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Bridges and Tunnels
A bridge is a link between two places, such as over a river, a road or a depression, that caters to pedestrians and/or vehicles. A tunnel is an underground link between two places, often underneath a riverbed, for pedestrians and/or vehicles.
4,393 Questions
Why is a natural stone beam bridge strong?
Yes, but the bridge depends on its age. The older it is, the weaker the bridge is. The younger it is, the STRONGER the bridge is.
What is the best shape to use for a bridge?
triangle
ANS 2 - There is no 'best shape' - each bridge is designed for a particular place and can be almost any kind of construction.
Is the Tappan Zee bridge in the Hudson Valley?
Yes, it is north of the George Washington Bridge ( N. Jersey to Upper Manhattan via Interstate 95)and south of the Bear Mountain Bridge (Southern Orange County to Upper Westchester County via Routes 6 and 202) The "Tap" connects Rockland county to Westchester county via Routes 87 and 287.
How are beam and suspension bridges alike?
A suspension bridge deck is suspended from above on a catenary cable between two fixed points. The Golden Gate Bridge is a suspension bridge. Using suspension techniques, great spans with minimum obstruction under can be created. A beam or truss (reinforced beam) bridge deck is supported from underneath on a construction of beams or arches (bent beams). longer, stronger spans favour the beam truss method of construction, especially where wind generated sway is an issue. The Sydney Harbour Bridge is a Beam/Truss bridge.
Did thomas telford build the iron bridge?
The Iron Bridge near Telford in Shropshire, England, was designed by Thomas Farnolls Pritchard, and it was built by Abraham Darby III.
What is the total length of the mackinac bridge?
The total length of the Mackinack Bridge is just a fraction under 5 miles.
Why did the engineers choose to build the new river gorge bridge?
For safety and ease of commute. Reid Schumacher, Elk River, MN
Who invented the first bridge made?
The first bridges were made by nature. It would usually be a fallen tree or log.
What city has the most bridges in the UK?
Depends on exactly what you call a bridge (footbridge, bikes, cars, trains?) but Hamburg Germany is reported to have over 2,300 bridges. Amsterdam also has more than 1000. Venice Italy has several hundred.
What was the purpose of the Pont de Quebec bridge?
The purpose of the George Washington Bridge was to make it easier to travel between New Jersey and New York City.
The Holland Tunnel opened in 1927, while the George Washington Bridge opened in 1931. Before the Holland Tunnel and GWB were built, there was no way to travel across the Hudson River between New Jersey and New York, except by boat.
Traveling across the Hudson River by boat was inconvenient enough, but it became doubly inconvenient when automobiles became popular. Before the 1920s, nobody had cars except the rich. But as the 1920s progressed, the price of an automobile went down, and average people were able to buy cars, too.
But you couldn't take your car across the river by boat. So, it became necessary to build the Holland Tunnel and the GWB (and the Lincoln Tunnel, which opened several years after the GWB), so people could drive across the Hudson River.
Why did the west gate bridge fall down?
The Golden Gate is the entrance into San Francisco harbor. It got its name from the orange-gold rocks that it is composed of. It has never failed.
A bridge was later built across the bay at the Golden Gate, so of course, that bridge was named, "Golden Gate Bridge". It has never failed, either.
The Tacoma Narrows Bridge failed, though, due to strong wind making it swing faster and faster (Aeroelastic flutter) until it broke into pieces. This bridge was a suspension bridge with towers, similar to the Golden Gate Bridge. This bridge was designed by the same Engineer as the Golden Gate Bridge.
When the Tacoma Narrows Bridge came down, the authorities in San Francisco undertook a quick project to brace each end of the Golden Gate Bridge to keep it from fluttering in the wind.
How many lanes does the Sydney Harbour Bridge have?
The Sydney Harbour Bridge carries eight lanes of vehicular traffic. There are also two train lines, a pedestrian footpath and a cycleway. The width of the bridge is almost 49 metres.
What is toll on Williamsburg bridge?
No. The Brooklyn, Manhattan and Williamsburg Bridges are toll-free.
How high is the roadway on the Chesapeake Bay Bridge?
The Chesapeake Bay Bridge is 38 feet wide on the on the westbound side and 28 feet wide on the eastbound side. The westbound side has one reversible lane.
How many bridges are there in the us?
According to the 2006 Bridge Inventory issued by "Better Roads", there are close to 600,000 bridges in the US. This includes all bridges of 20 foot or greater length that carry roadways open to the public. It does not include railroad bridges. Other interesting fact: according to the same report, close to 25% of all bridges are either Structurally Deficient (SD) or Functionally Obsolete (FO).
Per the Federal Highway Authority (FHWA): "An SD bridge is one that (1) has been restricted to light vehicles only, (2) is closed, or (3) requires immediate rehabilitation to remain open. An FO bridge is one in which the deck geometry, load carrying capacity (comparison of the original design load to the State legal load), clearance, or approach roadway alignment no longer meets the usual criteria for the system of which it is an integral part."
What force keeps a bridge from breaking?
well im looking for that answer but havent quite found it but i got this.....
The truss elements are subjected only to tensile and compressive loads, and thus are designed accordingly. Truss bridges are not intended to withstand the bending forces, and are best suitable for the straight alignments. A truss bridge is designed to endure extreme weights and also cover extended gaps.
What is the weaknesses of the cable stayed bridge?
it will topple over if there is too much weight on one side ^_^
How much money did it cost to build the new river gorge bridge?
The cost of the project was $24 million and was paid for by tolls which were removed Dec. 24, 1993.
How many tunnels are involved in the channel tunnel?
Three; two 7.6 metre running tunnels and a service tunnel between them.
What are the four most famous US Bridges?
The Brooklyn Bridge, the Golden Gate Bridge, the Verranzo Narrows Bridge and the Royal Gorge Bridge.
