents are responsible for this, which determine the calculation procedure. One contains information on exposure standards and allowable loads, and the other will help determine the type of steel structure. With their help, the calculation of a truss from a profile pipe can be carried out quickly and as correctly as possible.

The most important thing to consider is that the calculation is made on the basis of the principle of economy. After determining the span height, length and angle of inclination of the entire structure, the calculation ends with the last point - the establishment of the optimal distance between all component parts. The span load affects the amount of material and its location.

Calculation of an arched truss from a profile pipe

You can determine the optimal values of the structure using a specific example of an arched truss. The length of the structure is 600 cm. Each section is located at a distance of 105 cm from each other. The height of the arched ceiling is 300 cm. The arrow of the lower chord in such a product will be 130 cm. The radius of the circle at the bottom will be 410 cm. According to the calculation conditions, the angle between the radii is 105.9776˚.

Legend:

mn - the length of the profile, which is necessary for laying the lower tier;

π - constant value;

R - radius.

To calculate the required indicator, specialists use a certain formula:

The result is the following calculation:

mn = 3.14 × 4.1 × 106/180 = 758 cm.

It should be noted that the step between the points in the corners will be 55 cm.

An illustrative example demonstrates that trusses from a profile pipe are calculated quite simply and quickly.

Calculation example

Training video with calculation rules.

Features of the design of a truss from a profile pipe

The profile pipes from which the trusses are made are durable, and therefore have distinctive characteristics. The features of all designs are divided into several main factors.

The number of belts and the load index are considered critical indicators.

According to these characteristics, farms are divided into:

Configuration type in which all elements are located in the same plane;
A type in which the individual parts of the span are arranged in two or more tiers.

Both design features are stable and can withstand extreme loads, while the angle of inclination can be arbitrary. But to ensure the construction of a longer service life, it is recommended to use the second type. It is more reliable.

Profile pipe trusses are also designed depending on the contours and their shapes. As mentioned earlier, according to the last criterion, structures are divided into single-slope, gable, straight, and also in the form of an arch. Each of the samples is used for different purposes.

For example, products with a parallel belt are ideal for soft roofing. At the same time, the support is quite simple and all its parts are identical. It is the easiest to install, since this process does not require special knowledge.

Single-pitched metal trusses are best suited for fixing rigid roofs at the required height.

W-shaped truss

Types of trusses from a profile pipe

There are many different types of trusses that allow you to implement a wide variety of design solutions.

The first and most common type is the triangular shape of the metal structure. This is a classic type of workpiece, suitable for structures of various kinds. In order to select the optimal cross-section of pipes in such a sample, it is necessary to take into account the characteristics of the further operation of the structure and its nominal weight. Length is also taken into account. The advantage of such products is considered strength, ease of installation and the constant flow of natural light through triangular frames.
The second most popular type is polygonal trusses from a profile pipe. This configuration is indispensable in large rooms. When it comes to designing a large building or shed, polygonal products meet all the requirements. The only drawback of such structures is the difficulty in welding them. Despite the usual angle of inclination, it is necessary to use a certain principle and technique of welding. And this is not suitable for lightweight structures.
In terms of strength characteristics it is not inferior to the previous types and the truss, which has parallel belts... A distinctive feature of such a metal structure is that all rods, gratings and belts are of the same length. It is considered the easiest to calculate.
Also a robust kind of farm - single slope trapezoidal... Such trusses are supported by columns. According to its characteristics of rigidity, this type has no equal.

Farm types

The main structure of the truss from the profile pipe

Experienced professionals can quickly assemble trusses from a profile pipe. For this, it is necessary to give the exact dimensions and drawings of the metal structure. But, if the task is to save the budget for construction, the installation can be done independently. To do this, you need, first of all, to assemble the basic structure.

In order to create it, predominantly rectangular or square metal products are used. They allow the entire workpiece to remain strong throughout its entire service life. In addition to this, the basic structure of the square profile is easier to attach to the base.

At the first stage, using drawings and calculations, all metal parts are welded directly to the farm itself. This is done on the ground or in a prepared room with level floors. The length and width of the product are checked.

This is followed by the stage of installing and fixing the supporting elements located vertically. Their correct installation determines the reliability of the entire metal structure. You can use a plumb line to check. It will show how accurately the supporting supports were fixed.

How to weld trusses from a profile pipe

As soon as the supports are ready, longitudinally located pipes are welded to the posts. They are attached to securely attach the elements. They give stability to the entire structure.

When the base is ready, it is time to attach a truss to it from a profile pipe. The pre-prepared grid configuration is lifted and placed from above. Immediately you need to check the correctness of the assembly, including the braces. All corners should be in place and firmly attached to the base. When all the dimensions and location of the structure have been checked, the metal elements are welded to each other. Do not forget about the potholders.

Connection example

Ultimately, it is necessary to clean out all the joints where the welding machine was used, and carefully paint all parts of the metal structure.

As a result, correct calculations, quality materials and careful welding work create a perfect overlap.

Video explaining the welding process of the structure: