288.1. Despite section 288, the minimum safety factor of a new hoisting rope installed on a drum hoist used in a vertical shaft is determined according to the following formula:
minimum safety factor = 25,000/(4,000 + L)
(L being the maximum length of rope in metres suspended below the head sheave where the conveyance is at the lower limit of travel).
In such a case, the following standards and conditions must be met:(1) the drum hoist must comply with SABS Standard 0294:2000, Code of Practice for the Performance, Operation, Testing and Maintenance of Drum Winders relating to Rope Safety, subject to the adaptation guide of South African Standard SABS0294:2000 in accordance with the Mine Occupational Health and Safety Regulation (chapter S-2.1, r. 14) published by the Mining and Mineral Sciences Laboratories, MMSL-CANMET;
(2) the hoisting rope must be used, maintained and checked in accordance with SABS Standard 0293:1996, Code of Practice for the Condition Assessment of Steel Wire Ropes on Mine Winders, subject to the adaptation guide of South African standard SABS0293:1996 in accordance with the Mine Occupational Health and Safety Regulation published by the Mining and Mineral Sciences Laboratories, MMSL-CANMET; and
(3) the drum hoist must be equipped with a device continuously monitoring the condition of the rope, which must be able to detect a sudden loss of the rope section and stop the drum hoist if the loss exceeds 10%.
O.C. 639-2000, s. 2; O.C. 42-2004, s. 16; O.C. 1190-2010, s. 11.