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Demolishing
Demolition (also known as razing and wrecking) is the science and engineering in safely and efficiently tearing down buildings and other artificial structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for reuse purposes. For small buildings, such as houses, that are only two or three stories high, demolition is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, cranes, excavators or bulldozers. Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods. Newer methods may use rotational hydraulic shears and silenced rockbreakers attached to excavators to cut or break through wood, steel, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wrecking Ball
A wrecking ball is a heavy steel ball, usually hung from a Crane (machine), crane, that is used for Demolition, demolishing large buildings. It was most commonly in use during the 1940s and 1950s. Several wrecking companies claim to have invented the wrecking ball. An early documented use was in the breaking up of the in 1888–1889, by Henry Bath and Co, at Rock Ferry on the River Mersey. In 1993, the wrecking ball was described as "one of the most common forms of large-scale coarse demolition." With the invention of Hydraulic excavator, hydraulic excavators and other machinery, the wrecking ball has become less common at demolition sites as its working efficiency is less than that of long reach excavators. Wrecking balls should be distinguished from overhaul hook balls, which although superficially similar looking, are different and serve a different purpose. Construction and design Modern wrecking balls have had a slight re-shaping, with the metal sphere changed into a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demolition Of An Old House In Argos, Greece
Demolition (also known as razing and wrecking) is the science and engineering in safely and efficiently tearing down buildings and other artificial structures. Demolition contrasts with deconstruction (building), deconstruction, which involves taking a building apart while carefully preserving valuable elements for reuse purposes. For small buildings, such as houses, that are only two or three stories high, demolition is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, cranes, excavators or bulldozers. Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a Crane (machine), crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods. Newer methods may use rotational hydraulic shears and silenced rockbreakers attached to excavat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Demolition Of Carlton Hotel, Sandown, IW, UK
Demolition (also known as razing and wrecking) is the science and engineering in safely and efficiently tearing down buildings and other artificial structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for reuse purposes. For small buildings, such as houses, that are only two or three stories high, demolition is a rather simple process. The building is pulled down either manually or mechanically using large hydraulic equipment: elevated work platforms, cranes, excavators or bulldozers. Larger buildings may require the use of a wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are especially effective against masonry, but are less easily controlled and often less efficient than other methods. Newer methods may use rotational hydraulic shears and silenced rockbreakers attached to excavators to cut or break through wood, steel, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
270 Park Avenue (1960–2021)
270 Park Avenue, also known as the JPMorgan Chase Tower and the Union Carbide Building, was a skyscraper in the Midtown Manhattan neighborhood of New York City. Built in 1960 for chemical company Union Carbide, it was designed by the architects Gordon Bunshaft and Natalie de Blois of Skidmore, Owings & Merrill (SOM). The 52-story, skyscraper later became the global headquarters for JPMorgan Chase. It was demolished in 2021 to make way for a taller skyscraper at the same address. At the time of its destruction, the Union Carbide Building was the tallest voluntarily demolished building in the world. The building occupied a full city block bounded by Madison Avenue, 48th Street, Park Avenue, and 47th Street. It was composed of two sections: a 52-story tower facing Park Avenue to the east and a 12-story annex facing Madison Avenue to the west, both surrounded by public plazas. About two-thirds of 270 Park Avenue was built atop two levels of underground railroad tracks, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
New York City
New York, often called New York City (NYC), is the most populous city in the United States, located at the southern tip of New York State on one of the world's largest natural harbors. The city comprises five boroughs, each coextensive with a respective county. The city is the geographical and demographic center of both the Northeast megalopolis and the New York metropolitan area, the largest metropolitan area in the United States by both population and urban area. New York is a global center of finance and commerce, culture, technology, entertainment and media, academics, and scientific output, the arts and fashion, and, as home to the headquarters of the United Nations, international diplomacy. With an estimated population in 2024 of 8,478,072 distributed over , the city is the most densely populated major city in the United States. New York City has more than double the population of Los Angeles, the nation's second-most populous city. [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Deconstruction (building)
In the context of physical construction, deconstruction is the selective dismantlement of building components, specifically for reuse, repurposing, recycling, and waste management. It differs from demolition where a site is cleared of its building by the most expedient means. Deconstruction has also been defined as "construction in reverse". Deconstruction requires a substantially higher degree of hands-on labor than does traditional demolition, but as such provides a viable platform for unskilled or unemployed workers to receive job skills training. The process of dismantling structures is an ancient activity that has been revived by the growing fields of sustainable and green building. When buildings reach the end of their useful life, they are typically demolished and hauled to landfills. Building implosions or ‘wrecking-ball’ style demolitions are relatively inexpensive and offer a quick method of clearing sites for new structures. On the other hand, these methods cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoe Ram
A breaker is a powerful percussion hammer fitted to an excavator for demolishing hard (rock or concrete) structures. It is powered by an auxiliary hydraulic system from the excavator, which is fitted with a foot-operated valve for this purpose. Additionally, demolition crews employ the hoe ram for jobs too large for jackhammering or areas where Rock blasting, blasting is not possible due to safety or environmental issues. Breakers are often referred to as "hammers", "peckers", "hoe rams" or "hoe rammers". These terms are popular and commonly used amongst construction/demolition workers. The first hydraulic breaker, Hydraulikhammer HM 400, was invented in 1967 by German company Krupp (today German company Atlas Copco) in Essen. Notable manufacturers See also * Excavator * Particulates References External links Info on hydraulic breaker repairs and maintenanceComprehensive Guide to Hydraulic Hammers Bibliography * Hydraulic tools Construction equipment German invent ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kajima Construction
is one of the oldest and largest construction companies in Japan. Founded in 1840, the company has its headquarters in Motoakasaka, Minato, Tokyo. The company is known for its DIB-200 proposal. The company stock is traded on four leading Japanese stock exchanges and is a constituent of the Nikkei 225 stock index. Kajima's services include design, engineering, construction, and real estate development. Kajima builds high-rise structures, railways, power plants, dams, and bridges. Its subsidiaries are located throughout Asia, Oceania, Europe, and North America. A downturn in the construction industry during the latter half of the 1990s prompted Kajima to expand its operations to the environmental sector, specifically waste treatment, water treatment, soil rehabilitation, and environmental consulting. History * 1840 - Iwakichi Kajima, the founder of the present-day company begins carpentry business in Edo (present day Tokyo) * 1860 - Kajima pioneers first western-style building ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asbestos Abatement
In construction, asbestos abatement is a set of procedures designed to control the release of Asbestos, asbestos fibers from asbestos-containing materials. Asbestos abatement is utilized during general construction in areas containing asbestos materials, particularly when those materials are being removed, encapsulated, or repaired. Abatement is needed in order to protect construction workers and members of the general public from the many negative Health impact of asbestos, health impacts of asbestos. Many residential and commercial buildings contain asbestos, used in spray-applied flame retardant, thermal system insulation, and in a variety of other materials. Asbestos can be Flocking (texture), flocked above false ceilings, inside technical ducts, and in many other small spaces where firefighters would have difficulty gaining access. Although asbestos is primarily associated with older buildings in many parts of the world, as Asbestos and the law, asbestos bans have been in pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hydraulic Jack
A jack is a mechanical lifting device used to apply great forces or lift heavy loads. A mechanical jack employs a screw thread for lifting heavy equipment. A hydraulic jack uses hydraulic machinery, hydraulic power. The most common form is a car jack, floor jack or garage jack, which lifts vehicles so that maintenance can be performed. Jacks are usually rated for a maximum lifting capacity (for example, 1.5 tons or 3 tons). Industrial jacks can be rated for many tons of Mechanical load, load. Etymology The personal name ''Jack'', which came into English usage around the thirteenth century as a nickname form of ''John'', came in the sixteenth century to be used as a colloquial word for 'a man (of low status)' (much as in the modern usage 'jack of all trades, master of none'). From here, the word was 'applied to things which in some way take the place of a lad or man, or save human labour'. The first attestation in the ''Oxford English Dictionary'' of ''jack'' in the sense 'a mach ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Population Density
Population density (in agriculture: Standing stock (other), standing stock or plant density) is a measurement of population per unit land area. It is mostly applied to humans, but sometimes to other living organisms too. It is a key geographical term.Matt RosenberPopulation Density Geography.about.com. March 2, 2011. Retrieved on December 10, 2011. Biological population densities Population density is population divided by total land area, sometimes including seas and oceans, as appropriate. Low densities may cause an extinction vortex and further reduce fertility. This is called the Allee effect after the scientist who identified it. Examples of the causes of reduced fertility in low population densities are: * Increased problems with locating sexual mates * Increased inbreeding Human densities Population density is the number of people per unit of area, usually transcribed as "per square kilometre" or square mile, and which may include or exclude, for example, ar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
