The employer shall ensure at a construction site of a building or other construction work that the following requirements are fulfilled in case the mechanical method of demolition like use of swinging weight, clamshell bucket, powder shovel, bulldozer or other similar mechanical methods are used for the purpose of demolition, namely:-
(a) that the building or structure or remaining portion thereof shall be not more than twenty four metres in height;
(b) that were a swinging weight is used for demolition, a zone of such demolition having a radius of at least one and a half times the height of the structure or portion thereof being so demolished shall be maintained around the points of impact of such swinging weight;
(c) where a clamshell bucket is being used for demolition, a zone of demolition shall be maintained within eight metres of the line of travel of such bucket;
(d) that were other mechanical methods are being used to affect total or partial collapse of a building or other construction work there shall be maintained in the area into which the affected portion of such building or other construction work may fall, a zone of demolition at least one and a half times the height of such affected portion thereof; and -52-
(e) no person other than building workers or other persons essential to the operation of demolition work shall be permitted to enter a zone of demolition referred to in clause (a) which shall be provided with substantial barricades.
CHAPTER XIII.
Excavation and Tunneling Works.