ASME B30.23:2005 pdf free download.Personnel Lifting Systems.
(1) Features. Platforms and suspension systems shall be designed to minimize hazards to the occupants. The following items shall be the minimum design requirements for a platform:
(1) A minimum platform rating of 300 lb (136 kg).
(2) Guardrail protection consisting of a top rail, intermediate rail, toe board, and lower harrier. The top rail shall he not less than 39 in. (990 mm) nor more than 45 in. (1140 mm) in height with respect to the platform floor. The toe board shall be around the entire periphery of the platform and a minimum of 3.5 in. (90 mm) in height from the top of the platform floor. The lower barrier shall span the distance between the toe board and intermediate rail and be of solid construction or expanded metal having no opening that would allow a 0.5 in. (13 mm) sphere to pass through. Each top rail, intermediate rail, and lower barrier shall be capable of withstanding a concentrated load of 300 lb (135 kg) applied at any point in an outward or downward direction without reaching the yield point of the material. A solid barrier from the top rail to the floor is permissible. provided the top rail height and barrier structural competence meet the requirements of this paragraph
(3) Anchorage points within the platform or on the boom tip. These points shall be suitable for attaching personnel fall protection device lanyards and capable of withstanding, without failure, the impact load created by falling loads. The falling loads shall be calculated using 300 lb (135 kg) as a single occupant weight, then multiplied by the number of occupants that are required to attach to the anchorage point when the platform is at maximum occupancy. Impact loads shall be calculated using this load and allowed to freely fall from the top rail of the platform while attached to the point with a lanyard having a length that permits movement within the platform’s perimeter hut not exceeding 6 ft (1.83 m).
(4) Hand railings within the suspended platform. Hand railings shall be provided around the entire platform with the exception of any access gates or doors. Hand railings shall have a clearance of not less than 1.5 in. (39 mm) between the railing and any other structure.
(5) Flooring with a slip-resistant surface and provisions to facilitate the free drainage of liquids and that will withstand the forces developed under proof testloadings. Flooring shall have no opening that will allowa sphere of 0.5 in. (13 mm) to pass through.
(6) Means to secure loose items within the platform.(7) An identification plate shall be located on theplatform. The location shall protect against damage andallow easy viewing from both the interior (while hoisted)and exterior (while not hoisted) of the platform.As aminimum, the following information shail be displayed:
(a) manufacturer name and address
(b)platform rating in terms of weight and per-sonnel.
ASME B30.23:2005 pdf free download
