Improvements in the piecemeal demolition of chimneys.

摘要

Factory and power-station chimneys are demolished in a piecemeal manner by having erected or placed on the rim of the chimney a rig comprising a plurality of radiating arms (2) and a jack (4) mounted on each arm (2) and adjustable therealong with a supporting foot (5) under the arm (2) in contact with the chimney rim. The rig also comprises a substantially annular platform (7) underslung from the spider from which operatives can remove the fabric of the chimney. The fabric is removed from under the feet (5) of alternate jacks (4) and then these feet (5) are lowered into supporting contact with the newly-presented surface thereunder. The same is repeated with the intermediate jacks (4) and so on. Preferably, a covering structure (3) is supported by the arms (2) of the spider.