| CLICK HERE FOR INDEX PAGE |
| |
| THE BOX GIRDER BRIDGE |
V.Ryan © 2024 |
| |
A Box Girder Bridge is basically a hollow, long box, composed of several sections, manufactured from reinforced, prestressed concrete. The sectional front elevation (below), shows the hollow box, with interior webs that strengthen it. The box girder sections are manufactured in a factory and transported to the construction site, where they are assembled forming the bridge.
This type of bridge can be very long, made up of several box girder sections, bolted together. They are ideal for motorway flyovers and even pedestrian walkways.
They have a modernist appearance, ensuring that they fit in with urban architecture. They have a reputation of requiring little maintenance and are therefore, a cost effective alternative to other types of bridges. |
| |
 |
| |
| During construction, the box girder sections are lowered in position by a crane. The crane is moved the distance equal to a section at a time, along rail tracks. On longer bridges, two cranes work from either side of the bridge, until the bridge meets in the middle and the last section is lowered in place. |
| |
 |
| |
 |
| |
| CONSTRUCTION |
| Reinforced concrete is a composite material, a combination of concrete and steel reinforcements, in the form of a mesh. This combination of materials produces a very strong structure, capable of resisting high loads / weights, due to its ability to absorb and distribute forces. Click here for link to page on Reinforced Concrete. |
| |
 |
| |
| FAMOUS BOX GIRDER BRIDGES |
| |
Oresund Bridge - 2000 - Denmark / Sweden.
Confederation Bridge - 1997 - Canada
Rio-Niterói Bridge - 1974 - Brazil
Bang Na Expressway - 2000 - Thailand
General Douglas MacArthur Causeway - updated 1990s - Miami, USA |
| |
| |
| CLICK HERE FOR TECHNICAL DRAWING INDEX PAGE |
| |
|
| |
|