One of the most important types of transport is the railway. And the construction of roads is an important part of the development of each country. A railroad is a system of sleepers and rails that create what is called a railroad track. Road construction begins with the development of the project and the selection of materials for the upper structure of the railway tracks, which are supplied by metaltransmarket .
It is not a monolithic device and consists of an upper and a lower part. The bottom is the ground holding the rails and sleepers. Rails go on top, and steel beams and sleepers come to the aid of the beams. The track gauge between steel rails is strictly fixed in GOSTs and SNiPs in size. It is it that corresponds to the distance between the wheels of the train, but sometimes it can change, as a result, there are narrow-gauge and wide-gauge roads. Again, this depends on local regulations.
The main factor determining the choice of the type of rail for railway tracks is axle load and travel speed. Intermediate rail fasteners are used to attach the rails to the sleepers, and butt fasteners are used to connect the rails to each other. Intermediate fasteners include pads, crutches or screws; to butt joints - pads, bolts, nuts and washers.
All social and economic factors are taken into account, as well as the importance of laying branches in this particular area. All kinds of studies are being carried out, both geological and topographic. As soon as all the specialists permit the construction, the laying of the iron sheet begins immediately. In addition to such an embankment, this includes structures erected by artificial means, holding paths in places of ruptures of the earth's surface - rivers, ravines, streams. Of course, these are bridges, various tunnels, viaducts and so on.
