99-554: The Dumbarton Bridge, also known as the Q Street Bridge and the Buffalo Bridge , is a historic masonry arch bridge in Washington, D.C. Dumbarton Bridge was built between 1914 and 1915 to convey Q Street Northwest across Rock Creek Park between the city's Dupont Circle and Georgetown neighborhoods. Around 1905, the residents of Georgetown wanted to reduce traffic to Washington along M Street . One frequently proposed idea
198-596: A bridge-restaurant which is a bridge built to serve as a restaurant. Other suspension bridge towers carry transmission antennas. Conservationists use wildlife overpasses to reduce habitat fragmentation and animal-vehicle collisions. The first animal bridges sprung up in France in the 1950s, and these types of bridges are now used worldwide to protect both large and small wildlife. Bridges are subject to unplanned uses as well. The areas underneath some bridges have become makeshift shelters and homes to homeless people, and
297-520: A bridge is to be designed, standards authorities specify simplified notional load models, notably HL-93, intended to give the same load effects as the characteristic maximum values. The Eurocode is an example of a standard for bridge traffic loading that was developed in this way. Most bridge standards are only applicable for short and medium spans - for example, the Eurocode is only applicable for loaded lengths up to 200 m. Longer spans are dealt with on
396-471: A case-by-case basis. It is generally accepted that the intensity of load reduces as span increases because the probability of many trucks being closely spaced and extremely heavy reduces as the number of trucks involved increases. It is also generally assumed that short spans are governed by a small number of trucks traveling at high speed, with an allowance for dynamics. Longer spans on the other hand, are governed by congested traffic and no allowance for dynamics
495-480: A combination of structural health monitoring and testing. This is regulated in country-specific engineer standards and includes an ongoing monitoring every three to six months, a simple test or inspection every two to three years and a major inspection every six to ten years. In Europe, the cost of maintenance is considerable and is higher in some countries than spending on new bridges. The lifetime of welded steel bridges can be significantly extended by aftertreatment of
594-471: A crown in heraldry and other imagery such as cap badges , uniforms, government logos and elsewhere. The heraldic crown is chosen by the reigning monarch. From 1661 to the reign of Queen Victoria , an image of St Edward's Crown was used. The early part of Victoria's reign depicted the Imperial State Crown created for her coronation , while a Tudor Crown began to be used from the 1860s. In 1901,
693-399: A different site, and re-used. They are important in military engineering and are also used to carry traffic while an old bridge is being rebuilt. Movable bridges are designed to move out of the way of boats or other kinds of traffic, which would otherwise be too tall to fit. These are generally electrically powered. The Tank bridge transporter (TBT) has the same cross-country performance as
792-594: A few will predominate. The separation of forces and moments may be quite clear. In a suspension or cable-stayed bridge , the elements in tension are distinct in shape and placement. In other cases the forces may be distributed among a large number of members, as in a truss. The world's longest beam bridge is Lake Pontchartrain Causeway in southern Louisiana in the United States, at 23.83 miles (38.35 km), with individual spans of 56 feet (17 m). Beam bridges are
891-564: A form of boardwalk across marshes ; examples of such bridges include the Sweet Track and the Post Track in England, approximately 6000 years old. Ancient people would also have used log bridges consisting of logs that fell naturally or were intentionally felled or placed across streams. Some of the first human-made bridges with significant span were probably intentionally felled trees. Among
990-640: A former network of roads, designed to accommodate chariots , between the fort of Tiryns and town of Epidauros in the Peloponnese , in southern Greece . Dating to the Greek Bronze Age (13th century BC), it is one of the oldest arch bridges still in existence and use. Several intact, arched stone bridges from the Hellenistic era can be found in the Peloponnese. The greatest bridge builders of antiquity were
1089-499: A network of other institutions of a similar nature." Canadian academic Philippe Lagassé found the crown "acts in various capacities, as such: crown-in-council (executive); crown-in-parliament (legislative); crown-in-court (judicial). It is also an artificial person and office as a corporation sole. At its most basic, "the Crown" is, in the UK and other Commonwealth realms, what in most other countries
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#17328546719011188-578: A span of 552 m (1,811 ft). The bridge was opened 29 April 2009, in Chongqing , China. The longest suspension bridge in the world is the 4,608 m (15,118 ft) 1915 Çanakkale Bridge in Turkey. The longest cable-stayed bridge since 2012 is the 1,104 m (3,622 ft) Russky Bridge in Vladivostok , Russia. Some Engineers sub-divide 'beam' bridges into slab, beam-and-slab and box girder on
1287-732: A stream. Often in palaces, a bridge will be built over an artificial waterway as symbolic of a passage to an important place or state of mind. A set of five bridges cross a sinuous waterway in an important courtyard of the Forbidden City in Beijing, China. The central bridge was reserved exclusively for the use of the Emperor and Empress, with their attendants. The estimated life of bridges varies between 25 and 80 years depending on location and material. Bridges may age hundred years with proper maintenance and rehabilitation. Bridge maintenance consisting of
1386-479: A tank even when fully loaded. It can deploy, drop off and load bridges independently, but it cannot recover them. Double-decked (or double-decker) bridges have two levels, such as the George Washington Bridge , connecting New York City to Bergen County , New Jersey , US, as the world's busiest bridge, carrying 102 million vehicles annually; truss work between the roadway levels provided stiffness to
1485-457: A word, the compendious formal, executive and administrative powers and apparatus attendant upon the modern constitutional and monarchical state." Lord Simon of Glaisdale stated: The crown as an object is a piece of jewelled headgear under guard at the Tower of London . But it symbolizes the powers of government which were formerly wielded by the wearer of the crown ... The term "the Crown"
1584-446: Is "the state"." Historically, the Crown was considered to be indivisible. Two judgments— Ex parte Indian Association of Alberta ( EWCA , 1982) and Ex parte Quark ( House of Lords , 2005)—challenged that view. Today, it is considered separate in every country, province, state, or territory, regardless of its degree of independence, that has the shared monarch as part of the respective country's government; though, limitations on
1683-456: Is a bridge that carries water, resembling a viaduct, which is a bridge that connects points of equal height. A road-rail bridge carries both road and rail traffic. Overway is a term for a bridge that separates incompatible intersecting traffic, especially road and rail. Some bridges accommodate other purposes, such as the tower of Nový Most Bridge in Bratislava , which features a restaurant, or
1782-462: Is also historically significant as it is the world's oldest open-spandrel stone segmental arch bridge. European segmental arch bridges date back to at least the Alconétar Bridge (approximately 2nd century AD), while the enormous Roman era Trajan's Bridge (105 AD) featured open-spandrel segmental arches in wooden construction. Rope bridges , a simple type of suspension bridge , were used by
1881-574: Is an early example of a double-decked bridge. The upper level carries a railway, and the lower level is used for road traffic. Other examples include Britannia Bridge over the Menai Strait and Craigavon Bridge in Derry, Northern Ireland. The Oresund Bridge between Copenhagen and Malmö consists of a four-lane highway on the upper level and a pair of railway tracks at the lower level. Tower Bridge in London
1980-491: Is carried out by the civil servants employed in the various government departments." This interpretation was supported by section 8 of the Pensions (Colonial Service) Act 1887 ( 50 & 51 Vict. c. 13), which set the terms "permanent civil service of the state", "permanent civil service of Her Majesty" and "permanent civil service of the Crown" as having the same meaning. The Crown was first defined as an 'imperial' crown during
2079-421: Is constructed for the purpose of providing passage over the obstacle, which is usually something that is otherwise difficult or impossible to cross. There are many different designs of bridges, each serving a particular purpose and applicable to different situations. Designs of bridges vary depending on factors such as the function of the bridge, the nature of the terrain where the bridge is constructed and anchored,
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#17328546719012178-485: Is different example of a double-decked bridge, with the central section consisting of a low-level bascule span and a high-level footbridge . A viaduct is made up of multiple bridges connected into one longer structure. The longest and some of the highest bridges are viaducts, such as the Lake Pontchartrain Causeway and Millau Viaduct . A multi-way bridge has three or more separate spans which meet near
2277-417: Is led by architects, bridges are usually designed by engineers. This follows from the importance of the engineering requirements; namely spanning the obstacle and having the durability to survive, with minimal maintenance, in an aggressive outdoor environment. Bridges are first analysed; the bending moment and shear force distributions are calculated due to the applied loads. For this, the finite element method
2376-540: Is needed. Calculating the loading due to congested traffic remains a challenge as there is a paucity of data on inter-vehicle gaps, both within-lane and inter-lane, in congested conditions. Weigh-in-Motion (WIM) systems provide data on inter-vehicle gaps but only operate well in free flowing traffic conditions. Some authors have used cameras to measure gaps and vehicle lengths in jammed situations and have inferred weights from lengths using WIM data. Others have used microsimulation to generate typical clusters of vehicles on
2475-508: Is not to be confused with any physical crown , such as those of the British regalia . The term is also found in various expressions such as Crown land , which some countries refer to as public land or state land ; as well as in some offices, such as minister of the Crown , Crown attorney , and Crown prosecutor . The term the Crown does not have a single definition. Legal scholars Maurice Sunkin and Sebastian Payne opined, "the nature of
2574-494: Is the royal prerogative by which unowned property, primarily unclaimed inheritances, becomes the property of the Crown. As such, the physical crown and the property belonging to successive monarchs in perpetuity came to be separated from the person of the monarch and his or her private property. After several centuries of the monarch personally exercising supreme legislative, executive, and judicial power, these functions decreased as parliaments, ministries, and courts grew through
2673-737: Is the most popular. The analysis can be one-, two-, or three-dimensional. For the majority of bridges, a two-dimensional plate model (often with stiffening beams) is sufficient or an upstand finite element model. On completion of the analysis, the bridge is designed to resist the applied bending moments and shear forces, section sizes are selected with sufficient capacity to resist the stresses. Many bridges are made of prestressed concrete which has good durability properties, either by pre-tensioning of beams prior to installation or post-tensioning on site. In most countries, bridges, like other structures, are designed according to Load and Resistance Factor Design (LRFD) principles. In simple terms, this means that
2772-403: Is therefore used in constitutional law to denote the collection of such of those powers as remain extant (the royal prerogative ), together with such other powers as have been expressly conferred by statute on "the Crown". Lord Diplock suggested the Crown means "the government [and] all of the ministers and parliamentary secretaries under whose direction the administrative work of the government
2871-598: The Common Informers Act 1951 ended the practice of allowing such suits by common informers. The term "Crown forces" has been used by Irish republicans and nationalists , including members of paramilitary groups, to refer to British security forces which operate in Ireland . The term was used by various iterations of the Irish Republican Army (IRA) during conflicts such as Irish War of Independence and
2970-523: The Copyright, Designs and Patents Act 1988 made an exception for 'any right or privilege of the Crown' not written in an act of parliament, thus preserving the rights of the Crown under the unwritten royal prerogative. In addition, use of images of the crowns for commercial purposes is specifically restricted in the UK (and in countries which are party to the Paris Convention ) under sections 4 and 99 of
3069-502: The Inca civilization in the Andes mountains of South America, just prior to European colonization in the 16th century. The Ashanti built bridges over streams and rivers . They were constructed by pounding four large forked tree trunks into the stream bed, placing beams along these forked pillars, then positioning cross-beams that were finally covered with four to six inches of dirt. During
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3168-542: The Roman era , as the technology for cement was lost (then later rediscovered). In India, the Arthashastra treatise by Kautilya mentions the construction of dams and bridges. A Mauryan bridge near Girnar was surveyed by James Princep . The bridge was swept away during a flood, and later repaired by Puspagupta, the chief architect of emperor Chandragupta I . The use of stronger bridges using plaited bamboo and iron chain
3267-833: The University of Minnesota ). Likewise, in Toronto , the Prince Edward Viaduct has five lanes of motor traffic, bicycle lanes, and sidewalks on its upper deck; and a pair of tracks for the Bloor–Danforth subway line on its lower deck. The western span of the San Francisco–Oakland Bay Bridge also has two levels. Robert Stephenson 's High Level Bridge across the River Tyne in Newcastle upon Tyne , completed in 1849,
3366-596: The ancient Romans . The Romans built arch bridges and aqueducts that could stand in conditions that would damage or destroy earlier designs, some of which still stand today. An example is the Alcántara Bridge , built over the river Tagus , in Spain. The Romans also used cement, which reduced the variation of strength found in natural stone. One type of cement, called pozzolana , consisted of water, lime , sand, and volcanic rock . Brick and mortar bridges were built after
3465-495: The river Severn . With the Industrial Revolution in the 19th century, truss systems of wrought iron were developed for larger bridges, but iron does not have the tensile strength to support large loads. With the advent of steel, which has a high tensile strength, much larger bridges were built, many using the ideas of Gustave Eiffel . In Canada and the United States, numerous timber covered bridges were built in
3564-421: The 13th century. The term the Crown then developed into a means by which to differentiate the monarch's official functions from his personal choices and actions. Even within mediaeval England, there was the doctrine of capacities separating the person of the king from his actions in the capacity of monarch. When the kingdom of England merged with those of Scotland and Ireland , the concept extended into
3663-511: The 18th century, there were many innovations in the design of timber bridges by Hans Ulrich Grubenmann , Johannes Grubenmann , as well as others. The first book on bridge engineering was written by Hubert Gautier in 1716. A major breakthrough in bridge technology came with the erection of the Iron Bridge in Shropshire, England in 1779. It used cast iron for the first time as arches to cross
3762-874: The Bailiwick of Jersey belonging to the Crown in Right of Jersey and not to the Crown Estate of the United Kingdom. The Succession to the Crown (Jersey) Law 2013 defined the Crown, for the purposes of implementing the Perth Agreement in Jersey law, as the Crown in Right of the Bailiwick of Jersey . Legislation in the Isle of Man also defines the Crown in Right of the Isle of Man as being separate from
3861-584: The Commonwealth realms is a similar, but separate, legal concept. To distinguish the institution's role in one jurisdiction from its place in another, Commonwealth law employs the expression the Crown in Right of [place] ; for example, the Crown in Right of the United Kingdom, the Crown in Right of Canada, the Crown in Right of the Commonwealth of Australia, etc. Because both Canada and Australia are federations, there are also crowns in right of each Canadian province and each Australian state . When referring to
3960-525: The Crown is used to mostly mean the authority of government; its meaning changes in different contexts. In the context of people considering the claims and settlements related to the Treaty of Waitangi , professor of history Alan Ward defines the Crown as "the people of New Zealand—including Māori themselves—acted through elected parliament and government." In the Bailiwick of Guernsey , legislation refers to
4059-490: The Crown has been taken for granted, in part because it is fundamental and, in part, because many academics have no idea what the term the Crown amounts to". Nicholas Browne-Wilkinson theorised that the Crown is "an amorphous, abstract concept" and, thus, "impossible to define", while William Wade stated the Crown "means simply the Queen". Warren J. Newman described the Crown is "a useful and convenient means of conveying, in
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4158-403: The Crown in Right of the Bailiwick of Guernsey or the Crown in Right of the Bailiwick and the law officers of the Crown of Guernsey submitted that, "the Crown in this context ordinarily means the Crown in right of the république of the Bailiwick of Guernsey" and that this comprises "the collective governmental and civic institutions, established by and under the authority of the monarch, for
4257-602: The Crown in Right of the United Kingdom. Following the Lords' decision in Ex parte Quark , 2005, it is held that the King, in exercising his authority over British Overseas Territories , does not act on the advice of the Cabinet of the United Kingdom , but, in his role as king of each territory, with the exception of fulfilling the UK's international responsibilities for its territories. To comply with
4356-402: The Crown in multiple jurisdictions, wording is typically akin to "the Crown in right of [place], and all its other capacities". The powers of a realm's crown are exercised either by the monarch, personally, or by his or her representative on the advice of the appropriate local ministers , legislature, or judges, none of which may advise the Crown in any other realm. In New Zealand, the term
4455-497: The Crown's legal personality is usually regarded as a corporation sole , it can, at least for some purposes, be described as a corporation aggregate headed by the monarch. Frederic William Maitland argued the Crown is a corporation aggregate embracing the government and the "whole political community". J.G. Allen preferred to view the Crown as a corporation sole; one office occupied by a single person, enduring "through generations of incumbents and, historically, lends coherence to
4554-443: The Crown; usages such as, "for the Crown, Joe Bloggs argued", being common. The Crown can also be a plaintiff or defendant in civil actions to which the government of the Commonwealth realm in question is a party. Such crown proceedings are often subject to specific rules and limitations, such as the enforcement of judgments against the Crown. Qui tam lawsuits on behalf of the Crown were once common, but have been unusual since
4653-481: The European Union , where "Miller" is Gina Miller , a citizen. Until the end of the 20th century, such case titles used the pattern R v Secretary of State for Exiting the European Union, ex parte Miller . Either form may be abbreviated R (Miller) v Secretary of State for Exiting the European Union . In Scotland , criminal prosecutions are undertaken by the lord advocate (or the relevant procurator fiscal ) in
4752-665: The Troubles . As noted by Irish republican Danny Morrison , "[t]he term 'security forces' suggests legitimacy , which is why republicans prefer terms like 'the Brits' or 'the Crown Forces', which undermines their authority." Due to the Irish War of Independence, "the phrase 'Crown Forces' came to represent something abhorrent in the Republican narrative". The Crown is represented by the image of
4851-619: The Tudor Crown design was standardised and continued in use until the reign of Elizabeth II in 1952 when a heraldic St Edward's Crown was restored. In 2022, Charles III opted for a modified Tudor Crown design. Crown copyright applies in perpetuity to depictions of the Royal Arms and any of its constituent parts under the royal prerogative , and The National Archives restricts rights to reproduce them. Although Crown Copyright usually expires 50 years after publication, Section 171(b) of
4950-400: The abbreviation R (i.e. the case name at trial would be R v Smith ; if the defendant appeals against the Crown, the case name would be Smith v The King ). In Western Australia and Tasmania , prosecutions will be brought in the name of the respective state instead of the Crown (e.g. The State of Western Australia v Smith ). Victorian trials in the original jurisdiction will be brought in
5049-610: The appearance of the bridge can have great importance. Often, this is the case with a large bridge that serves as an entrance to a city, or crosses over a main harbor entrance. These are sometimes known as signature bridges. Designers of bridges in parks and along parkways often place more importance on aesthetics, as well. Examples include the stone-faced bridges along the Taconic State Parkway in New York. Bridges are typically more aesthetically pleasing if they are simple in shape,
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#17328546719015148-564: The appropriate government minister as the party, instead. When a case is announced in court, the clerk or bailiff may refer to the Crown orally as our sovereign lord the king (or our sovereign lady the queen ). In reporting on court proceedings in New Zealand , news reports will refer to the prosecuting lawyer (often called a Crown prosecutor, as in Canada and the United Kingdom) as representing
5247-613: The attention of the general public in the 1990s by the novel, movie and play The Bridges of Madison County . In 1927, welding pioneer Stefan Bryła designed the first welded road bridge in the world, the Maurzyce Bridge which was later built across the river Słudwia at Maurzyce near Łowicz , Poland in 1929. In 1995, the American Welding Society presented the Historic Welded Structure Award for
5346-596: The basis of their cross-section. A slab can be solid or voided (though this is no longer favored for inspectability reasons) while beam-and-slab consists of concrete or steel girders connected by a concrete slab. A box-girder cross-section consists of a single-cell or multi-cellular box. In recent years, integral bridge construction has also become popular. Most bridges are fixed bridges, meaning they have no moving parts and stay in one place until they fail or are demolished. Temporary bridges, such as Bailey bridges , are designed to be assembled, taken apart, transported to
5445-515: The bench) governance and the civil service . The concept of the Crown as a corporation sole developed first in the Kingdom of England as a separation of the physical crown and property of the kingdom from the person and personal property of the monarch. It spread through English and later British colonisation and is now rooted in the legal lexicon of all 15 Commonwealth realms, their various dependencies, and states in free association with them. It
5544-413: The body politic (which never dies). The Crown and the sovereign are "conceptually divisible but legally indivisible [...] The office cannot exist without the office-holder". The terms the state , the Crown , the Crown in Right of [jurisdiction] , His Majesty the King in Right of [jurisdiction] , and similar, are all synonymous and the monarch's legal personality is sometimes referred to simply as
5643-437: The bridge to Poland. Bridges can be categorized in several different ways. Common categories include the type of structural elements used, by what they carry, whether they are fixed or movable, and by the materials used. Bridges may be classified by how the actions of tension , compression , bending , torsion and shear are distributed through their structure. Most bridges will employ all of these to some degree, but only
5742-844: The bridge's approach and to keep the street continuous within Georgetown the Dumbarton House , then known as Bellevue, was moved about 100 feet (30 m) northward from its original site in the middle of the current Q Street to its present position on the north side of the Street. The District requested bids to construct the bridge in June 1913, but none of the four bids were within the appropriated budget. The plans were modified so that there would only be five spans rather than seven in order to save costs. The project went out to bid again in November. A.L. Guidone won
5841-610: The bridge's stone was intended to evoke the warm tones of Spain and Italy. Along with the buffalo theme the arches are decorated by Indian head designs by Glenn Brown based on a life mask of the Sioux Chief Kicking Bear in the Smithsonian Institution . The curved design is due to need to match the section of Q Street NW in Dupont Circle that is slightly north of the section in Georgetown. In order to accommodate
5940-727: The bridge. British crown The Crown broadly represents the state in all its aspects within the jurisprudence of the Commonwealth realms and their subdivisions (such as the Crown Dependencies , overseas territories , provinces , or states ). The term can be used to refer to the office of the monarch or the monarchy as institutions; to the rule of law ; or to the functions of executive (the Crown- in-council ), legislative (the Crown-in- parliament ), and judicial (the Crown on
6039-439: The center of the bridge. Multi-way bridges with only three spans appear as a "T" or "Y" when viewed from above. Multi-way bridges are extremely rare. The Tridge , Margaret Bridge , and Zanesville Y-Bridge are examples. A bridge can be categorized by what it is designed to carry, such as trains, pedestrian or road traffic ( road bridge ), a pipeline ( Pipe bridge ) or waterway for water transport or barge traffic. An aqueduct
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#17328546719016138-483: The construction bid. Its four buffalo sculptures , the largest cast in a single piece of bronze, are by Alexander Phimister Proctor , who also designed the tigers on the Sixteenth Street Bridge . The budget to build the bridge was set at $ 275,000. Construction of the bridge began on March 14, 1914. Construction of the bridge was completed by October 1915, although it took two more months to grade and pave
6237-408: The copyright for government publications ( Crown copyright ). This is all in his or her position as sovereign, not as an individual; all such property is held by the Crown in perpetuity and cannot be sold by the sovereign without the proper advice and consent of his or her relevant ministers. The Crown also represents the legal embodiment of executive, legislative , and judicial governance. While
6336-421: The court's decision, the territorial governors now act on the advice of each territory's executive and the UK government can no longer disallow legislation passed by territorial legislatures. In criminal proceedings , the state is the prosecuting party; the case is usually designated (in case citation ) as R v [ defendant ] , where R can stand for either rex (if the current monarch is male) or regina (if
6435-467: The deck is thinner in proportion to its span, the lines of the structure are continuous, and the shapes of the structural elements reflect the forces acting on them. To create a beautiful image, some bridges are built much taller than necessary. This type, often found in east-Asian style gardens, is called a Moon bridge , evoking a rising full moon. Other garden bridges may cross only a dry bed of stream-washed pebbles, intended only to convey an impression of
6534-401: The estimate to divert and fill in the creek and extend streets $ 1.3 million. Another idea was to move the Woodley Lane Bridge to the Q Street location rather than build a new bridge altogether. Engineers determined that the cost to move the Woodley Lane bridge would be too great and the Woodley Lane Bridge would not be available to be moved until its replacement, the Connecticut Avenue Bridge ,
6633-427: The governance of these islands, including the states of Guernsey and legislatures in the other islands, the royal court and other courts, the lieutenant governor, parish authorities, and the Crown acting in and through the Privy Council". In the Bailiwick of Jersey , statements by the law officers of the Crown define the Crown's operation in that jurisdiction as the Crown in Right of Jersey , with all Crown land in
6732-420: The government, a case in judicial review is brought by the Crown against a minister of the Crown on the application of a claimant . The titles of these cases now follow the pattern of R (on the application of [X]) v [Y] , notated as R ([X]) v [Y] , for short. Thus, R (Miller) v Secretary of State for Exiting the European Union is R (on the application of Miller and other) v Secretary of State for Exiting
6831-431: The lake. Between 1358 and 1360, Rudolf IV, Duke of Austria , built a 'new' wooden bridge across the lake that was used until 1878; it was approximately 1,450 metres (4,760 ft) long and 4 metres (13 ft) wide. On 6 April 2001, a reconstruction of the original wooden footbridge was opened; it is also the longest wooden bridge in Switzerland. The Arkadiko Bridge is one of four Mycenaean corbel arch bridges part of
6930-435: The late 1700s to the late 1800s, reminiscent of earlier designs in Germany and Switzerland. Some covered bridges were also built in Asia. In later years, some were partly made of stone or metal but the trusses were usually still made of wood; in the United States, there were three styles of trusses, the Queen Post, the Burr Arch and the Town Lattice. Hundreds of these structures still stand in North America. They were brought to
7029-466: The legal lexicons of the United Kingdom and its dependencies and overseas territories and, eventually, all of the independent Commonwealth realms . There are, thus, now many distinct crowns, as a legal concept, "worn by"—or many different offices of monarch occupied by—one person as sovereign (supreme monarch) of each country. However, the Crown can also mean the pan-national institution shared by all 15 Commonwealth realms. In each Commonwealth realm,
7128-427: The load is factored up by a factor greater than unity, while the resistance or capacity of the structure is factored down, by a factor less than unity. The effect of the factored load (stress, bending moment) should be less than the factored resistance to that effect. Both of these factors allow for uncertainty and are greater when the uncertainty is greater. Most bridges are utilitarian in appearance, but in some cases,
7227-406: The material used to make it, and the funds available to build it. The earliest bridges were likely made with fallen trees and stepping stones . The Neolithic people built boardwalk bridges across marshland. The Arkadiko Bridge , dating from the 13th century BC, in the Peloponnese is one of the oldest arch bridges in existence and use. The Oxford English Dictionary traces the origin of
7326-405: The monarch is female), and the v stands for versus . For example, a criminal case against Smith might be referred to as R v Smith and verbally read as "the Crown and Smith". The Crown is, in general, immune to prosecution and civil lawsuits . So, R is rarely (albeit sometimes ) seen on the right hand side of the 'v' in the first instance. To pursue a case against alleged unlawful activity by
7425-400: The name of the director of public prosecutions . The Commonwealth director of public prosecutions may choose which name to bring the proceeding in. Judges usually refer to the prosecuting party as simply "the prosecution" in the text of judgments. In civil cases where the Crown is a party, it is a customary to list the body politic (e.g. State of Queensland or Commonwealth of Australia ) or
7524-506: The name of the Crown. Accordingly, the abbreviation HMA is used in the High Court of Justiciary for His/Her Majesty's Advocate , in place of rex or regina ; as in, HMA v Al Megrahi and Fahima . Most jurisdictions in Australia use R or The King (or The Queen ) in criminal cases. If the Crown is the respondent to an appeal, the words The King will be spelled out, instead of using
7623-670: The oldest timber bridges is the Holzbrücke Rapperswil-Hurden bridge that crossed upper Lake Zürich in Switzerland; prehistoric timber pilings discovered to the west of the Seedamm causeway date back to 1523 BC. The first wooden footbridge there led across Lake Zürich; it was reconstructed several times through the late 2nd century AD, when the Roman Empire built a 6-metre-wide (20 ft) wooden bridge to carry transport across
7722-629: The past, these load models were agreed by standard drafting committees of experts but today, this situation is changing. It is now possible to measure the components of bridge traffic load, to weigh trucks, using weigh-in-motion (WIM) technologies. With extensive WIM databases, it is possible to calculate the maximum expected load effect in the specified return period. This is an active area of research, addressing issues of opposing direction lanes, side-by-side (same direction) lanes, traffic growth, permit/non-permit vehicles and long-span bridges (see below). Rather than repeat this complex process every time
7821-431: The power of the monarch in right of each territory vary according to relevant laws, thus making the difference between full sovereignty, semi-sovereignty, dependency, etc. The Lords of Appeal wrote, "the Queen is as much the Queen of New South Wales and Mauritius and other territories acknowledging her as head of state as she is of England and Wales, Scotland, Northern Ireland, or the United Kingdom." The Crown in each of
7920-468: The principles of Load and Resistance Factor Design . Before factoring to allow for uncertainty, the load effect is generally considered to be the maximum characteristic value in a specified return period . Notably, in Europe, it is the maximum value expected in 1000 years. Bridge standards generally include a load model, deemed to represent the characteristic maximum load to be expected in the return period. In
8019-422: The realm and crown of England, is only to assert that our king is equally sovereign and independent within these his dominions, as any emperor is in his empire; and owes no kind of subjection to any other potentate on earth." The concept of the Crown took form under the feudal system . Though not used this way in all countries that had this system, in England, all rights and privileges were ultimately bestowed by
8118-565: The reign of Henry VIII in the Ecclesiastical Appeals Act 1532 which declared that 'this realm of England is an empire ... governed by one Supreme Head and King having the dignity and royal estate of the imperial Crown of the same'. In William Blackstone 's 1765 Commentaries on the Laws of England , he explained that "the meaning therefore of the legislature, when it uses these terms of empire and imperial , and applies them to
8217-439: The relevant jurisdiction's name. (In countries using systems of government derived from Roman civil law , the state is the equivalent concept. ) However, the terms the sovereign or monarch and the Crown , though related, have different meanings: The Crown includes both the monarch and the government. The institution and powers of the Crown are formally vested in the king, but, conventionally , its functions are exercised in
8316-529: The roads leading up to the bridge. The bridge was officially opened at 4 p.m. on December 24, 1915. It was then known as the Q Street Bridge. The bridge was lit by incandescent lamps. The Commissioners of the District of Columbia officially gave it the name of Dumbarton Bridge on June 5, 1916. According to the Commissioners' written statement, "Dumbarton bridge commemorates the name of the tract of land upon which
8415-742: The roadways and reduced movement of the upper level when the lower level was installed three decades after the upper level. The Tsing Ma Bridge and Kap Shui Mun Bridge in Hong Kong have six lanes on their upper decks, and on their lower decks there are two lanes and a pair of tracks for MTR metro trains. Some double-decked bridges only use one level for street traffic; the Washington Avenue Bridge in Minneapolis reserves its lower level for automobile and light rail traffic and its upper level for pedestrian and bicycle traffic (predominantly students at
8514-398: The ruler. Land, for instance, was granted by the Crown to lords in exchange for feudal services and they, in turn, granted the land to lesser lords. One exception to this was common socage : owners of land held as socage held it subject only to the crown. When such lands become ownerless, they are said to escheat ; i.e. return to direct ownership of the Crown ( Crown land ). Bona vacantia
8613-698: The same year, has the span of 90 m (295 ft) and crosses the valley of the Syrabach River. The difference between the two is that the Solkan Bridge was built from stone blocks, whereas the Friedensbrücke was built from a mixture of crushed stone and cement mortar. The world's largest arch bridge is the Chaotianmen Bridge over the Yangtze River with a length of 1,741 m (5,712 ft) and
8712-637: The simplest and oldest type of bridge in use today, and are a popular type. Some cantilever bridges also have a smaller beam connecting the two cantilevers, for extra strength. The largest cantilever bridge is the 549-metre (1,801 ft) Quebec Bridge in Quebec, Canada. With the span of 220 metres (720 ft), the Solkan Bridge over the Soča River at Solkan in Slovenia is the second-largest stone bridge in
8811-522: The sovereign's name by ministers of the Crown drawn from and responsible to the elected chamber of parliament . Still, the king or queen is the employer of all government officials and staff (including the viceroys , judges, members of the armed forces, police officers, and parliamentarians), the guardian of foster children ( Crown wards ), as well as the owner of all state lands ( Crown land ), buildings and equipment (Crown property), state-owned companies (Crown corporations or Crown entities ), and
8910-416: The term the Crown , at its broadest, now means the government or the polity known as the state , while the sovereign in all realms is the living embodiment of the state, or symbolic personification of the Crown. The body of the reigning sovereign thus holds two distinct personas in constant coexistence, an ancient theory of the "King's two bodies"—the body natural (subject to infirmity and death) and
9009-740: The undertimbers of bridges all around the world are spots of prevalent graffiti. Some bridges attract people attempting suicide, and become known as suicide bridges . The materials used to build the structure are also used to categorize bridges. Until the end of the 18th century, bridges were made out of timber, stone and masonry. Modern bridges are currently built in concrete, steel, fiber reinforced polymers (FRP), stainless steel or combinations of those materials. Living bridges have been constructed of live plants such as Ficus elastica tree roots in India and wisteria vines in Japan. Unlike buildings whose design
9108-433: The weld transitions . This results in a potential high benefit, using existing bridges far beyond the planned lifetime. While the response of a bridge to the applied loading is well understood, the applied traffic loading itself is still the subject of research. This is a statistical problem as loading is highly variable, particularly for road bridges. Load Effects in bridges (stresses, bending moments) are designed for using
9207-481: The word bridge to an Old English word brycg , of the same meaning. The Oxford English Dictionary also notes that there is some suggestion that the word can be traced directly back to Proto-Indo-European *bʰrēw-. However, they also note that "this poses semantic problems." The origin of the word for the card game of the same name is unknown. The simplest and earliest types of bridges were stepping stones . Neolithic people also built
9306-448: The world and the longest railroad stone bridge. It was completed in 1905. Its arch, which was constructed from over 5,000 tonnes (4,900 long tons; 5,500 short tons) of stone blocks in just 18 days, is the second-largest stone arch in the world, surpassed only by the Friedensbrücke (Syratalviadukt) in Plauen , and the largest railroad stone arch. The arch of the Friedensbrücke, which was built in
9405-582: Was by Daniel B. Luten . The bridge is significant as showing the impact of the City Beautiful movement in Washington and the association of architects, engineers and sculptors with the city's new Commission of Fine Arts. The architects studied photographs of bridges around the world choosing as models a Roman aqueduct and a mountain bridge in Italy with intent to set a precedent for further city bridges. The color of
9504-468: Was completed. Legislation to fund the bridge's construction was introduced to Congress in December 1910, and Congress approved it two months later. Congress appropriated $ 275,000 to build the bridge and $ 75,000 to condemn property, including a land west of Rock Creek being used as a street car yard, in order to extend Q Street to the bridge. The bridge's design was by Glenn Brown , and the engineering design
9603-460: Was laid out the easterly part of Georgetown, and to which Ninian Beall received letters patent from the British crown ." The Dumbarton Bridge was added to the National Register of Historic Places on July 16, 1973. Bridge A bridge is a structure built to span a physical obstacle (such as a body of water , valley , road, or railway) without blocking the path underneath. It
9702-470: Was to divert the water of Rock Creek through a tunnel under current-day 27th Street NW, then fill in Rock Creek's beds, and extend Georgetown's streets to Washington. Many Georgetown residents disliked Rock Creek because it was filled with stagnant water and trash. The cost of diverting and filling in the creek was estimated to be $ 4.5 million. Estimates to build the bridge ranged from $ 150,000 to $ 200,000, while
9801-665: Was visible in India by about the 4th century. A number of bridges, both for military and commercial purposes, were constructed by the Mughal administration in India. Although large bridges of wooden construction existed in China at the time of the Warring States period , the oldest surviving stone bridge in China is the Zhaozhou Bridge , built from 595 to 605 AD during the Sui dynasty . This bridge
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