Grady Hillhouse of Practical Engineering explained the general style and design of every type of bridge over the course of 15 minutes. He looks at the different types of trestle bridges ...

We see different examples of the materials used to make bridges, including stone, cast iron, brick and steel. Using plastic is a good idea; it is light, easy to build from, doesn’t need cranes ...

We see different examples of the materials used to make bridges, including stone, cast iron, brick and steel. Using plastic is a good idea; it is light, easy to build from, doesn’t need cranes ...