- Project plans
- Project activities
- Legislation and standards
- Industry context
Last edited 01 Apr 2020
Bridges are a common feature of the built environment and one of the key elements of civil engineering. The basic principles of bridge design are dependent on the nature of the spanning structure; its shape, materials, means of support, distance spanned, terrain, function, budget, exposure and so on.
The three basic types of bridge structure are:
Other definitions related to bridges include:
- A green bridge - a crossing that allows the safe passage of wildlife.
- An overbridge - a bridge crossing over a transport corridor.
- An underbridge - a bridge crossing under a transport corridor such as a railway.
- A viaduct - a bridge like structure composed of a series of spans, used to carry roads and railways across valleys and other depressions.
- A half through bridge - a bridge in which the lower chord carries the vehicular or pedestrian traffic.
- A through bridge - a bridge in which the lower chord carries the vehicular or pedestrian traffic and having cross-bracing located above the traffic.’ Ref Iron and Steel bridges: condition appraisal and remedial treatment, published by CIRIA in 2008.
- The span of a bridge is the horizontal distance between its supports.
- The underside of a bridge is described as a 'soffit'.
- The surface of a bridge which allows passage is describes as a 'deck'.
- 3D printed bridge.
- Assessing bridges.
- Garden bridge.
- Genoa bridge collapse.
- Learning from the Genoa bridge collapse.
- Queensferry Crossing.
- Optimal arch bridge.
- The Iron Bridge.
- The Millau Viaduct.
 Related articles on Designing Buildings Wiki
Featured articles and news
Robotics and the construction industry.
ECA comments on CLC's three-phase recovery plan.
Their diplomatic and architectural history.
The origins of the six volume series.
Built to defend British waters, only to serve as pirate radio stations later.
Wellbeing to influence mix of home and office based working.
An introduction to cobotics.
Survey reports on outlook for the engineering sector.
A simple path to possible error avoidance.
Construction + technology = ConTech.
New low and high tech tools enter the marketplace.
Report looks at mental health in the built environment.
Radiant wall heating method to control rising damp.
What future infrastructure provision might look like.
Highlighting the health benefits of home improvement.
Pavilions for music, entertainment, and leisure. Book review.