Designing a garage frame from a profile pipe begins with an accurate calculation of the snow load on the farms, since this parameter dictates the choice of section profile and step of installation of racks. If you ignore the regional weight factors of snow, the lightweight structure may not withstand the winter season, which will lead to deformation of the roof or complete collapse. Competent drawing allows you to determine the points of critical stress in advance and strengthen them with additional bends, ensuring the durability of the structure without overspending metal.
Choice profile-pipe as the main material due to high rigidity and ease of installation in comparison with round rolled or wood. A rectangular cross-section makes it easier to dock the elements and fasten the skin, whether it is a flooring or sandwich panels. However, to assemble a reliable garage, it is necessary to clearly understand the difference between load-bearing columns, rafting farms and rigidity bonds, each of which has its place in the overall scheme.
Selection of pipe cross-section and calculation of materials
The first step in creating quality drawing is the definition of the size of the profile pipe for various structural elements. For vertical racks, taking the main weight, usually use a square profile with a cross section of 100×100 mm or 80×80 mm, depending on the height of the ceiling and wind load. Horizontal runs and elements of the farms can be made of a pipe of smaller diameter, for example, 40x40 mm or 60x40 mm, which reduces the total weight of the frame.
Calculation of the amount of metal is carried out taking into account the stock for trimming and welding seams. The standard pipe length is 6 or 12 meters, so waste minimization should be considered when designing the width of the garage. For example, for a garage with a width of 3.5 meters, it is optimal to design a farm with a span multiple of the length of blanks, or provide docking in places of minimal voltage.
⚠️ Note: The use of a pipe with a wall thinner than 2 mm for load-bearing racks of the garage is strictly not recommended, since such metal is subject to rapid corrosion and does not keep welding under load.
When purchasing materials, it is important to pay attention to the brand of steel. For street structures is most often used St3spIt has good weldability and plasticity. Cheaper analogues may contain an excess of impurities, which will make the seams brittle in the cold.
Schemes and drawings of rafting farms
The centerpiece of any garage drawing is a truss farm. It determines the shape of the roof and the ability of the structure to withstand external influences. The most common and effective scheme for spans up to 6 meters is considered a triangular farm with parallel belts or a trapezoidal shape. The lower and upper strings are connected by slanting, which distribute the load along the entire length.
- 🏗️ Triangular farm: ideal for single-sided and gable roofs, provides fast water runoff.
- 🏗️ Trapezoid farm: used for large spans, has high stiffness for bending.
- 🏗️ Parallel belt farm: often used for flat roofs or for mounting floors from a profile sheet.
The drawing must indicate the angles of slope of the slant. The optimal angle is 45 degrees, as it provides a uniform distribution of compression and stretching forces. Changing the angle requires recalculation of the pipe cross-section, since at sharper angles the load on the joints increases.
Step-by-step instruction for assembling the frame
The assembly of the frame begins with the preparation of the site and the installation of embedded parts or the concrete of the supporting heels. After the vertical racks are installed and verified in the level in two planes, you can start installing farms. For ease of installation, farms are often assembled on the ground and then lifted with ready-made nodes using a crane or winch.
☑️ Frame assembly control
Welding of elements should be done in a staggered manner to avoid overheating of the metal at one point and subsequent warping of the structure. First, the elements are grabbed with short seams, geometry is checked, and only then a continuous boiling of the nodes is performed. Particular attention is paid to the places where farms dock with columns, where maximum efforts are concentrated.
After mounting the main skeleton, horizontal connections and runs are welded, which give the frame a spatial rigidity. Without these elements, the garage can “walk” under the gusts of wind. The final stage of rough assembly is the cleaning of welding seams and degreasing of the surface before painting.
Typical dimensions and dimensions of the garage
When choosing the size of the garage, you should start not only from the dimensions of the car, but also from the convenience of service. A standard drawing for a single car usually assumes a width of 3-4 meters and a length of 5-6 meters. This allows you to freely open the doors, pass between the car and the wall, as well as place a workbench or shelving.
| Garage type | Width (m) | Length (m) | Height (m) |
|---|---|---|---|
| Minimum (auto only) | 3.0 | 5.0 | 2.2 |
| Comfort (with passage) | 3.5 - 4.0 | 6.0 | 2.5 |
| Double-seat | 6.0 - 7.0 | 6.0 - 7.0 | 2.5 - 3.0 |
| With the workshop. | 4.0 - 5.0 | 8.0+ | 2.8 |
The height of the gateway also plays an important role. If you plan to install automatic sectional gates, you need to lay a reserve in height of the ceiling. For standard passenger cars, the height of the opening in 2.2-2.3 meters is optimal, for SUVs or minibuses - at least 2.5 meters.
When designing a garage length, add a minimum of 1 meter to the length of the car to organize a tire repair and storage area.
Structural strengthening and wind links
The frame of the profile pipe, despite its strength, requires the correct system of connections for stability. Wind connections are installed in the planes of walls and roof, forming hard disks. Often for this purpose, steel strips or pipes of smaller cross-section, located cross-cross.
Particular attention should be paid to the foundation. The metal frame must be reliably angered into a concrete base. To do this, in the upper part of the foundation when pouring studs or plates are embedded, to which they are subsequently welded or screwed. pole-heel Stands. The lack of a hard connection with the foundation can lead to a hurricane wind overturning the garage.
⚠️ Attention: When welding in the cold (-10 ° C and below), it is necessary to preheat the metal in the seam zone, otherwise microcracks may occur in the structure of the welded joint.
Protecting metal from corrosion
The durability of the garage depends on the quality of anti-corrosion treatment. The profile pipe inside is also prone to rusting, so the ideal option is hot galvanizing of ready-made parts, although at home this is difficult. Most often, multi-stage painting is used.
The first step is the mechanical cleaning of the metal from scale and rust using sandblasting or brushes. The surface is then degreased with a solvent. The grounder is selected with zinc or phosphate compounds, which create a passive layer of protection. The finishing coating should be resistant to ultraviolet light and temperature changes.
Alternative methods of protection
There are special rust converters that can be applied to slightly damaged surfaces, turning iron oxides into a durable protective layer. The use of kuzbasslak is also popular, but it requires careful surface preparation and is not always aesthetic.
Installation of the cladding and gate
After completion of welding and painting of the frame, they proceed to install the skin. For garages from profile pipe, the most popular material is a profiled sheet (profonnament) with a polymer coating. It is attached to roof runs and walls with roof screws with rubber washers that prevent moisture from entering.
The gate can be made in the form of a swinging frame from the same profile pipe, sheathed with a profile sheet, or be ordered separately as a sectional or roller design. When installing heavy gate groups, it is necessary to provide additional strengthening of the end columns of the frame to avoid distortion of the opening over time.
⚠️ Note: Do not use electric welding for fastening of the proflagging floor, as this will damage the polymer coating and will lead to rapid rotting of the sheet around the fastening point.
The quality of the frame assembly determines the geometry of the entire garage: distortions at the stage of welding farms are almost impossible to correct after mounting the skin.
The final chord of construction is the sealing of joints and the installation of a drainage system. Properly designed and assembled frame from profile pipe will last decades, requiring only periodic renewal of the paint coating.
Frequently Asked Questions (FAQ)
Which foundation is better for a framed pipe garage?
The optimal solution is a monolithic concrete slab 10-15 cm thick with reinforcement, which simultaneously serves as a floor. For lighter options, a columnar foundation with a roastwerk or screw piles are also suitable, especially on hollow soils.
Do I need to be insulated if the garage is made of metal?
The metal frame itself does not hold heat and is subject to condensation. If the garage is planned to be used as a workshop all year round, insulation is necessary. It is best to use sandwich panels or mineral wool with mandatory vapor insulation to avoid condensation inside the structure.
Can I build a garage without welding, only on bolts?
Yes, there are technologies of bolt connection using shaped elements. This simplifies delivery and installation, but requires more accurate factory preparation of the holes and regular check of tightening of the bolts, since the metal has the property of "walking" at temperature expansions.
How to calculate the angle of the roof for the flooring?
For the flooring, the minimum angle of inclination is 8-12 degrees, but for regions with a lot of snow it is recommended to make a slope of at least 20-30 degrees so that the snow cap can go off on its own under the influence of gravity.