A metal girder is a structural element of a building in the form of a horizontal beam. It relies on columns, other elements and beams to support the roof of the building. It is an important part of the supporting structure, since it creates a support for covering the roof and helps to fix it on the surface of the frame.
Item Features
The metal run, depending on the type, can be solid or lattice type. The second option is used more often, because it costs less and installs faster. As for the design of the roof, several elements stand out here. This ridge run, the sides and the Mauerlat. These types of metal girders can be found in almost all roofs.
The ridge run is a support for the top of the roof, the side elements help create protection for different sides of the roof. Mauerlat is located near the base of the rafters, and its function is to lay along the perimeter of the outer wall.
The advantages of metal run
Positive factors such as high strength stand out. If we compare the elements of wood, concrete and steel, then the latter will be much more durable and durable than others. The metal does not require additional treatment with protective equipment, it is not afraid of moisture or mechanical pressure.
In addition, metal girders can be used for any type of coating, as they are universal in terms of fixing. To enhance the protection of the metal can use anti-corrosion mixtures that protect against the appearance of rust.
Due to its low mass, the element shows high endurance, which makes it attractive in the market of goods. Metal runs can be used for buildings with any type of foundation, because they do not create overload, but at the same time provide the desired strength.
Installation speed also refers to the benefits of metal products. Metal girders for the roof can be mounted in a matter of hours, moreover, they are easy to fix on any surface. The main thing here is to choose reliable fasteners that can withstand heavy weight.
Types of Parts
A continuous run is considered strong and reliable, quite effective in terms of use and durable. A channel or an I-beam can be used for it. The material in terms of work is also quite simple. It is necessary to cut it into pieces of the required dimensions and cover it with a mixture of corrosion and corrosion by rust.
Further, marks are made in the right places and holes are drilled for installation. This is the most durable option for fixing and creating a metal beam for the roof.
Curved elements are a modern option. They have a specific shape, which simplifies the installation process. For the manufacture of parts, a galvanized profile is used, which goes through the formation process on special machines. The universality of the obtained part is that it can be used both as a profile and as a crossbar.
The weight of the run is small, it can be mounted independently and without assistance. Fasteners with additional clips are also made of galvanized profile. Their use significantly simplifies the work and speeds it up.
Lattice run is also popular. It is welded from a profile pipe or a special corner. Dense jumpers and braces are used to connect the two crossbars, which add power to the structure and increase its reliability. Even with a small weight, a sufficiently strong element can be obtained.
Types of connection
The fastening of corrugated board to metal girders can be carried out using various options, from ordinary nails to special rivets.
As for convenience, the craftsmen distinguish self-tapping screws and rivets. The first option does not require the creation of holes; also, if necessary, the self-tapping screw can be unscrewed and attached to another section. No need special tools to work.
For rivets, it is necessary to prepare the surface, having previously made holes there. For accuracy in applying holes, you need to attach a professional sheet to them to make the necessary marks. Removing rivets is problematic and large holes and even damage to the profiled sheet can occur in the process. Reuse of rivets, unlike self-tapping screws, is impossible. Therefore, the fastening of the profiled sheet to metal girders is best done using self-tapping screws.
Proper mount
This item depends on many items. Firstly, from fixing the profiled sheet on the surface. This can be done both vertically and horizontally. On the lower and upper edges, fastening is done on each wave, in other places - through the wave, it depends on the place of application.
Secondly, if installation is carried out for a fence, then the first fixation should be done 8-10 cm from the ground. Thirdly, in the process of attaching corrugated board to metal girders, it is necessary to remove chips from the surface, which can lead to corrosion and destruction of the metal.
Expert Advice
Before starting work, make notes on the surface if rivets are used for fastening. This will help not to make a mistake during the installation process and make holes in the right places.
It is necessary to take care of the run and, if necessary, cover the metal with a protective mixture. The use of metal runs for roofing involves the application of several layers of protective material so that the corrosion stage does not begin. Masters advise using solid runs for the foundation, which have greater endurance and durability.