81. Construction and installation of winding equipment.
(1)Every part of a winding installation, including headgear shall be of sound construction and adequate strength, and shall be maintained in safe working order:Provided that in case of any doubt as to the construction and strength of the installation, it shall be referred to the Chief Inspector for decision.(2)The engine shall be firmly connected to a rigid foundation and shall be so designed, constructed and maintained that with the power provided, the raising and lowering of persons or materials can be carried out with ease regularity and safety.(3)Unless otherwise permitted in writing by the Chief Inspector and subject to such conditions as he may specify therein, every engine for winding shall be so situate in relation to the headgear that the winding rope shall not, in the extreme position, subtend in either direction an angle more than one and a half degrees with the plane of the sheave or pulley used in connection with the rope.(4)The diameter of the drums or sheaves of the winding engine, and of the pulleys and sheaves used in connection with the winding shall, unless otherwise permitted in writing by the Chief Inspector and subject to such conditions as he may specify therein, be not less than 80 times the diameter of the rope in the case of winding installations installed before the 25th day of October, 1955 and not less than 100 times the diameter of the rope in other cases:Provided that the Chief Inspector may, by an order in writing, require that in the case of any specified winding installation installed before the date aforesaid, the diameter of the said drums, pulley or sheaves shall not be less than such size, upto 100 times the diameter of the rope, as he may specify in the order.(5)The grooves of sheaves or pulleys used in winding installation shall be suited to the diameter of the rope.(6)Every pulley or sheave used in connection with winding shall, while in motion, rotate in a vertical plane, and shall be maintained in such a condition that slipping is reduced to a minimum.
