Mon, 20 December 2010
Bridges
Spanning the Globe
Common types of bridges include beam bridges, arch bridges, suspension bridges, cantilever bridges, truss bridges, and cable-stayed bridges.
The Inca civilization
The Inca civilization in South America made use of rope bridges in the Andes Mountains before the Europeans colonized in the 1500’s. These rope bridges spanned canyons and gorges, allowing easy access to otherwise difficult to reach areas. While they were strong and reliable, repairing the bridges was a dangerous job that often ended in death. The Oldest Standing Bridge
The Zhaozhou Bridge is the oldest standing bridge in China and the world’s oldest stone segmental arch bridge. Built in 605 AD, it is still standing strong today, over 1400 years later.
The Industrial Revolution
During the Industrial Revolution of the 19th century wrought iron was introduced into the design of large bridges. Wrought iron was later replaced by steel because it has a higher tensile strength. Go Daddy.com picked us for a Go Daddy campaign. If you go their site and you buy a domain name use the Promo Codes below.
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What Do You Know, Joe?
In 1779, the world's first iron bridge, spanning the Severn River, was completed at what location?
A. Maryland
B. England
C. Ontario
D. Minnesota
Last Posts Answer: A. One Sixth
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