Thanks to bridges, rivers and lakes will not interrupt a journey. People build bridges to make it easier to cross rough land or water. There are thousands of bridges in the world, but only five basic kinds: beam, arch, suspension, cantilever, and cable-stayed bridges.
Do you think bridges could be made out of glass? Inventors are working on this idea now. Concrete used in bridges is worn down by salt, ice, and wind. The steel used to make the concrete stronger often rusts. But a special glass called fibreglass is very strong. When glass fibres are held together by a type of “glue” ice, and wind. The steel used to make the concrete stronger often rusts. But a special glass called fibreglass is very strong. When glass fibres are held together by a type of “glue” called resin, they become stronger than steel or concrete. Fibreglass is also lightweight and can be easily shaped.
Beam bridge: This can be made of wood, steel, or concrete.
Arch bridge: A beam bridge can break easily in the middle. But a curving arch helps to carry the load on the bridge.
Suspension bridge: The roadway is suspended, or hung, from long steel cables. This type of bridge can be much longer than other types.
Cantilever bridge: One or more independent beams joined by a centre span make a cantilever bridge.
Cable-stayed bridge: This is one of the newest kinds of bridge designs. It takes less concrete or steel than a beam bridge. And it fits across narrow rivers better than a suspension bridge.
Picture Credit : Google