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Falsework
Falsework consists of temporary structures used in construction to support a permanent structure until its construction is sufficiently advanced to support itself. For arches, this is specifically called centering. Falsework includes temporary support structures for formwork used to mold concreteHardie G.M. (1995) Building Construction: Principles, Practices, and Materials. New Jersey: Prentice Hall. (Pg 116, paragraph 1) in the construction of buildings, bridges, and elevated roadways. The British Standards of practice for falsework, BS 5975:2008, defines falsework as "Any temporary structure used to support a permanent structure while it is not self-supporting." History Falsework has been employed in bridge and viaduct construction since ancient times. The Romans were renowned for its use, as at the Limyra Bridge in Turkey. Until the turn of the 20th century almost all falsework was constructed from timber. To compensate for timber shortages in different regions and to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eastern Span Replacement Of The San Francisco–Oakland Bay Bridge
The eastern span replacement of the San Francisco–Oakland Bay Bridge was a construction project to replace a seismically unsound portion of the San Francisco-Oakland Bay Bridge, Bay Bridge with a new self-anchored suspension bridge (SAS) and a pair of viaducts. The bridge is in the U.S. state of California and crosses the San Francisco Bay between Yerba Buena Island and Oakland, California, Oakland. The span replacement took place between 2002 and 2013, and is the most expensive public works project in California history, with a final price tag of $6.5 billion, a 2,500% increase from the original estimate of $250 million, which was an ''initial'' estimate for a seismic retrofit of the span, not the full span replacement ultimately completed. Originally scheduled to open in 2007, several problems delayed the opening until September 2, 2013. With a width of , comprising 10 general-purpose lanes, it is the world's widest bridge according to Guinness World Records. The ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limyra Bridge
The Bridge near Limyra (in , "Bridge of the Forty Arches") is a late Roman bridge in Lycia, in modern south-west Turkey, and one of the oldest segmented arch bridges in the world. Located near the ancient city of Limyra, it is the largest civil engineering structure of antiquity in the region, spanning the Alakır Çayı river over a length of on 26 segmental arches. These arches, with a span-to-rise ratio of 5.3:1, give the bridge an unusually flat profile, and were unsurpassed as an architectural achievement until the late Middle Ages. Today, the structure is largely buried by river sediments and surrounded by greenhouses. Despite its unique features, the bridge remains relatively unknown, and only in the 1970s did researchers from the Istanbul branch of the German Archaeological Institute carry out field examinations on the site. Field examinations No information on the bridge survives from ancient sources. The first descriptions appear in European travellers' account ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch Bridge
An arch bridge is a bridge with abutments at each end shaped as a curved arch. Arch bridges work by transferring the weight of the bridge and its structural load, loads partially into a horizontal thrust restrained by the abutments at either side, and partially into a vertical load on the arch supports. A viaduct (a long bridge) may be made from a series of arches, although other more economical structures are typically used today. History Possibly the oldest existing arch bridge is the Mycenaean Greece, Mycenaean Arkadiko Bridge in Greece from about 1300 BC. The stone corbel arch bridge is still used by the local populace. The well-preserved Hellenistic Eleutherna Bridge has a triangular corbel arch. The 4th century BC Rhodes Footbridge rests on an early voussoir arch. Although true arches were already known by the Etruscans and ancient Greeks, the Ancient Rome, Romans were – as with the Vault (architecture), vault and the dome – the first to fully realize the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Self-anchored Suspension Bridge
A self-anchored suspension bridge is a suspension bridge type in which the main cables attach to the ends of the deck, rather than directly to the ground or via large anchorages. The design is well-suited for construction atop elevated piers, or in areas of unstable soils where anchorages would be difficult to construct. File:Bridge-suspension-anchorages.svg, Suspension bridge with the main cables attached to the ground (black squares) File:Bridge-self-anchored.svg, Self-anchored suspension bridge; the main cables are attached to the end of the road deck (horizontal blue line) The load path of the self-anchored suspension (SAS) bridge converts vertical loads into tension forces in the main cables which are countered by compressive forces in the towers and deck. The system balances forces internally without external anchorage requirements, making it suitable for sites where large horizontal forces are difficult to anchor. This is similar to the method used in a tied-arch bridge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formwork
Formwork is Molding (process), molds into which concrete or similar materials are either precast concrete, precast or cast-in-place concrete, cast-in-place. In the context of concrete construction, the falsework supports the shuttering molds. In specialty applications formwork may be permanently incorporated into the final structure, adding insulation or helping reinforce the finished structure. Types Formwork may be made of wood, metal, plastic, or composite materials: #''Traditional timber formwork''. The formwork is built on site out of timber and plywood or moisture-resistant particleboard. It is easy to produce but time-consuming for larger structures, and the plywood facing has a relatively short lifespan. It is still used extensively where the labour costs are lower than the costs for procuring reusable formwork. It is also the most flexible type of formwork, so even where other systems are in use, complicated sections may use it. #''Engineered Formwork System''. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scaffolding
Scaffolding, also called scaffold or staging, is a temporary structure used to support a work crew and materials to aid in the construction, maintenance and repair of buildings, bridges and all other human-made structures. Scaffolds are widely used on site to get access to heights and areas that would be otherwise hard to get to. Unsafe scaffolding has the potential to result in death or serious injury. Scaffolding is also used in adapted forms for formwork and shoring, grandstand seating, concert stages, access/viewing towers, exhibition stands, ski ramps, half pipes and art projects. There are six main types of scaffolding used worldwide today. These are tube and coupler (fitting) components, prefabricated modular system scaffold components, H-frame / façade modular system scaffolds, suspended scaffolds, timber scaffolds and bamboo scaffolds (particularly in China, India and Hong Kong). Each type is made from several components which often include: * A base jack or plate whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Centering
Centring, centre, centering"Centering 2, Centring 2" def. 1. Whitney, William Dwight, and Benjamin E. Smith. ''The Century dictionary and cyclopedia''. vol. 2. New York: Century Co., 1901. p. 885., or center is a type of falsework: the temporary structure upon which the stones of an arch or vault are laid during construction. Until the keystone is inserted an arch has no strength and needs the centring to keep the voussoirs in their correct relative positions. A simple centring without a truss is called a common centring. A cross piece connecting centring frames is called a lag or bolst.Ching, Frank (1995). ''A visual dictionary of architecture''. New York: Van Nostrand Reinhold. p. 3. . Centring is normally made of wood timbers, a relatively straightforward structure in a simple arch or vault; but with more complex shapes involving double curvature, such as a dome or the bottle-shaped flue in a Norman-period kitchen, clay or sand bound by a weak lime mortar would be used. Shap ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Burbank Ave I-5 Overpass Under Construction In Burbank, California
Burbank may refer to: Places Australia * Burbank, Queensland, a suburb in Brisbane United States * Burbank, California, a city in Los Angeles County * Burbank, Santa Clara County, California, a census-designated place * Burbank, Illinois, a city * Burbank Township, Kandiyohi County, Minnesota * Burbank, Missouri, an unincorporated community * Burbank, Ohio, a village * Burbank, Oklahoma, a town * Burbank, South Dakota, an unincorporated community * Burbank, Utah, an unincorporated community * Burbank Hills, Utah, a small mountain range * Burbank, Washington, a census-designated place Schools * Burbank High School (other) * Luther Burbank Middle School (other) * Burbank Elementary School (other) People and fictional characters * Burbank (surname) Other * Russet Burbank potato, named after Luther Burbank * Burbank station (DART) Burbank station is a DART light rail station located near Dallas Love Field airport for service on the and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Construction Methods
The list of construction methods covers the processes and techniques used in the construction process. The construction method is essential for civil engineers; utilizing it appropriately can help to achieve the desired results. The term ''building'' refers to the creation of physical structures such as buildings, bridges or railways. One of the four types of buildings is residential and building methods are easiest to study in these structures. Background Construction involves the creation of physical structures such as buildings, bridges or railways. Bricks are small rectangular blocks that can be used to form parts of buildings, typically walls. Before 7,000 BC, bricks were formed from hand-molded mud and dried by the sun. During the Industrial Revolution, mass-produced bricks became a common alternative to stone. Stone was typically more expensive, less predictable and more difficult to handle. Bricks remain in common use. They are small and easy to handle, strong in compress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sixth Street Viaduct
The Sixth Street Viaduct, also known as the Sixth Street Bridge, is a viaduct bridge that connects the Arts District in Downtown Los Angeles with the Boyle Heights neighborhood. The Sixth Street Viaduct spans the Los Angeles River, the Santa Ana Freeway (US 101), and the Golden State Freeway ( I-5), as well as Metrolink ( Orange County and 91/Perris Valley lines), Amtrak (''Pacific Surfliner'' and ''Southwest Chief''), and Union Pacific (along with Metrolink's Riverside Line) railroad tracks and several local streets. The first incarnation, which opened in 1932 and demolished in 2016, was replaced with the second incarnation in 2022. The predecessor was composed of three independent structures: the reinforced concrete west segment, the central steel arch segment over the river, and the reinforced concrete east segment. In 1986, the Caltrans bridge survey found the Sixth Street Viaduct eligible for inclusion in the National Register of Historic Places. The demolition of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sixth Street Falsework - Bent 11 Jump Span
Sixth is the ordinal form of the number six. * The Sixth Amendment, to the U.S. Constitution * A keg of beer, equal to 5 U.S. gallons or barrel * The fraction Music * Sixth interval (music)s: ** major sixth, a musical interval ** minor sixth, a musical interval ** diminished sixth, an interval produced by narrowing a minor sixth by a chromatic semitone ** augmented sixth, an interval produced by widening a major sixth by a chromatic semitone * Sixth chord, two different kinds of chord * Submediant, sixth degree of the diatonic scale * Landini sixth, a type of cadence * Sixth (interval) Other uses * ''The Sixth'' (1981 film), a Soviet film directed by Samvel Gasparov * ''The Sixth'' (2024 film), an American documentary film directed by Andrea Nix Fine and Sean Fine * The 6ths, a band created by Stephin Merritt * LaSexta La Sexta (; ; stylised as laSexta) is a privately owned Spanish free-to-air television channel that was founded on 18 March 2001 as Beca TV and began br ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arch Ring And Falsework, 1932 (5791715869)
An arch is a curved vertical structure spanning an open space underneath it. Arches may support the load above them, or they may perform a purely decorative role. As a decorative element, the arch dates back to the 4th millennium BC, but structural load-bearing arches became popular only after their adoption by the Ancient Romans in the 4th century BC. Arch-like structures can be horizontal, like an arch dam that withstands the horizontal hydrostatic pressure load. Arches are usually used as supports for many types of vaults, with the barrel vault in particular being a continuous arch. Extensive use of arches and vaults characterizes an arcuated construction, as opposed to the trabeated system, where, like in the architectures of ancient Greece, China, and Japan (as well as the modern steel-framed technique), posts and beams dominate. Arches had several advantages over the lintel, especially in the masonry construction: with the same amount of material it can have l ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
