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(a) Seat belt assemblies shall be provided and used on all equipment where rollover protection is installed and employees shall be instructed in their use. Seat belt assemblies installed after June 26, 1998, shall be labeled as meeting the design requirements of SAE J386 JUN93, Operator Restraint System For Off-Road Work Machines. Seat belt assemblies installed on or before June 26, 1998, shall be labeled as meeting either the design requirements of the SAE standard indicated above or the SAE J386 JUN85 standard.
(b) Where a suspended seat is used, the seat belt shall be fastened to the movable portion of the seat to accommodate ride motion of the operator.
(c) The seat belt anchorage shall be capable of withstanding a static tensile load of 1,000 pounds (453.6 kg) at 45 degrees to the horizontal equally divided between the anchorage. The seat mounting shall be capable of withstanding this load plus a load equal to 4 times the weight of all applicable seat components applied 45 degrees to the horizontal in a forward and upward direction. In addition, the seat mounting shall be capable of withstanding 500 pounds (226.8 kg) belt load plus 2 times the weight of all applicable seat components both applied at 45 degrees to the horizontal in an upward and rearward direction. Floor and seat deformation is acceptable providing there is no structural failure or release of the seat adjuster mechanism or other locking device. The seat adjuster or locking device need not be operable after application of the test load.
(d) The webbing material shall have a resistance to acids, alkalies, mildew, aging, moisture, and sunlight equal to or better than that of untreated polyester fiber.
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