105-661: The Dan Cameron Bridge is a four-lane automobile bridge spanning the Northeast Cape Fear River and US 421 , located in New Hanover County . The bridge carries I-140 and is named after Dan Cameron, who was a successful civic leader, businessman and one-term mayor of Wilmington from 1955 to 1957. This article about a bridge in North Carolina is a stub . You can help Misplaced Pages by expanding it . Bridge A bridge
210-600: 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
315-611: A carnelian bead identified with the Middle Kingdom pharaoh Senusret I , whose reign is dated to 1971–1926 BC. A stela and a statuette of the Egyptian pharaohs Senusret III and Amenemhet III have also been found. However, it is unclear when they first arrived at Ugarit. In the Amarna letters , messages from Ugarit c. 1350 BC written by Ammittamru I , Niqmaddu II , and his queen have been discovered. From
420-636: A "dark period" in ancient Egyptian history, spanned about 100 years after the end of the Old Kingdom from about 2181 to 2055 BC. Very little monumental evidence survives from this period, especially from the early part of it. The First Intermediate Period was a dynamic time when the rule of Egypt was roughly divided between two areas: Heracleopolis in Lower Egypt and Thebes in Upper Egypt. These two kingdoms eventually came into conflict, and
525-578: A 3rd-millennium BC culture postulated based on a collection of artefacts confiscated in 2001. In modern scholarship, the chronology of the Bronze Age Levant is divided into: The term Neo-Syria is used to designate the early Iron Age . The old Syrian period was dominated by the Eblaite first kingdom , Nagar and the Mariote second kingdom . The Akkadians conquered large areas of
630-525: 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
735-471: 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
840-480: 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
945-399: 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
1050-606: 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
1155-737: A global era, the Bronze Age follows the Neolithic , with a transition period between the two known as the Chalcolithic . The final decades of the Bronze Age in the Mediterranean basin are often characterised as a period of widespread societal collapse known as the Late Bronze Age collapse ( c. 1200 – c. 1150 BC ), although its severity and scope is debated among scholars. An ancient civilisation
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#17328012067681260-402: A permanence not enjoyed by manuscripts. These inscriptions can commonly be subdivided into four parts: a reference to the date and place, the naming of the event commemorated, the list of gifts given to the artisan in exchange for the bronze, and a dedication. The relative points of reference these vessels provide have enabled historians to place most of the vessels within a certain time frame of
1365-579: A power vacuum in Mesopotamia. At its beginning, Mitanni's major rival was Egypt under the Thutmosids . However, with the ascent of the Hittite empire, Mitanni and Egypt allied to protect their mutual interests from the threat of Hittite domination. At the height of its power during the 14th century BC, Mitanni had outposts centred on its capital, Washukanni , which archaeologists have located on
1470-561: A simple type of suspension bridge , were used by 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
1575-481: A small administrative town) appears on a tablet from the reign of Sargon of Akkad in the 23rd century BC. The Amorite dynasty established the city-state of Babylon in the 19th century BC. Over a century later, it briefly took over the other city-states and formed the short-lived First Babylonian Empire during what is also called the Old Babylonian Period . Akkad, Assyria, and Babylonia used
1680-593: 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
1785-749: 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
1890-489: 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
1995-462: 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
2100-469: 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 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
2205-580: Is an argument to be made that the Bronze Age never properly ended in China, as there is no recognisable transition to an Iron Age. Together with the jade art that precedes it, bronze was seen as a fine material for ritual art when compared with iron or stone. Bronze metallurgy in China originated in what is referred to as the Erlitou period, which some historians argue places it within the Shang. Others believe
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#17328012067682310-588: 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
2415-576: Is called the Bactria–Margiana Archaeological Complex . The Kulli culture , similar to that of the Indus Valley Civilisation , was located in southern Balochistan (Gedrosia) c. 2500–2000 BC . The economy was agricultural. Dams were found in several places, providing evidence for a highly developed water management system. Konar Sandal is associated with the hypothesized Jiroft culture ,
2520-662: Is conjectured to have been associated with the sudden arrival of the Sea Peoples , the kingdom disintegrated into several independent "Neo-Hittite" city-states, some of which survived into the 8th century BC. Arzawa , in Western Anatolia, during the second half of the 2nd millennium BC, likely extended along southern Anatolia in a belt from near the Turkish Lakes region to the Aegean coast. Arzawa
2625-480: Is deemed to be part of the Bronze Age if it either produced bronze by smelting its own copper and alloying it with tin , arsenic , or other metals, or traded other items for bronze from producing areas elsewhere. Bronze Age cultures were the first to develop writing . According to archaeological evidence, cultures in Mesopotamia , which used cuneiform script, and Egypt , which used hieroglyphs , developed
2730-496: 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
2835-526: Is further conjectured that the same migrations spread the Uralic group of languages across Europe and Asia, with extant members of the family including Hungarian , Finnish and Estonian . In China, the earliest bronze artefacts have been found in the Majiayao culture site (3100–2700 BC). The term "Bronze Age" has been transferred to the archaeology of China from that of Western Eurasia, and there
2940-417: 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
3045-599: Is named after the Korean name for undecorated or plain cooking and storage vessels that form a large part of the pottery assemblage over the entire length of the period, but especially between 850 and 550 BC. The Mumun period is known for the origins of intensive agriculture and complex societies in both the Korean Peninsula and the Japanese Archipelago. The Middle Mumun pottery period culture of
3150-540: 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
3255-523: Is no consensus or universally used convention delimiting the "Bronze Age" in the context of Chinese prehistory . The "Early Bronze Age" in China is sometimes taken to be coterminous with the reign of the Shang dynasty (16th–11th centuries BC), and the Later Bronze Age with the subsequent Zhou dynasty (11th–3rd centuries BC), from the 5th century, called Iron Age China although there
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3360-737: 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
3465-642: The Hellenistic era can be found in the Peloponnese. The greatest bridge builders of antiquity were 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
3570-754: The Iranian plateau , centred in Anshan . From the mid-2nd millennium BC, Elam was centred in Susa in the Khuzestan lowlands. Its culture played a crucial role in both the Gutian Empire and the Iranian Achaemenid dynasty that succeeded it. The Oxus civilisation was a Bronze Age Central Asian culture dated c. 2300–1700 BC and centred on the upper Amu Darya ( a.k.a. ). In
3675-529: The Kassite period c. 1500 – c. 1155 BC ). The usual tripartite division into an Early, Middle and Late Bronze Age is not used in the context of Mesopotamia. Instead, a division primarily based on art and historical characteristics is more common. The cities of the Ancient Near East housed several tens of thousands of people. Ur , Kish , Isin , Larsa , and Nippur in
3780-586: The Majiayao site in Gansu rather than at Xinjiang . The production of Erlitou represents the earliest large-scale metallurgy industry in the Central Plains of China. The influence of the Saima-Turbino metalworking tradition from the north is supported by a series of recent discoveries in China of many unique perforated spearheads with downward hooks and small loops on the same or opposite side of
3885-864: 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,
3990-504: 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
4095-577: The southern Levant in cities such as Hazor , Jericho , and Beit She'an . The Hittite Empire was established during the 18th century BC in Hattusa , northern Anatolia . At its height in the 14th century BC, the Hittite Kingdom encompassed central Anatolia, southwestern Syria as far as Ugarit , and upper Mesopotamia . After 1180 BC, amid general turmoil in the Levant , which
4200-422: The 16th to the 13th century BC, Ugarit remained in constant contact with Egypt and Cyprus ( Alashiya ). Mitanni was a loosely organised state in northern Syria and south-east Anatolia, emerging c. 1500–1300 BC . Founded by an Indo-Aryan ruling class that governed a predominantly Hurrian population, Mitanni came to be a regional power after the Hittite destruction of Kassite Babylon created
4305-523: 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
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4410-430: The 3rd millennium BC. The Bronze Age is characterised by the widespread use of bronze , though the introduction and development of bronze technology were not universally synchronous. Tin bronze technology requires systematic techniques: tin must be mined (mainly as the tin ore cassiterite ) and smelted separately, then added to hot copper to make bronze alloy. The Bronze Age was a time of extensive use of metals and
4515-776: The 6th century BC attests to knowledge of iron smelting, yet bronze continues to occupy the seat of significance in the archaeological and historical record for some time after this. W. C. White argues that iron did not supplant bronze "at any period before the end of the Zhou dynasty (256 BC)" and that bronze vessels make up the majority of metal vessels through the Eastern Han period , or to 221 BC. The Chinese bronze artefacts generally are either utilitarian, like spear points or adze heads, or "ritual bronzes" , which are more elaborate versions in precious materials of everyday vessels, as well as tools and weapons. Examples are
4620-510: The BMAC had close international relations with the Indus Valley , the Iranian plateau , and possibly even indirectly with Mesopotamia. All civilisations were familiar with lost wax casting . According to a 2019 study, the BMAC was not a primary contributor to later South-Asian genetics. The Altai Mountains , in what is now southern Russia and central Mongolia , have been identified as
4725-666: The Bronze Age began in the Protodynastic Period c. 3150 BC . The archaic Early Bronze Age of Egypt , known as the Early Dynastic Period of Egypt , immediately followed the unification of Lower and Upper Egypt, c. 3100 BC . It is generally taken to include the First and Second dynasties, lasting from the Protodynastic Period until c. 2686 BC , or
4830-599: The Early Bronze Age, the culture of the Kopet Dag oases and Altyndepe developed a proto-urban society. This corresponds to level IV at Namazga-Tepe . Altyndepe was a major centre even then. Pottery was wheel-turned. Grapes were grown. The height of this urban development was reached in the Middle Bronze Age c. 2300 BC , corresponding to level V at Namazga-Depe. This Bronze Age culture
4935-533: The Erlitou sites belong to the preceding Xia dynasty . The United States National Gallery of Art defines the Chinese Bronze Age as c. 2000 – c. 771 BC , a period that begins with the Erlitou culture and ends abruptly with the disintegration of Western Zhou rule. There is reason to believe that bronze work developed inside of China apart from outside influence. However,
5040-641: The Levant and were followed by the Amorite kingdoms , c. 2000–1600 BC , which arose in Mari , Yamhad , Qatna , and Assyria . From the 15th century BC onward, the term Amurru is usually applied to the region extending north of Canaan as far as Kadesh on the Orontes River . The earliest-known contact of Ugarit with Egypt (and the first exact dating of Ugaritic civilisation) comes from
5145-469: The Middle Bronze Age and Babylon , Calah , and Assur in the Late Bronze Age similarly had large populations. The Akkadian Empire (2335–2154 BC) became the dominant power in the region. After its fall, the Sumerians enjoyed a renaissance with the Neo-Sumerian Empire . Assyria , along with the Old Assyrian Empire ( c. 1800–1600 BC ), became a regional power under the Amorite king Shamshi-Adad I . The earliest mention of Babylon (then
5250-411: The Middle Kingdom. During the Second Intermediate Period , Ancient Egypt fell into disarray a second time between the end of the Middle Kingdom and the start of the New Kingdom, best known for the Hyksos , whose reign comprised the Fifteenth and Sixteenth dynasties. The Hyksos first appeared in Egypt during the Eleventh Dynasty, began their climb to power in the Thirteenth Dynasty, and emerged from
5355-401: The Osiris funerary cult rose to dominate popular Ancient Egyptian religion . The period comprises two phases: the Eleventh Dynasty, which ruled from Thebes, and the Twelfth and Thirteenth dynasties, centred on el-Lisht . The unified kingdom was previously considered to comprise the Eleventh and Twelfth Dynasties, but historians now consider part of the Thirteenth Dynasty to have belonged to
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#17328012067685460-417: The Second Intermediate Period in control of Avaris and the Nile Delta . By the Fifteenth Dynasty, they ruled lower Egypt. They were expelled at the end of the Seventeenth Dynasty . The New Kingdom of Egypt , also referred to as the Egyptian Empire, existed during the 16th–11th centuries BC. The New Kingdom followed the Second Intermediate Period and was succeeded by the Third Intermediate Period . It
5565-481: The Theban kings conquered the north, reunifying Egypt under a single ruler during the second part of the Eleventh Dynasty . The Bronze Age in Nubia started as early as 2300 BC. Egyptians introduced copper smelting to the Nubian city of Meroë in present-day Sudan c. 2600 BC . A furnace for bronze casting found in Kerma has been dated to 2300–1900 BC. The Middle Kingdom of Egypt spanned between 2055 and 1650 BC. During this period,
5670-503: The Western Zhou period, allowing them to trace the evolution of the vessels and the events they record. The Japanese archipelago saw the introduction of bronze during the early Yayoi period ( c. 300 BC ), which saw the introduction of metalworking and agricultural practices brought by settlers arriving from the continent. Bronze and iron smelting spread to the Japanese archipelago through contact with other ancient East Asian civilisations, particularly immigration and trade from
5775-445: The ancient Korean peninsula, and ancient mainland China. Iron was mainly used for agricultural and other tools, whereas ritual and ceremonial artefacts were mainly made of bronze. On the Korean Peninsula, the Bronze Age began c. 1000–800 BC . Initially centred around Liaoning and southern Manchuria, Korean Bronze Age culture exhibits unique typology and styles, especially in ritual objects. The Mumun pottery period
5880-496: 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,
5985-416: 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
6090-596: 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
6195-422: The beginning of the Old Kingdom . With the First Dynasty, the capital moved from Abydos to Memphis with a unified Egypt ruled by an Egyptian god-king. Abydos remained the major holy land in the south. The hallmarks of ancient Egyptian civilisation, such as art, architecture and religion, took shape in the Early Dynastic Period. Memphis , in the Early Bronze Age, was the largest city of the time. The Old Kingdom of
6300-437: 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
6405-428: The bridge. Bronze Age The Bronze Age ( c. 3300 – c. 1200 BC ) was a historical period characterised principally by the use of bronze tools and the development of complex urban societies, as well as the adoption of writing in some areas. The Bronze Age is the middle principal period of the three-age system , following the Stone Age and preceding the Iron Age . Conceived as
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#17328012067686510-439: 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
6615-467: 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
6720-425: The development of trade networks. A 2013 report suggests that the earliest tin-alloy bronze was a foil dated to the mid-5th millennium BC from a Vinča culture site in Pločnik , Serbia , although this culture is not conventionally considered part of the Bronze Age; however, the dating of the foil has been disputed. West Asia and the Near East were the first regions to enter the Bronze Age, beginning with
6825-444: The discovery of the Europoid Tarim mummies in Xinjiang has caused some archaeologists such as Johan Gunnar Andersson , Jan Romgard, and An Zhimin to suggest a possible route of transmission from the West eastwards. According to An Zhimin, "It can be imagined that initially, bronze and iron technology took its rise in West Asia, first influenced the Xinjiang region, and then reached the Yellow River valley, providing external impetus for
6930-416: The earliest practical writing systems. Bronze Age civilisations gained a technological advantage due to bronze's harder and more durable properties than other metals available at the time. While terrestrial iron is naturally abundant, the higher temperature required for smelting, 1,250 °C (2,280 °F), in addition to the greater difficulty of working with it, placed it out of reach of common use until
7035-458: The end of the 2nd millennium BC. Tin's lower melting point of 232 °C (450 °F) and copper's moderate melting point of 1,085 °C (1,985 °F) placed both these metals within the capabilities of Neolithic pottery kilns , which date to 6000 BC and were able to produce temperatures of at least 900 °C (1,650 °F). Copper and tin ores are rare since there were no tin bronzes in West Asia before trading in bronze began in
7140-471: The fall of the monarchy. The name "Israel" first appears c. 1209 BC , at the end of the Late Bronze Age and the very beginning of the Iron Age, on the Merneptah Stele raised by the Egyptian pharaoh Merneptah . The Arameans were a Northwest Semitic semi-nomadic pastoral people who originated in what is now modern Syria (Biblical Aram ) during the Late Bronze and early Iron Age. Large groups migrated to Mesopotamia, where they intermingled with
7245-422: The first human-made bridges with significant span were probably intentionally felled trees. Among 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
7350-401: The function of the bridge, the nature of the terrain where the bridge is constructed and anchored, 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
7455-428: The headwaters of the Khabur River . Eventually, Mitanni succumbed to the Hittites and later Assyrian attacks, eventually being reduced to a province of the Middle Assyrian Empire . The Israelites were an ancient Semitic-speaking people of the Ancient Near East who inhabited part of Canaan during the tribal and monarchic periods (15th–6th centuries BC), and lived in the region in smaller numbers after
7560-781: 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
7665-470: The late 2nd century AD, when the Roman Empire built a 6-metre-wide (20 ft) wooden bridge to carry transport across 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
7770-427: 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,
7875-617: The native Akkadian (Assyrian and Babylonian) population. The Aramaeans never had a unified empire; they were divided into independent kingdoms all across the Near East. After the Bronze Age collapse, their political influence was confined to Syro-Hittite states, which were entirely absorbed into the Neo-Assyrian Empire by the 8th century BC. The Mesopotamian Bronze Age began c. 3500 BC and ended with
7980-408: The numerous large sacrificial tripods known as dings ; there are many other distinct shapes. Surviving identified Chinese ritual bronzes tend to be highly decorated, often with the taotie motif, which involves stylised animal faces. These appear in three main motif types: those of demons, symbolic animals, and abstract symbols. Many large bronzes also bear cast inscriptions that are the bulk of
8085-416: The oldest arch bridges in existence and use. The Oxford English Dictionary traces the origin of 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
8190-698: The origins of agriculture. Foothill regions and glacial melt streams supported Bronze Age agro-pastoralists who developed complex east–west trade routes between Central Asia and China that introduced wheat and barley to China and millet to Central Asia. The Bactria–Margiana Archaeological Complex (BMAC), also known as the Oxus civilisation, was a Bronze Age civilisation in Central Asia, dated c. 2400 – c. 1600 BC , located in present-day northern Afghanistan , eastern Turkmenistan , southern Uzbekistan and western Tajikistan , centred on
8295-629: 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
8400-588: The point of origin of a cultural enigma termed the Seima-Turbino Phenomenon . It is conjectured that changes in climate in this region c. 2000 BC }}, and the ensuing ecological, economic, and political changes, triggered a rapid and massive migration westward into northeast Europe, eastward into China, and southward into Vietnam and Thailand across a frontier of some 4,000 mi (6,000 km). This migration took place in just five to six generations and led to peoples from Finland in
8505-472: 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
8610-531: The region laid the foundations for astronomy , mathematics, and astrology . The following dates are approximate. The Bronze Age in the Near East can be divided into Early, Middle and Late periods. The dates and phases below apply solely to the Near East, not universally. However, some archaeologists propose a "high chronology", which extends periods such as the Intermediate Bronze Age by 300 to 500–600 years, based on material analysis of
8715-473: The regional Bronze Age is the name given to the period in the 3rd millennium BC when Egyptian civilisation attained its first continuous peak of complexity and achievement—the first of three "Kingdom" periods which marked the high points of civilisation in the lower Nile Valley (the others being the Middle Kingdom and New Kingdom ). The First Intermediate Period of Egypt , often described as
8820-654: The rise of the Mesopotamian civilisation of Sumer in the mid-4th millennium BC. Cultures in the ancient Near East practised intensive year-round agriculture; developed writing systems ; invented the potter's wheel , created centralised governments (usually in the form of hereditary monarchies ), formulated written law codes, developed city-states , nation-states and empires; embarked on advanced architectural projects; and introduced social stratification , economic and civil administration, slavery , and practised organised warfare, medicine, and religion. Societies in
8925-539: The rise of the Shang and Zhou civilizations." According to Jan Romgard, "bronze and iron tools seem to have traveled from west to east as well as the use of wheeled wagons and the domestication of the horse." There are also possible links to Seima-Turbino culture , "a transcultural complex across northern Eurasia", the Eurasian steppe, and the Urals. However, the oldest bronze objects found in China so far were discovered at
9030-763: 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
9135-734: 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
9240-653: 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
9345-706: The socket, which could be associated with the Seima-Turbino visual vocabulary of southern Siberia. The metallurgical centres of northwestern China, especially the Qijia culture in Gansu and Longshan culture in Shaanxi , played an intermediary role in this process. Iron use in China dates as early as the Zhou dynasty ( c. 1046 – 256 BC), but remained minimal. Chinese literature authored during
9450-517: The southern Korean Peninsula gradually adopted bronze production ( c. 700–600 BC ) after a period when Liaoning-style bronze daggers and other bronze artefacts were exchanged as far as the interior part of the Southern Peninsula ( c. 900–700 BC ). The bronze daggers lent prestige and authority to the personages who wielded and were buried with them in high-status megalithic burials at south-coastal centres such as
9555-474: The surviving body of early Chinese writing and have helped historians and archaeologists piece together the history of China, especially during the Zhou dynasty. The bronzes of the Western Zhou document large portions of history not found in the extant texts that were often composed by persons of varying rank and possibly even social class. Further, the medium of cast bronze lends the record they preserve
9660-767: 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 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 ,
9765-748: 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
9870-570: The upper Amu Darya (Oxus River). Its sites were discovered and named by the Soviet archaeologist Viktor Sarianidi (1976). Bactria was the Greek name for the area of Bactra (modern Balkh ), in what is now northern Afghanistan, and Margiana was the Greek name for the Persian satrapy of Marguš , the capital of which was Merv in present-day Turkmenistan. A wealth of information indicates that
9975-517: 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 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
10080-433: 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
10185-403: The west to Thailand in the east employing the same metalworking technology and, in some areas, horse breeding and riding. However, recent genetic testings of sites in south Siberia and Kazakhstan ( Andronovo horizon) would rather support spreading of the bronze technology via Indo-European migrations eastwards, as this technology had been well known for quite a while in western regions. It
10290-649: 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 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
10395-452: 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
10500-535: The written East Semitic Akkadian language for official use and as a spoken language. By that time, the Sumerian language was no longer spoken, but was still in religious use in Assyria and Babylonia, and would remain so until the 1st century AD. The Akkadian and Sumerian traditions played a major role in later Assyrian and Babylonian culture. Despite this, Babylonia, unlike the more militarily powerful Assyria,
10605-513: Was Egypt's most prosperous time and marked the peak of Egypt's power. The later New Kingdom, comprising the Nineteenth and Twentieth dynasties (1292–1069 BC), is also known as the Ramesside period , after the eleven pharaohs who took the name of Ramesses. Elam was a pre-Iranian ancient civilisation located east of Mesopotamia. In the Middle Bronze Age, Elam consisted of kingdoms on
10710-466: Was founded by non-native Amorites and often ruled by other non-indigenous peoples such as the Kassites , Aramaeans and Chaldeans , as well as by its Assyrian neighbours. For many decades, scholars made superficial reference to Central Asia as the "pastoral realm" or alternatively, the "nomadic world", in what researchers call the "Central Asian void": a 5,000-year span that was neglected in studies of
10815-646: Was opened; it is also the longest wooden bridge in Switzerland. The Arkadiko Bridge is one of four Mycenaean corbel arch bridges part of 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
10920-514: 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 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
11025-583: Was the western neighbour of the Middle and New Hittite Kingdoms , at times a rival and, at other times, a vassal. The Assuwa league was a confederation of states in western Anatolia defeated by the Hittites under the earlier Tudhaliya I c. 1400 BC . Arzawa has been associated with the more obscure Assuwa generally located to its north. It probably bordered it, and may have been an alternative term for it during some periods. In Ancient Egypt ,
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