R 408.10575b Two- and 4-point suspended working platforms.

Rule 575b. (1) The 2- and 4-point suspended working platform shall be not less than 24 inches (610 mm) wide and shall be provided with a minimum of a 12-inch (305 mm) wide passage at or past any obstruction on the platform. (2) The flooring of the 2- and 4-point suspended working platform shall be of a slip-resistant type and shall not have an opening that would allow the passage of lifelines, cables, and other potential falling objects. (3) The 2- and 4-point suspended working platform shall be provided with a means of suspension that will restrict the platform from tilting more than 15 degrees in any direction. (4) Any cable that is suspended from above the 2- and 4-point suspended working platform shall be provided with a means for storage to prevent accumulation of the cable on the floor of the platform. (5) All operating controls for the vertical travel of the 2- and 4-point suspended working platform shall be of the continuous-pressure type and shall be located on the platform. (6) Each operating station of every 2- and 4-point suspended working platform shall be provided with a means of interrupting the power supply to all hoist motors to stop any further powered ascent or descent of the platform. (7) The maximum rated speed of the 2- and 4-point suspended working platform shall not be more than 50 feet per minute (0.3 ms) for single-speed hoists and not more than 75 feet per minute (0.4 ms) for multispeed hoists. (8) All tools, water tanks, and other accessories shall be secured to prevent their movement or accumulation on the floor of the 2- and 4-point suspended working platform. (9) Portable fire extinguishers that are in compliance with the provisions of General Industry Safety Standard Part 8 “Portable Fire Extinguishers," as referenced in R 408.10509, shall be provided and securely attached on all 2- and 4-point suspended working platforms. (10) Access to and egress from a 2- and 4-point suspended working platform, except for those that land directly on a safe surface, shall be provided by stairs, ladders, platforms, and runways that are in compliance with the provisions of General Industry Safety and Health Standard Part 2 “Walking-Working Surfaces,” as referenced in R 408.10509. Access gates shall be self-closing and self-latching. (11) Means of access to or egress from a working platform that is 48 inches (1.2 m) or more above a safe surface shall be provided with a guardrail system or ladder-handrails that are in compliance with the provisions of General Industry Safety and Health Standard Part 2 “Walking-Working Surfaces,” as referenced in R 408.10509. (12) The 2- and 4-point suspended working platform shall be provided with a secondary wire rope suspension system if the platform has overhead structures that restrict the emergency egress of employees. A horizontal lifeline or a direct connection anchorage shall be provided as part of a personal fall arrest system. The system shall be in compliance for each employee on such a platform with the requirements of General Industry Safety and Health Standard Part 33 “Personal Protective Equipment" as referenced in R 408.10509. (13) A vertical lifeline shall be provided as part of a personal fall arrest system. The system shall be in compliance with the requirements of General Industry Safety and Health Standard Part 33 “Personal Protective Equipment," as referenced in R 408.10509, for each employee on a working platform that is suspended by 2 or more wire ropes, if the failure of 1 wire rope or suspension attachment will cause the platform to upset. If a secondary wire rope suspension is used, vertical lifelines are not required for the personal fall arrest system, provided that each employee is attached to a horizontal lifeline anchored to the platform.