Bridges and Tunnels

There are 3 ways to prevent rusting

A. Plate the metal with another metal, expensive.

B. Paint or coat the metal with a chemical that prevents the metal from getting wet.

C. Chemically treat the metal so it can only rust a little and it cannot rust through.

Depending on what you are working with would determines the method you use.

A viaduct is a type of bridge, but it has several spans, usually of equal length. Bridges and viaducts can span land or water.

In Romance languages they differentiate between viaduct (bridge over land) and 'ponte' (bridge over water).

There is no point of difference between grade separator or a flyover bridge.The point is that a grade separator can either be a flyover or an under pass, that is any structure which separates the uniform grade of a running highway into two different grades.

They will create a model which is similar to that of the dimensions of the prototype. And also the model which is created should hsve same material properties of that of the prototype. And the model can be tested in the laboratory.

The Northbridge coordinate the comunication and is the main interface between CPU, Graphical Interface Card and the Memory (RAM). Those need more speed and are the most used components in the computer. The Southbridge coordinate and is the interface between Storage units, USB ports, expansion cards (not PCI express), and other devices on computer. Those need less speed on data tranmission. The comunication between northbridge and southbridge is coordinate by the northbridge.

This question is difficult to answer as "suspension bridge" is a very loose term. Ancient people from South America and the Himalayas have used rope suspension bridges to span chasms since ancient times and there are arguments about who first designed/built the first modern bridges.

For information relating to these arguments see the related link below.

PRO: they can be built over waterways, and can be built high, letting taller ships to pass under

PRO: Temporary supports in the middle to keep the bridge from falling aren't needed to keep the bridge from collapsing

CON: They are very flexible and can bend under heavy loads if they are in one spot

CON: They use expensive foundation work with all the load going on if in soft ground

I dont know i need the same answer buddy!

The original Sunshine Skyway Bridge was constructed in 1954, but destroyed in 1980. The new bridge took five years to build and construction took place from 1982-1987.

It is a disadvantage that the same reason Hay's bridge was created is the same reason it is not suitable for measurement of quality factor (Q<10) for Q<10. An advantage is that it is simple expression of the unknown inductor for high quality.

The Brooklyn Bridge is one.

思课买地课

no. the Brooklyn bridge is a suspension bridge

It depends on the construction, how complicated it is. Some simple bridges may be built in less than a year, others may take 4-6 years.

The Millau Viaduct is located in southern France. The architects were Norman Foster and Michel Virlogeux. Construction began on October 16, 2001 and it opened on October 16, 2004.

Many, but not all, castles are surrounded by a moat - a ditch filled with water. At the entrance to the castle there would be a bridge crossing the moat, and if this bridge was capable of being raised or otherwise "withdrawn", it was a draw bridge.

The Sydney Harbour Bridge is significant for being the largest steel arch bridge in the world, though not the longest, with the top of the bridge standing 134 metres above the harbour. At 48.8 m wide, it is the widest bridge in the world (as of 2004). Construction of the bridge began in 1924, and took 1400 men eight years to build at a cost of £4.2 million. Sixteen lives were lost during its construction, while up to 800 families living in the path of the proposed Bridge path were relocated and their homes demolished when construction started.

It is also significant for how it was constructed. The arch of the Sydney Harbour Bridge was built in two halves cantilevering from each shore and tying each half back by steel cables that were anchored into U-shaped tunnels excavated into the sandstone rock. Construction of the two halves of the arch began late in 1928, and the two halves were properly joined around 10pm on 19 August 1930.

The Sydney Harbour Bridge provided a vital link for the city of Sydney across the harbour. Before it was built, the only way to travel between the southern side of the harbour, where the city centre is, and the residential north, was by ferry, or by taking a circuitous, 20 kilometre road route involving five bridge crossings. The Sydney Harbour Bridge is also significant because it is where the 28 May 2000 People's Walk for Reconciliation took place. The walk began at North Sydney station and finished at Darling Harbour, and involved some 250,000 people walking across Sydney's Harbour Bridge to show their support of the process of Reconciliation between Aboriginal Australians and white Australians.

Tires with a 'Load Index' rating of 119 can carry 3,000 pounds each. This is the last set of numbers in your tire designation

I believe a bridge should be considered a simple machine. It saves work and gives mechanical advantage. It can also shorten distance, so unlike an inclined plane it can benefit without increasing distance. It can bypass the need to raise and lower massess into crevasses, it can bypass long journeys down then back up a hill. I could find no discussion anywhere.

The material of choice is stainless steel, because of its cost, abundance, strength, and reliability.

Yes. An arch bridge is one of the more efficient ways of building and maintaining a bridge. Beam bridges are not as efficient. For a given span and height, an arch bridge will carry a greater load using less material. The beam structures of a beam bridge can be constructed of wood, reinforced concrete or steel (in increasing order of strength). The beams, however, must be supported by piers or an abutment at each end, which can be made out of concrete, masonry, stone, or steel (or combination thereof). The arch structure of an arch bridge can be constructed of wood, reinforced concrete, steel, or masonry, and the arch can be supported by abutments as described above, or the arch can extended down to the foundation itself. The primary advantage of an arch is that stresses caused by the load on the bridge are converted primarily into compressive stresses that are carried along the arch into the ground. Materials like stone, masonry and concrete are particularly good at carrying these compressive stresses. In contrast, loads on a typical beam-type bridge creates large tensile stresses on the bottom of the beams. Since stone, masonry and unreinforced concrete have very little capacity to withstand tension, none of these materials can be used to make a reliable and efficient beam-type bridge of any significant span.

the first Truss bridge was built by Palmer in 1811 in Philidelphia

An arch bridge. I think that may have been discovered quite some time ago !!!

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It was - the Romans used arches extensively, in buildings as a well as for bridges. However, the arch is indeed stronger than the plank, or simple beam, bridge because it transmits the loads to its abutments. You can stiffen a beam bridge by fitting it with vertical side-members, or in larger structures, frames (trusses).