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Encyclopedia > Demolition
Demolition of the Old Myer Building, Perth, Western Australia.
Demolition of the Old Myer Building, Perth, Western Australia.

Demolition is the opposite of construction: the tearing-down of buildings and other structures. It contrasts with deconstruction, which is the taking down of a building while carefully preserving valuable elements for re-use. The tallest demolished building was the 47-story Singer Building of New York City, which was built in 1908 and torn down in 1967-1968 to be replaced by One Liberty Plaza. The word demolition has a number of uses: Demolition is the opposite of construction: the tearing-down of buildings and other structures. ... Image File history File links Download high-resolution version (749x1222, 2128 KB) Summary Demolition of the Old Myer Building (corner of William and Murray Streets) viewed from the Horseshoe Bridge, Perth, Western Australia. ... Image File history File links Download high-resolution version (749x1222, 2128 KB) Summary Demolition of the Old Myer Building (corner of William and Murray Streets) viewed from the Horseshoe Bridge, Perth, Western Australia. ... Myer Emporium. ... Location of Perth within Australia This article is about the metropolitan area of Perth, Western Australia. ... Look up Antonym in Wiktionary, the free dictionary. ... For other uses, see Construction (disambiguation). ... Old Executive Office Building, Washington D.C. Bank of China Tower, Hong Kong, China In architecture, construction, engineering and real estate development the word building may refer to one of the following: Any man-made structure used or intended for supporting or sheltering any use or continuous occupancy, or An... This article does not cite any references or sources. ... Deconstruction of a Building. ... The Singer Building at Liberty Street and Broadway in Manhattan, New York was an office building completed in 1908 as the headquarters of the Singer Manufacturing Company. ... New York, New York and NYC redirect here. ... One Liberty Plaza is a skyscraper in Manhattan, New York, which currently resides at the location of the former Singer Building (in 1968, the tallest building to be demolished)). The building is 743 feet (225m) high and 54 floors. ...


For most 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. House at Cúcuta, Colombia A house is a building typically lived in by one or more people. ... A tracked excavator by Daewoo. ... For other uses, see Bulldozer (disambiguation). ...


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 rock-breakers attached to excavators to cut or break through wood, steel, and concrete. The use of shears is especially common when flame cutting would be dangerous. A wrecking ball is a heavy steel ball, usually hung from a crane, that is used for demolishing large buildings. ... A modern crawler type derrick crane with outriggers. ...

Contents



Building implosion

The demolition of the New Haven Coliseum in New Haven, Connecticut.

Large buildings, tall chimneys, and increasingly some smaller structures may be destroyed by building implosion using explosives. Imploding a building is very fast — the collapse itself only takes seconds — and an expert can ensure that the building falls into its own footprint, so as not to damage neighboring structures. This is essential for tall structures in dense urban areas. Any error can be disastrous, however, and some demolitions have failed, severely damaging neighboring structures. The greatest danger is from flying debris which, when improperly prepared for, can kill onlookers. Even more dangerous is the partial failure of an attempted implosion. When a building fails to collapse completely the structure may be unstable, tilting at a dangerous angle, and filled with un-detonated but still primed explosives, making it difficult for workers to approach safely. While controlled implosion is the method that the general public often thinks of when discussing demolition, it is extremely dangerous and is only used as a 'last resort' when other methods are impractical or too costly. The destruction of large buildings has become increasingly common as the massive housing projects of the 1960s and 1970s are being levelled around the world. At 439 feet (134 m) and 2.2 million square feet, the J. L. Hudson Department Store and Addition is the tallest steel framed building and largest single structure ever imploded.[1] Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... The Coliseum on the morning of the implosion, with much of the structure stripped away. ... New Haven redirects here. ... Official language(s) English Capital Hartford Largest city Bridgeport[3] Largest metro area Hartford Metro Area[2] Area  Ranked 48th  - Total 5,543[4] sq mi (14,356 km²)  - Width 70 miles (113 km)  - Length 110 miles (177 km)  - % water 12. ... Look up Chimney in Wiktionary, the free dictionary. ... June 2006 demolition of the 12-story Tencza Apartment building in Arlington, Virginia. ... This article is concerned solely with chemical explosives. ... Public housing describes a form of housing tenure in which the property is owned by a government authority, which may be central or local. ... The J.L. Hudson Department Store and Addition is a now-demolished building in Detroit, Michigan, which occupied the address of 1206 Woodward Avenue. ...


Preparation

A high-reach excavator is used to demolish this tower block
A high-reach excavator is used to demolish this tower block

It takes several weeks or months to prepare a building for implosion. All items of value, such as copper wiring, are stripped from a building. Some materials must be removed, such as glass that can form deadly projectiles, and insulation that can scatter over a wide area. Non-load bearing partitions and drywall are removed.[2] Selected columns on floors where explosives will be set are drilled and nitroglycerin and TNT are placed in the holes. Smaller columns and walls are wrapped in detonating cord. The goal is to use as little explosive as possible; only a few floors are rigged with explosives, so that it is safer (less explosives) and also to save money. The areas with explosive are covered in thick geotextile fabric and fencing to absorb flying debris.[2] Far longer than the demolition itself is the clean-up of the site, as the debris is loaded into trucks and hauled away. Image File history File linksMetadata Download high-resolution version (1728x2304, 1100 KB) en: High Reach Demolition Excavator - Hydraulic demolition scissors on chassis CAT 330. ... Image File history File linksMetadata Download high-resolution version (1728x2304, 1100 KB) en: High Reach Demolition Excavator - Hydraulic demolition scissors on chassis CAT 330. ... A long reach excavator being used to demolish a tower block in northern England The long reach excavator or high reach excavator is a development of the excavator with an especially long boom arm, that is primarily used for demolition. ... A tower block, block of flats, or apartment block, is a multi-unit high-rise apartment building. ... This article is about the material. ... For the musical group Drywall, see Drywall (musical project) Example of drywall with joint compound, the common interior building material. ... Nitroglycerin (NG), also known as nitroglycerine, trinitroglycerin, and glyceryl trinitrate, is a chemical compound. ... R-phrases S-phrases Related Compounds Related compounds picric acid hexanitrobenzene Except where noted otherwise, data are given for materials in their standard state (at 25 Â°C, 100 kPa) Infobox disclaimer and references Trinitrotoluene (TNT) is a chemical compound with the formula C6H2(NO2)3CH3. ... This article does not cite its references or sources. ...


Traditional demolition

Before any demolition activities, there are many steps that need to take place — including but not limited to performing asbestos abatement, obtaining necessary permits, submitting necessary notifications, disconnecting utilities, rodent baiting, and development of site-specific safety and work plans.


The typical razing of a building is accomplished as follows:


Hydraulic excavators may be used to topple one- or two-story buildings by an undermining process. The strategy is to undermine the building while controlling the manner and direction in which it falls. The demolition project manager/supervisor will determine where undermining is necessary so that a building falls in the desired manner and direction. The walls are typically undermined at a building's base, but this is not always the case if the building design dictates otherwise. Safety and cleanup considerations are also taken into account in determining how the building is undermined and ultimately demolished.


In some cases a crane with a wrecking ball is used to demolish the structure down to a certain manageable height. At that point undermining takes place as described above.


To control dust, fire hoses are used to maintain a wet demolition. Hoses may be held by workers, secured in fixed location, or attached to lifts to gain elevation.


Loaders or bulldozers may also be used to demolish a building. They are typically equipped with "rakes" (thick pieces of steel that could be an I-beam or tube) that are used to ram building walls. Skid loaders and loaders will also be used to take materials out and sort steel.


New Approach to Demolition

A new approach to demolition is the deconstruction of a building with the goal of minimizing the amount of materials going to landfills. This "green" approach is applied by removing the materials by type material and segregating them for reuse or recycling. With proper planning this approach has resulted in landfill diversion rates that exceed 90% of an entire building and its contents in some cases. With the rising costs of landfills this method is usually more economical than traditional demolition, and contributes to a healthier environment. Examples of this can be found on http://www.greenrecyclingnetwork.com


Safety should always be paramount. A site safety officer should be assigned to each project to enforce all safety rules and regulations.


Gallery

See also

Demolition of a house in Iraq being used by insurgents House demolition is a military tactic which has been used systematically in numerous conflicts. ...

Footnotes

  1. ^ J.L. Hudson Department Store. Controlled Demolition, Inc..
  2. ^ a b Interview with Stacey Loizeaux. NOVA/PBS.

External links

  • ImplosionWorld

  Results from FactBites:
 
Demolition - Wikipedia, the free encyclopedia (616 words)
Demolition is the opposite of construction: the tearing-down of buildings and other structures.
For most buildings, such as houses, that are only two or three stories high, demolition is a rather simple process: the building is simply pulled down by excavators or bulldozers.
With heavy equipment, demolition of a house is a two man job that can be completed in a day or two.
Demolition (professional wrestling) - Wikipedia, the free encyclopedia (408 words)
Demolition was a former professional wrestling stable in World Wrestling Entertainment which consisted of Ax (Bill Eadie), Smash (Barry Darsow), and later Crush (Brian Adams).
But Demolition actually ascended to success in their own right, winning the WWF tag team titles three times.
Demolition's biggest win came at Wrestlemania VI when they defeated the Colossal Connection comprised of Andre the Giant and Haku.
  More results at FactBites »

 
 

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