Glossary of technology and equipment for "bridge structure"

A bridge is a structure that crosses rivers, valleys, straits, etc., and builds a road to the opposite bank, and is also called a bridge.
Structures where roads cannot be built on the ground as they cross and run in parallel with towns and general national roads are called viaducts.

Main line bridge Really

A bridge for the main line of a Expressway to cross over rivers, valleys, straits, etc.
Expressway bridges are roughly classified into "concrete bridges" made of concrete and "steel bridges" made of steel.

Overpass Children today (Straddling Expressway bridge), over the bridge, OV

A generic term for bridges for roads, waterways, and railways that cross over Expressway. (The official name is straddling Expressway bridge). Also called OV.

Falling object prevention fence Lucky butts

A steel mesh fence that can be attached to the top of a bridge. It is installed to prevent the dropping of cargo and the like in the event of an accident, or to prevent throwing.
It is also installed in parts that cross railways and major roads (national roads and main roads), and also overpasses that cross Expressway.

Telescopic device Shinshu ,Joint

Bridge girders expand and contract due to temperature changes in steel girders and concrete dryness in addition to this in concrete girders. For this reason, joints that support expansion and contraction of girders are required at the girder ends of bridges or at the crossing parts of bridges. This joint is generically called an expansion device (joint). Since it will be directly impacted by the running of the car, it will be easily damaged and will be a step easily. In order to drive Expressway comfortably, it is an important point to eliminate the step of the expansion and contraction device so that it can run smoothly.

Steel bridge Today , Metal bridge

Steel has been used for general long-span bridges because it is lighter in weight and stronger than concrete. In addition, steel bridges have been used for long-span bridges because the materials can be divided and transported and can be easily integrated by connecting them with bolts on site, and it is easy to meet various local construction conditions.

Concrete bridge

Concrete bridges, which are heavier than steel bridges, have been used for short span bridges.
However, advances in prestressed concrete technology have enabled long span bridges.

Pier Today , Peer

The legs that support the bridge.
It is one of the substructures of the bridge and is a structural part that is located in the middle of the bridge with two or more spans and transfers the load of the superstructure to the supporting ground.