What is the beam?

Girder is a term used in the design to indicate a supporting horizontal beam that can be made of various building materials such as stainless steel, concrete or a combination of these materials. The nose bridge is a basic, common type of bridge, where the bridge deck is built on top of such support rays, which were in turn placed on pier and abutments that support the bridge span. The types of beams used for beam bridges are usually either i-spy beams, so-called, because their shape resembles the main Roman letters I, or box beams that are made of steel or concrete and shaped as an open box. Bridges beams are most commonly used for direct bridges, which are 33-650 feet long (10-200 m), such as light rail bridges, pedestrian overdars or highway flights. The longest beam in the world is 2,300 feet long and is located in Brazil.

There are four types of beams, classified depending on the building material and the type of beams used. RollThe steel beam is built using i-spars made of prefabricated steel, while the plate beam is made by welding flat pieces of steel together in place to form i-rays. The concrete bridges of the beams are designed using concrete I-Pephorsko beams, which can be made of different types of reinforced concrete, including pre-concrete and on tensioning concrete. The box beam can be made of steel or concrete and uses box beams to support the bridge deck.

Whether I-play or box beam beam beams are used for the construction of the support bridge depends on different factors. It is easier and cheaper to build and keep the beam using i-Pephorsko beams. However, these beams do not always offer sufficient structural strength and stability, if the bridge is very long or the bridge span is curved because they are sensitive to Twt forces or torque, such a span is subject. Box beams are preferred for such bridges. There were concerns about the corrosion of beams, especiallyIf rainwater penetrates into the open space inside the beams.

Nose bridges belong to the category of bridges called beam bridges. This category of bridges includes bridges of support bridges, trusses and bridges punishment. The beam bridges can be designed using a wide range of materials including stone, wood, steel, iron and concrete. An example of the basic type of beam bridge is a protocol or a plate of stones laid through a stream.