What is the design of tower bridge like?

Tower Bridge is a combined bascule and suspension bridge in London, built between 1886 and 1894. The bridge crosses the River Thames between the Tower of London and Southwark. It is a Grade I listed building. The bridge consists of two towers, which are connected by two horizontal walkways and a central roadway. The towers are made of granite and are 65 metres high. The walkways are made of steel and are 43 metres long. The central roadway is also made of steel and is 100 metres long.

The bascule leaves of the bridge are made of steel and weigh 1,200 tons each. They are raised and lowered by hydraulic power. When the leaves are raised, the bridge opens to allow ships to pass through.

The suspension spans of the bridge are made of steel and are 87 metres long. They are supported by cables that are attached to the tops of the towers.

Tower Bridge is a iconic landmark of London and is one of the most popular tourist destinations in the city. It is a symbol of Victorian engineering and is a testament to the ingenuity of the engineers who designed it.