Own storage space for a car is not just a roof over your head for a car, but the need to extend the life of the body and protect the vehicle from aggressive weather conditions. Build profile-pipe With their own hands - this is one of the most rational solutions for private home ownership, as the metal frame is characterized by high strength, durability and relatively low cost of materials compared to a capital brick structure.
Unlike complex concrete structures, the assembly of a metal frame resembles a constructor, where the accuracy of drawings and the quality of welds play a crucial role. You won’t need to hire heavy construction equipment if you plan the work stages correctly and prepare all the elements in advance. The main advantage of this design is the speed of construction: with experience and an assistant, the main skeleton of the building can be assembled in a few days.
However, despite the apparent simplicity, the project requires careful engineering training, especially in terms of calculating snow and wind loads, which can be critical for light metal structures. In this article, we will discuss how to create a reliable shell-bar or a full-fledged hangar, which pipes to choose for racks and runs, and how to avoid common errors in the design of connection nodes.
Selection of material and calculation of the load on the frame
The first and most important step is the choice of the section of the profile pipe, since it is on this parameter that the stability of the entire structure depends. For vertical racks that take on the main load, the best choice will be a pipe cross-section 100x100 mm or 80x80 mm with a wall thickness of at least 4 mm. The use of a thinner metal can lead to the deformation of the frame under the weight of snow in winter or with strong gusts of wind.
For horizontal elements - roof trusses and runs - you can use a smaller section profile, for example, 60x60 mm or 50x50 mm. The crate under the roofing material is most often made from the pipe 40x20 mm or 40x40 mmThis allows to ensure sufficient rigidity for fastening of the flooring or metal roofing without excessive weighting of the structure.
⚠️ Warning: Never use a pipe with damaged geometry or severe corrosion for bearing racks. Even if the defect seems insignificant, under load it is in this place that the destruction of the node can begin.
When calculating the amount of material, it is necessary to take into account not only the perimeter of the future garage, but also the overlap, trimming and technological losses, which are about 10-15% when cutting metal. If you plan to make a swing type gate, then they will need a pipe of the same cross section as for the racks to ensure the stiffness of the flaps and prevent them from sagging over time.
Design and construction of drawings
Without a well-designed drawing, construction turns into a chaotic connection of pipes, which inevitably leads to overconsumption of materials and violation of geometry. All dimensions, including the height of the skate, the angle of slopes and the distance between vertical pillars, must be clearly marked on the diagram. The standard step of columns for a garage with a width of up to 6 meters is usually 2.5-3 meters, which allows you to effectively distribute the load.
Particular attention should be paid to the nodes of the connection of the roof farms. It is here that errors most often occur, leading to leaks or deformation of the roof. Farms can be made in the form of a triangle or trapezoid, using slanting from a smaller diameter pipe to impart rigidity. All dimensions must be transferred to paper or computer program with millimeter accuracy.
| Element of construction | Recommended tube cross section (mm) | Wall thickness (mm) | Step of installation (m) |
|---|---|---|---|
| Vertical struts | 100x100/80x80 | 4.0 | 2.5 - 3.0 |
| Roof farms (belt) | 60x60/50x50 | 3.0 - 4.0 | Project |
| Runs and slants | 50x50/40x40 | 2.5 - 3.0 | 1.0 - 1.5 |
| Roofing crate | 40x20 | 2.0 | 0.5 - 0.7 |
If you do not have the skills of engineering design, it is advisable to use ready-made standard solutions, adapting them to their size. Garage drawings Not only should the front and side views be included, but the top plan should be ground-bound to accurately calculate the amount of concrete needed for the foundation.
Why is the angle of the roof important?
The angle of inclination directly affects the snow load. For regions with heavy snowfall, it is recommended to do a stingray of at least 20-25 degrees so that the snow rolls on its own without putting critical pressure on farms.
Foundation device for metal frame
Although a garage made of profile pipe is a relatively lightweight construction, having a reliable base is necessary to prevent distortions and displacements. The most common and economical option is a belt shallowly-deep foundation, which evenly distributes the weight of the building around the perimeter. The depth of the trench is usually 40-50 cm, depending on the type of soil and the depth of freezing in your area.
In the process of pouring concrete, it is critically important to correctly install anchor bolts or embedded parts, to which the frame racks will subsequently be welded or screwed. If you miss this moment, you will have to use chemical anchors or drill hardened concrete, which will greatly complicate the installation and reduce the reliability of the mounting.
- 🏗️ Dig a trench around the perimeter and install a formwork that rises 15-20 cm above the ground to create a cap.
- ⛓️ Tie the reinforcement frame of rods with a diameter of 10-12 mm, providing a protective layer of concrete on all sides.
- 🔩 Lock anchor bolts in the corners and middle of the sides, checking their verticality and exact compliance with the drawing.
- 🧱 Pour the trench with concrete of a brand not lower than the M200, carefully vibrating the mixture to remove air bubbles.
After pouring, the foundation takes time to gain strength, usually taking 7 to 28 days depending on weather conditions. During this period, it is not recommended to load the base or start mounting metal structures, as premature loading can lead to cracks.
To accelerate the process and reduce heat loss through the floor, a layer of ceramzite or sand can be filled inside the perimeter of the belt foundation, and then pour a concrete screed 10-15 cm thick with a grid reinforcement.
Frame assembly and welding
The assembly of the frame begins with the installation of vertical pillars, which are installed on the prepared anchor foundation. Before the final fixation, it is necessary to check the verticality of each column using the construction level or plumb, since even a slight skew during the installation stage will lead to problems when installing the roof and gate.
The connection of the elements of the frame is carried out by the method of electric arc welding. The seams should be solid and high-quality, without burns and non-provars, especially in nodes experiencing maximum tension. After welding, all seams must be cleaned with a Bulgarian and treated with an anti-corrosion composition to prevent the development of rust in places of thermal exposure.
⚠️ Attention: When welded in hot weather, the metal expands, and when cooled, it shrinks, which can cause the frame to deform. Try to carry out basic welding work in the morning or evening hours, when the air temperature is stable.
After installing racks and binder belts at the floor and roof level, start the installation of farms. Farms gather on the ground and then climb and weld to the racks. To lift heavy structures with a height of more than 3 meters, you may need the help of equipment or the use of winches and temporary stops.
☑️ Welding quality check
Installation of roofs and wall covering
The choice of roofing material for a garage from a profile pipe is often reduced to a flooring or metal roofing, as they are light, durable and easy to install. The crate under the roof is made from a profile pipe 40x20 mmThe slab laid in a step corresponding to the manufacturer's recommendations of the chosen coating, usually it is 50-70 cm.
Mounting of roof sheets is carried out using special roof screws with EPDM-layers, which ensure tightness of the connection. It is important not to pull screws, so as not to damage the rubber washer, but also not to leave them weak, otherwise moisture will begin to accumulate at the place of attachment.
For wall paneling, you can use the same flooring, sandwich panels or a profile with insulation. If the garage is unheated, it is enough to sheath the frame with a profile sheet outside, leaving the interior space free. If necessary, insulation, between the racks of the frame is laid mineral wool or foam, which is then sewn up with OSB sheets or a tram.
The best solution for year-round use is a combination of profnational flooring outside and insulated sandwich panels inside, which creates the thermos effect and retains heat.
Installation of the gate and finishing
Gates for garage from profile pipes are most often made swinging, as this is the simplest and most reliable design, which is easy to make yourself. The frame of the gate is boiled from a pipe of the same cross section as the main racks, with mandatory reinforcement with diagonal slanting to prevent sagging of the flaps.
The hinges are welded to the gate frame and to the frame racks, taking into account technological gaps for free opening. After installing the flaps and locks, the entire metal frame of the garage must be primed and painted with weatherproof paint in 2-3 layers. This will protect the metal from corrosion and give the structure an aesthetic appearance.
The final stage can be the device of a window around the garage to divert water from the foundation and supply electricity for lighting and sockets. Properly assembled and processed profile-pipe It will last for decades, requiring only periodic renewal of the paint coating.
- 🎨 Cover the metal with a primer over rust before painting for better adhesion.
- 🔦 Set a motion sensor or timer to automatically turn on the lights.
- 🚪 Lubricate the gate hinges with graphite lubricant for silent operation in winter.
Frequently Asked Questions (FAQ)
What is the best foundation to choose for a garage on thick soils?
For pulpy soils that are strongly frozen and swell in winter, it is best to fit a pile-screw foundation or a buried monolithic plate. The ribbon foundation in such conditions can deform, if not laid below the depth of freezing.
Do I need to insulate the walls of the garage from a profile pipe?
If you plan to use the garage only to store the car in the warm season, insulation is not necessary. However, for comfortable work in winter or to prevent the formation of condensation (which causes corrosion of the car), insulation of the walls and roof is extremely desirable.
How to calculate the amount of snow on the roof of the garage?
The calculation is made according to the SNiP "loads and impacts" for your climatic region. For the middle strip of Russia snow load can range from 120 to 180 kg per square meter, which must be taken into account when choosing a cross-section of farms.
Can I build a garage without welding using only bolts?
Yes, there are bolt-connection technologies using shaped elements, but such a garage will be less rigid and require more accurate factory preparation of the holes. For DIY projects, welding remains the most reliable and affordable method.