This document discusses the demolition of structures. It begins by stating the objectives of demolition, which are to safely bring down buildings after their service life for safety reasons. It then outlines the steps before demolition, including surveying the structure and removing hazardous materials. Various demolition methods are presented, including piecemeal demolition using hand tools or wrecking balls, mechanical demolition using excavators, and explosive demolition through controlled implosions. Safety precautions for demolition are also addressed.