What is "chain bridge"

Chain \Chain\ (ch[=a]n), n. [F. cha[^i]ne, fr. L. catena. Cf. Catenate.]

1. A series of links or rings, usually of metal, connected, or fitted into one another, used for various purposes, as of support, of restraint, of ornament, of the exertion and transmission of mechanical power, etc.

   [They] put a chain of gold about his neck.
   --Dan. v. 29.

2. That which confines, fetters, or secures, as a chain; a bond; as, the chains of habit.

   Driven down To chains of darkness and the undying worm.
   --Milton.

3. A series of things linked together; or a series of things connected and following each other in succession; as, a chain of mountains; a chain of events or ideas.

4. (Surv.) An instrument which consists of links and is used in measuring land.

   Note: One commonly in use is Gunter's chain, which consists of one hundred links, each link being seven inches and ninety-two one hundredths in length; making up the total length of rods, or sixty-six, feet; hence, a measure of that length; hence, also, a unit for land measure equal to four rods square, or one tenth of an acre.

5. pl. (Naut.) Iron links bolted to the side of a vessel to bold the dead-eyes connected with the shrouds; also, the channels.

6. (Weaving) The warp threads of a web. --Knight. Chain belt (Mach.), a belt made of a chain; -- used for transmitting power. Chain boat, a boat fitted up for recovering lost cables, anchors, etc. Chain bolt

   1. (Naut.) The bolt at the lower end of the chain plate, which fastens it to the vessel's side.

   2. A bolt with a chain attached for drawing it out of position. Chain bond. See Chain timber. Chain bridge, a bridge supported by chain cables; a suspension bridge. Chain cable, a cable made of iron links. Chain coral (Zo["o]l.), a fossil coral of the genus Halysites, common in the middle and upper Silurian rocks. The tubular corallites are united side by side in groups, looking in an end view like links of a chain. When perfect, the calicles show twelve septa. Chain coupling.

      1. A shackle for uniting lengths of chain, or connecting a chain with an object.

      2. (Railroad) Supplementary coupling together of cars with a chain.

         Chain gang, a gang of convicts chained together.

         Chain hook (Naut.), a hook, used for dragging cables about the deck.

         Chain mail, flexible, defensive armor of hammered metal links wrought into the form of a garment.

         Chain molding (Arch.), a form of molding in imitation of a chain, used in the Normal style.

         Chain pier, a pier suspended by chain.

         Chain pipe (Naut.), an opening in the deck, lined with iron, through which the cable is passed into the lockers or tiers.

         Chain plate (Shipbuilding), one of the iron plates or bands, on a vessel's side, to which the standing rigging is fastened.

         Chain pulley, a pulley with depressions in the periphery of its wheel, or projections from it, made to fit the links of a chain.

         Chain pumps. See in the Vocabulary.

         Chain rule (Arith.), a theorem for solving numerical problems by composition of ratios, or compound proportion, by which, when several ratios of equality are given, the consequent of each being the same as the antecedent of the next, the relation between the first antecedent and the last consequent is discovered.

         Chain shot (Mil.), two cannon balls united by a shot chain, formerly used in naval warfare on account of their destructive effect on a ship's rigging.

         Chain stitch. See in the Vocabulary.

         Chain timber. (Arch.) See Bond timber, under Bond.

         Chain wales. (Naut.) Same as Channels.

         Chain wheel. See in the Vocabulary.

         Closed chain, Open chain (Chem.), terms applied to the chemical structure of compounds whose rational formul[ae] are written respectively in the form of a closed ring (see Benzene nucleus, under Benzene), or in an open extended form.

         Endless chain, a chain whose ends have been united by a link.

The Chain Bridge is a footbridge over the river Dee at Berwyn, Llangollen, Denbighshire, North Wales.

It is jointly owned by Llangollen Town Council and Llantysilio Community Council, the bridge linking the two communities. A pathway from Berwyn railway station, now part of the Llangollen Railway, leads under a subway and down to the bridge and to the Chain Bridge Hotel on the other side.

The current bridge is the third such bridge, and was built by Sir Henry Beyer Robertson, following the destruction of the previous second chain bridge during severe flooding.

The Széchenyi Chain Bridge (, ) is a suspension bridge that spans the River Danube between Buda and Pest, the western and eastern sides of Budapest, the capital of Hungary. Designed by the English engineer William Tierney Clark, it was the first permanent bridge across the Danube in Hungary, and was opened in 1849.

It is anchored on the Pest side of the river to Széchenyi (formerly Roosevelt) Square, adjacent to the Gresham Palace and the Hungarian Academy of Sciences, and on the Buda side to Adam Clark Square, near the Zero Kilometre Stone and the lower end of the Castle Hill Funicular, leading to Buda Castle.

The bridge has the name of István Széchenyi, a major supporter of its construction, attached to it, but is most commonly known as the Chain Bridge. At the time of its construction, it was regarded as one of the modern world's engineering wonders. It has asserted an enormous significance in the country's economic, social and cultural life, much as the Brooklyn Bridge has in New York and United States of America. Its decorations made of cast iron, and its construction, radiating calm dignity and balance, have elevated the Chain Bridge to a high stature in Europe. It became a symbol of advancement, national awakening, and the linkage between East and West.

Chain Bridges are suspension bridges built with chains. Some bridges built using this design have retained the name "Chain Bridge". Thus as a proper noun, it may refer to:

In Hungary:

• Chain Bridge (Budapest), a bridge over the Danube in Budapest, Hungary

In the United Kingdom:

• Union Bridge (Tweed), a bridge over the River Tweed between England and Scotland
• Chain Bridge, a bridge over the River Usk in Monmouthshire, Wales
• Chain Bridge (Berwyn), a bridge over the River Dee at Berwyn, Llangollen, Denbighshire, North Wales

In the United States:

• Chain Bridge (Easton, Pennsylvania), a historic change bridge spanning the Lehigh River
• Chain Bridge (Potomac River) a bridge at the Little Falls of the Potomac River in Washington, D.C.
• Chain Bridge (Massachusetts), a bridge which crosses the Merrimack River, connecting Amesbury and Newburyport, Massachusetts

The Chain Bridge is a viaduct which crosses the Potomac River at Little Falls in Washington, D.C. It carries close to 22,000 cars a day. It connects Washington with affluent sections of Arlington and Fairfax counties in Virginia. On the Washington side, the bridge connects with Canal Road. Left turns onto the Clara Barton Parkway from the Chain Bridge are prohibited, but the reverse is permitted. On the Virginia side, the bridge connects with State Route 123 (Chain Bridge Road), which provides access to the George Washington Memorial Parkway.

The Chain Bridge has three lanes (of which the center is reversible) and can be safely accessed by pedestrians and cyclists. The pedestrian sidewalk provides access to the Chesapeake and Ohio Canal towpath via a ramp.

The Chain Bridge is a 225-foot, single-span suspension bridge, which crosses the right branch of the Merrimack River flowing around Deer Island. As the boundary between the city of Newburyport and the city of Amesbury, Massachusetts runs through Deer Island, Chain Bridge does connect the two communities. Crossing from the island to the left bank of the Merrimack requires traversing the Derek S. Hines Memorial Bridge, formerly the Essex-Merrimack Drawbridge (reconstructed and reopened in August, 2012). As the Chain Bridge is better known because of its structure, it is often incorrectly represented in literature as a single bridge spanning the Merrimack.

The current span was completed in 1910 at the site of two previous bridges. The first was a timber-arch truss which existed between 1792 and 1810. It was replaced in 1810 by a wrought-iron chain suspension bridge. This was replaced by the current span in 1909, which is still referred to as "Chain Bridge".

The Chain Bridge is the only suspension bridge currently maintained by the Massachusetts Department of Transportation. In 1990 the bridge was part of a statewide survey as part of the Massachusetts Historic Bridge Recording Project. It has undergone several renovations, most recently in 2003.

Chain Bridge or Change Bridge, also known as the Lehigh Canal Swinging Bridge and as Wire Towing Path at Pool No. 8, is a historic change bridge spanning the Lehigh River at Palmer Township and Williams Township, Northampton County, Pennsylvania. It was built in 1856-1857, and consists of three stone piers and two spans. Each pier is approximately 30 feet high. In 1972, the bridge consisted of the piers and the cable.

It was listed on the National Register of Historic Places in 1974. The NRHP listing included a area. It is included within a large historic district, Lehigh Canal: Eastern Section Glendon and Abbott Street Industrial Sites, which has numerous other structures and buildings, and which was listed on the NRHP in 1979.