List. There are presently 321 structures in this category in the database. The first known building in America was a house built by William Penn on his estate of Ardentia (now Philadelphia).
The majority of these buildings were constructed between 1720 and 1820. They are found in southern New England, south-eastern Pennsylvania, Virginia, North Carolina, South Carolina, and Georgia. A few examples can also be found in Maryland, Delaware, and New Jersey.
This type of building is characterized by a rectangular floor plan with a single storey above ground level and a basement. The walls are made of brick or stone and the roof is usually flat. The entryway is usually through a large door which leads to a small vestibule or hall. From there, visitors turn right and walk up two flights of stairs or use a elevator to reach the living quarters. Windows are generally only found on the second story and sometimes even then only for any rooms that have access to a private yard or patio area. Doors are usually made of wood and range in size from approximately 60 inches high and 40 inches wide at the top to 90 inches high and 50 inches wide at the top. Ceilings are usually 12 feet high.
Vertical lift bridges are listed below. There are presently 226 structures in this category in the database.
The first vertical lift bridge was built by the Pennsylvania Railroad at its Wilkes-Barre and New York City terminal in 1943. Since then, the method has become standard for large crossings that cannot be or should not be obstructed by traffic lights.
In addition to railroad use, vertical lift bridges have been built by water carriers, motor vehicle manufacturers, and military planners. This type of bridge is particularly useful where right-of-way is limited or where a large crossing volume is required.
A vertical lift bridge uses jacks instead of hinges to raise the span deck. The jacks are operated by an electrical drive system that can either be powered from the grid or generated from solar panels. The system is fully automated with sensors detecting obstruction beneath the roadbed and controls directing electricity to the jack drives to lift each side of the bridge independently.
When traffic has passed over the bridge, the drivers' assistance program your car provides will bring the bridge down for you. If you own a vehicle with a manual transmission, this is done manually by a human operator under direction from an onboard computer system.
Bridge that swings
|Ancestor||Truss bridge, cantilever bridge|
|Carries||Automobile, truck, light rail, heavy rail|
This is a list of bridges numbered 1 through 100 out of a total of 1,346 in the suspension bridge inventory for the country USA. Virginia and Georgetown, District of Columbia (Potomac River)
|Bridgemeister ID:||4 (added before 2003)|
|Main Span:||128.5 feet|
Bridges come in a variety of forms, but three fundamental types predominate: beam, arch, and suspension. The Brooklyn Bridge, San Francisco-Oakland Bay Bridge, and George Washington Bridge are all suspension bridges.
Beam bridges consist of parallel beams which support the road decking or railing on which vehicles drive. They are the most common type of bridge. The World Trade Center Twin Towers were designed by Edward Larrabee Barnes as a pair of 1,000-foot-tall (300 m) beam bridges for the Port of New York Authority. The towers were never built because of budget cuts following World War II. Instead, the United States Army used them to test its nuclear weapons during Operation Crossroads in 1946 and 1947.
Arch bridges are shaped like an arch, with two parallel vertical supports called piers that hold up the decking and traffic surface over the gap between them. The Golden Gate Bridge is an example of an arch bridge. It connects San Francisco to Marin County by crossing the Golden Gate Strait, which opens onto the Pacific Ocean and provides route clearance for large ships.
The five major types of bridges are as follows:
Five bridges span the Hudson River. The George Washington, completed in 1931, is a large bridge that connects New Jersey with Manhattan. The Benjamin Franklin, opened in 1897, is a smaller bridge that crosses from Bennington County, Vermont, to Pittstown, New Jersey. The Lewis and Clark, built in 1872, links Missouri with Montana. The Walter S. Page, named after the president of the Pennsylvania Railroad Company, was completed in 1910. This bridge crosses between Port Jervis, New York, and Morristown, New Jersey.
Four other bridges cross the Hudson River in New York. The Bayonne Bridge, the longest suspension bridge in the Western Hemisphere, connects Bayonne, New Jersey, with Bayonne, New York. It was built in 1961-1971. The Tappan Zee Bridge, which opened in 1955, connects Tarrytown, New York, with Rockland County, New York. The Henry Hudson, completed in 1909, connects Peekskill, New York, with Croton-on-Hudson, New York. This is the only cable-stayed bridge on the river.
Wikimedia Commons contains media related to American tied arch bridges. This category contains the following 67 pages, out of a total of 67. This list may no longer be up to date (learn more). This category only contains the following files:.
Tied arch bridge-national bridge museum.jpg
There are two tied arch bridges in the United States. One is the Bay Bridge, which crosses the bay between San Francisco and Oakland. The other is the Rainbow Bridge, which crosses the Willamette River near Portland, Oregon. Both were built with structural components manufactured here in America!
The Bay Bridge was opened to traffic on April 4, 1966. It is 602 feet long and its main span is 565 feet. There are three other major spans each measuring 131 feet. The total length of the bridge is 1,568 feet. It has been called "the most expensive parking lot" because it requires several lanes of traffic to pass each vehicle when crossing from Oakland to San Francisco.
The Rainbow Bridge was built in 1937 by John A. Roebling's Sons Company. They also constructed the Brooklyn Bridge, the Niagara Falls Bridge World Trade Center Memorial, and the Ponte Vecchio in Florence, Italy. The Rainbow Bridge links Troutdale, Oregon, across the Willamette River from Portland.