60. In an underground travelway inclined at 50º or more from the horizontal, rest landings covering the compartment served by ladders shall be installed at vertical distances not exceeding 7 m (23 ft), except for the openings allowing the passage of persons, which shall be 1 m2 (10.8 ft2) or less in area and, for every landing built on or after 10 July 1997, at least 70 cm (27.6 in) in width.
O.C. 213-93, s. 60; O.C. 782-97, s. 6; O.C. 1236-98, s. 9.