Bridges

BY: Carina, Mari, Dominic, Renzo, Paco and Razak

This is a video of how to make a strong bridge!

Hope you enjoy it! :)

• span (simple, continues cantilever),
• material (stone, concrete metal etc.)
• placement of the travel surface in relation to the structure (deck, pony through),
• form (beam, arch truss etc.),

The four main factors are used in describing a bridge. By combining these terms one may give a general description of most bridge types.

found from:en.wikipidia.org

Bridge Basics

Quiz!!!

Have you been listening?

What are the Most Famous Bridges?

2.Sydney Harbor Bridge

1.Golden Gate Bridge

The Sydney Harbor Bridge opened in 1932 and connects the Sydney central business district and the North Shore. The bridge, along with the nearby Sydney Opera House, is an icon of the Sidney skyline. Because of it’s arch shape design the bridge has become known as “The Coathanger”.

It is a suspension bridge that spans the Golden Gate, the area where the San Francisco Bay opens into the Pacific Ocean. It has been declared one of the modern Wonders of the World by the American Society of Civil Engineers. Construction began in 1933 and concluded in 1937

4.Langkawai Sky Bridge

3.Tower Bridge

Located at the peak of Gunung Mat Chinchang in Malaysia, Langkawi Sky Bridge is a 400 foot (only six feet wide) curved pedestrian bridge. It opened in 2005 for tourists who want amazing views of the Langkawi islands and the Andaman Sea. It sits 2,000 feet above sea level and is accessible by the Langkawi Cable Car, which is about a 15 minute ride.

An iconic symbol of London, the Tower Bridge crosses the River Thames near the Tower of London. The bridge is 800 feet long and was finnaly completed in 1894.

found from:www.okeanosgroup.com

1) What is the nickname of the Tacoma Narrows Bridge?

BY: Carina, Mari, Dominic, Renzo, Paco and Razak.

Thank You For Listening!!! :)

www.ehow.com

There are 2 types of force called tension and compression. They are both help when weight is on a bridge. Compression pushes the weights down and tightens it. Tension stretches the bridge.

How to make a paper bridge strong?

Here are some pictures of bridges!

found from:www.ask.com

There are different types of bridges that are used, and the strength of a bridge depends on several of factors, such as intended purpose, span and materials used. Suspension bridges are one of the strongest types of bridges. They usually maintain extreme strength even when spanning out several kilometres, making them the best for crossing over large water bodies.

What is the strongest type of bridge?

2) What is the most famous bridge in the United States? Hint: It's in San Francisco

This is our bridge!

found from:en.wikipedia.org

Tacoma Narrows bridge disaster

Tacoma's Narrows bridge collapsed on November 7 1940 at approximately 11:00 AM. Tacoma Narrows bridge's nickname was Galloping Gertie. Construction on the bridge began in September 1938. From the time the deck was built, it began to move vertically in the windy weather, which led to construction workers giving the bridge nickname Galloping Gertie. The movement was kept an eye on even when the bridge opened to the public. Several improvements aimed at stopping the movement although they were ineffective, and the bridge's main span finally collapsed under a 40-mile-per-hour (64 km/h) wind conditions in the morning of November 7, 1940.

When/ how did the Tacoma narrows bridge collapse?

3)What are the 2 forces that help old a bridge?

(It doesn't mean you can build a stabled bridge with just wood) The other material are also useful

What is the strongest shape for a bridge?

Triangle because most structures are built with triangle

When it comes to designing a bridge,the strongest shape to use in construction is the triangle. Triangles are the strongest shape to use because they allow the weight to be distrubuted evenly throughout the structure of the bridge.

What is the most useful shape for a bridge?

found from: www.ask.com