Bridges
Bridges
Many of the great landmark bridges are built from steel. It is important to note that steel bridges aren’t just attractive, but also are stronger, safer, faster to build, require less maintenance, and are more flexible, which makes them perfect for earthquake-prone and high-wind sites. Steel is also used to protect elements on these bridges like it’s utility infrastructure.
In addition to this, environmentalists are more likely to support the construction of steel bridges compared to traditional methods because they’re generally more sustainable and earth-friendly altogether.
Bridge Ideation
Once the function of a bridge is determined, the engineer selects the form of the bridge to satisfy the given function—hence the motto “form follows function.” However, before establishing the form of the bridge, the engineer must understand what material is available for the construction of the bridge.
Advantages
Economic Benefits | Enironmental Benefits | Societal Benefits |
| Lower construction costs compared with other materials helps save money for municipal governments. | The ability to recycle and reuse steel bridge components reduces environmental impact. | Steel bridges are generally safer to build and less likely to fail. |
| Faster construction reduces traffic and business disruption. | Steel produced in controlled manufacturing environments limits waste. | Steel structures can be visually lighter and more attractive than other bridge types. |
| Steel bridges last longer than other types, which means they don’t have to be replaced as quickly. | Steel is highly adaptable to different climates and geographic conditions. | In certain conditions, a bridge made of steel is the only option to connect two areas. |
| Steel components require less maintenance and don’t need to be replaced as often. | The relative lightness of steel compared with other materials reduces energy use during delivery and construction. | Steel components are less likely to be damaged during extreme events like hurricanes and earthquakes. |
| The lighter weight of steel means smaller, less costly equipment — including lifts — can be used on construction sites. | Steel allows longer spans to be built, which limits impact on habitats below. | Steel components are used to transmit critical utility services across bridges. |
Types of Bridges
Beam Bridges
Box Girder Bridges
Truss Bridges
Arch Bridges
Cable-Stayed Bridges
