Document 2j6YGgVJ3aBDg966Jk243a4Er

Powered Industrial Trucks Guards and Safety Devices Powered industrial trucks capable of lifting loads higher than the operator's head or oper ated in areas where there is a hazard from fall ing objects should be equipped with an over head guard (Fig 22-1) This guard should not interfere with good visibility Openings m the guard should be small enough to pro tect the operator from being struck by objects or material falling from an overhead load or stack, and should conform to ASI Standard B56 1 A load backrest extension should al ways be used when operating conditions per mit Trucks should be equipped with platforms extending beyond the operator's position, strong enough to withstand a compression FlC 22-2--Platform guard on this truck protects the operator from backing accidents and rear-end collisions load equal to the weight of the loaded vehicle applied along the longitudinal axis ofthe truck with the outermost projection of the platform axis of the truck with the outermost projection of the material against a flat vertical surface (Fig 22-2) Additional operator enclosures are not rec ommended because rapid and unobstructed ingress/egress for the operator is considered more desirable However, should additional enclosures be provided in conjunction with the platform, they should not prevent easy ingress or egress from the platform Exposed tires should have guards which will stop particles from being thrown at the operator Hazardous moving parts, such as chain and sprocket drives and exposed gears, should be guarded if possible Although many lift trucks may come equipped with steering hand wheel knobs, their use is prohibited by many companies If knobs are used, they should be of the mush room type to engage the palm of the operator's hand m the horizontal position, and should be mounted within the periphery ofthe wheel The steering mechanism should minimize transmission of road shock to the steering hand wheel Every powered industrial truck should carry a name plate showing the weight of the truck and its rated capacity as specified by the ASI Standard B56 I, Safety Standardfor Powered Industrial Trucks, previously mentioned Powered industrial trucks should be painted a distinctive color to make them readily vis ible Color should comply with the ASI Standard Z53 1, Safety Color Code for Mark ing Physical Hazards and the Identification of Certain Equipment Powered industrial trucks should have horns or other warning devices with a distinc tive sound, loud enough to be heard clearly above other local noises The warning device should be under the control of the operator Specifications of steering, braking and con trol arrangements should conform m detail to the ASI Standard B56 1 Powered industrial trucks should also be constructed and equipped to comply with Underwriters' Laboratories "Standards for Safety" UL 558 and UL 583, and for hazard ous locations should comply with NFPA code No 505 The definitions of hazardous locations are given in the NFPA National Electrical Code Class I locations are those m which flammable gases or vapors are or may be present. Class II, combustible dust, and Class III, easily lgnitible fibers or flyings The B56 1 Safety Standard for Powered Industrial Trucks stip ulates that trucks, electrical or gasolinepowered, shall not be used m certain hazard ous locations unless they either comply with NFPA requirements or, m some cases, are specifically approved by the inspection au thority for the locations involved This stip ulation should apply to any intemal-combus- 612