Demolition can be carried out by various methods; however the choosing the safest and simplest method is the general rule. It can be easily accomplished for the small two to three storied buildings for example houses. In this case laborers can demolish the building manually with their traditional equipment .or other mechanical equipment like cranes, excavators or bulldozers. Generally both mechanical and manual methods are used simultaneously. For larger buildings we need different equipment like wrecking ball, a heavy weight on a cable that is swung by a crane into the side of the buildings. Wrecking balls are not an efficient method that is use for destroying the building. They are mostly used to destroy masonry. Newer methods are now in vogue which includes rotational hydraulic shears and silenced rock-breakers attached to excavators to cut or break through wood, steel, and concrete. We use TNT, nitroglycerine C4 and detonating cord. It has the advantage of efficiency and cost effectiveness. But it has a lot of hazards.
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