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S-2.1, r. 14 - Regulation respecting occupational health and safety in mines
Section 75.6
Disposition versions
75.6. A tubular ladder emergency exit shall comply with the following standards:
(1) be built entirely of materials that, as of the date of manufacture, meet the requirements of the flame test for a vertical conduit of CAN/CSA Standard M427-M1991, Fire-Performance and Antistatic Requirements for Ventilation Materials;
(2) be inclined at least 65° and not more than 80°;
(3) be free from any cables, pipes or other services, with the exception of those required for the installation of a fall-protection system pursuant to section 75.13 or a climb assist system;
(4) provide inside clearance of at least 70 cm (27.6 in) in diameter at all points;
(5) where the height of the exit is greater than 75 m (246.1 ft), have a climb assist system installed in accordance with the plans and specifications of an engineer and used and maintained in accordance with the manufacturer’s recommendations.
