ASME B30.13-2017 pdf – Storage/Retrieval(S/R) Machines and Associated Equipment.
(c) a minimum climbing space of 15 in. (381 mm) each way from the centerline of the ladder and 30 in. (762 mm) on the climbing side of the ladder shall be provided except when inside cages or hatchways are used.
(d) the distance from the centerline of the rungs to the nearest permanent object in back of the ladder shall be not less than 7 in. (178 mm)
(e) on ladders over 20 ft (6 m) in height, cages shall be provided from a point not more than 8 ft (2.4 m) above the floor, to a point not less than 3 ft 6 in. (1.1 m) above the landing platform unless safety devices as per (f) are provided. Such cages shall be at least 27 in. (685 mm) clear inside diameter.
(fi ladder safety devices may be used on ladders over 20 ft (6 m) in unbroken height in lieu of cage protection. All ladder safety devices such as those that incorporate life belts, friction brakes, and sliding attachments shall meet the design requirements of the ladders that they serve.
(g) when exiting at the top of the ladder, handrails of at least 3 ft 6 in. (1.1 m) shall extend vertically from the top level of the ladder; otherwise, the ladder will extend an additional similar distance above the point of exit.
13-1.6.4 Access to Cab or Service Platform
Access to the cab or service platform shall be by means requiring no step over any gap exceeding 12 in. (305 mm).
13-1.6.5 Personnel Access to Machine Aisles and Runways
Machine aisles and runways shall be clearly identified by signage to indicate they are for use only by designated personnel.
13-1.7.1 Stops
Mechanical means shall be provided for preventing the shuttle from becoming disengaged from its support(s).
13-1.7.2 Bumpers for SIR Machines and Aisle Transfer Cars
(a) S/R machines or aisle transfer cars shall be provided with bumpers or other means capable of stopping the equipment including the rated load when traveling in either direction at 100% of the rated load speed without structural damage to the equipment. When devices other than bumpers are provided for this purpose, they shall operate independently from all other power, drive, and electrical systems on the SIR machine or aisle transfer car.
(b) The application of the stopping force shall not cause the SIR machine or the aisle transfer car to overturn.
(c) When more than one SIR machine or aisle transfer car is located and operated on the same runway, bumpers or other means shall be provided on their adjacent ends to meet the stopping requirements specified in (a) and (b). When devices other than bumpers are used, the application of such devices shall be based on sensing the physical position of other SIR machines or aisle transfer cars at a safe enough distance to ensure sufficient braking application to prevent collision.
(il) As an additional requirement for operator ridden SIR machines and for machines that may be ridden by other personnel, bumpers or other means shall be provided that are capable of stopping the SIR machine (including the rated load) at a deceleration that shall not exceed 16 ft/sec.’? (4.9 mIs2) when travelling in either direction at 500/o of the rated load speed.
13-1.7.3 Runway Interlocks
(a) Interlocks shall prevent SIR machine travel between the aisle and aisle transfer car unless the tracks in the aisle and on the transfer car are aligned. Also, travel of the transfer car shall be prevented unless the SIR machine is completely on or off the transfer car.
(t) Means should be provided to limit the drop of the SIR machine frame to 1/2 in. (13 mm) in case of wheel or axle breakage. Also, a means should be provided to limit the lateral movement in the event of wheel or axle breakage.
13-1.7.4 Runway Sweeps
Runway sweeps shall be provided in front of the runway wheels to provide clear passage for the wheels.