seminar on demolition of buildings and techniques followed-ppt

demolition of building ppt
my seminar topic is demolition of building pls forward it to my account lijas90[at]gmail.com

my seminar topic is demolition of building pls forward itS PPT to my account WWW.ATHIRA.M.S[at]GMAIL.COM

To get full information or details of demolition of buildings please have a look on the pages

http://studentbank.in/report-controlled-...structures

http://studentbank.in/report-controlled-...ull-report

if you again feel trouble on demolition of buildings please reply in that page and ask specific fields in demolition of buildings

i need demolition of structures using implosion technology ppt and report with abstract

To get full information or details of demolition of buildings please have a look on the pages




http://studentbank.in/report-controlled-...structures

http://studentbank.in/report-controlled-...ull-report


if you again feel trouble on demolition of buildings please reply in that page and ask specific fields in demolition of buildings

my seminar topic is demolition of building.pls forward its ppt to sherinthomasmulavana[at]gmail.com

---

pls forward ppt on demolition of building to sherinthomasmulavna[at]gmail.com

my seminar topic is demolition of building.pls forward its ppt to sherinthomasmulavana[at]gmail.com

---

my seminar topic is demolition of building.pls forward its ppt to sherinthomasmulavana[at]gmail.com

demolition of buildings ppt

Demolition is the tearing-down of buildings and other structures. Demolition contrasts with deconstruction, which involves taking a building apart while carefully preserving valuable elements for re-use.

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 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.

Before any demolition activities, there are many steps that need to take place — including but not limited to performing asbestos abatement, removing hazardous or regulated materials, 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 is pulled 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. Hoe rams are typically used for removing the concrete road deck and piers during bridge demolition, while hydraulic shears are used to remove the bridge's structural steel.

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. However crane mounted demolition balls are rarely used within demolition due to the uncontrollable nature of the swinging ball and the safety implications associated.

High reach demolition excavators are more often used for tall buildings where explosive demolition is not appropriate or possible. Excavators with shear attachments are typically used to dismantle steel structural elements. Hydraulic hammers are often used for concrete structures and concrete processing attachments are used to crush concrete to a manageable size, and to remove reinforcing steel. For tall concrete buildings, where neither explosive or high reach demolition with an excavator is safe or practical, the "inside-out" method is used, whereby remotely operated mini-excavators demolish the building from the inside, whilst maintaining the outer walls of the building as a scaffolding, as each floor is demolished.

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.