Grace Zhang: EXP3 Week2

a.Perspectives(one point + two points)

1.One Point Perspectives Two Points Perspectives

2.One Point Perspectives Two Points Perspectives

b.Some unique bridges

1.Tower Bridge (England)

Built in 1894 by Wolfe Barry and Horace Jones. Tower Bridge is one of the famous land marks in London and one of the most beautiful in the world. This 800 foot long bridge has a space 28 feet when closed but opens in the center until it reaches 140 feet which allows ships to sail. Tower Bridge using the 432 workers and built in eight years. At that time they sank 70,000 tons of concrete into the two large piers, placing two supporting structure into place, each of them weighs 1000 tons and decorate the whole bridge with Portland stone and Cornish granite to cover 11000 tons of steel.

2.Ponte Vecchio (Italy)

Ponte Vecchio in Florence is one of the famous tourist attractions in Italy, and considered as the oldest stone arch bridge in Europe. Actually this bridge is built of wood until it was destroyed by floods in 1333, and 12 years later, the bridge was rebuilt using stone. Famous for its shops on the bridge. The bridge is full of shops, starting from the traders and butchers of the Middle Ages until the gift shop and art sellers.

3.Gateshead Millennium Bridge(England)

The bridge takes as little as 4.5 minutes to rotate through the full 40° from closed to open, depending on wind speed. Its appearance during this manoeuvre has led to it being nicknamed the "Blinking Eye Bridge".

4.The rolling bridge(England)

The bridge consists of eight triangular sections hinged at the walkway level and connected above by two-part links that can be collapsed towards the deck by hydraulic cylinders, which are concealed in vertical posts in the bridge parapets. When extended, it resembles a conventional steel and timber footbridge, and is 12 metres long. To allow the passage of boats, the hydraulic pistons are activated and the bridge curls up until its two ends join, to form an octagonal shape measuring one half of the waterway's width at that point.