While re-cabling a server row, a technician and a coworker must move a 70 lb (32 kg) 2U UPS from its shipping pallet onto the rails in the bottom 4U of a 42U cabinet. According to recommended proper lifting techniques, which action should they take to minimize the risk of musculoskeletal injury?
Hoist the UPS above shoulder level first so it clears the rack posts, then lower it into place.
Stand an arm's length from the cabinet, grasp the UPS handles, and swing the unit sideways to align it with the rails in one motion.
Keep your knees locked, bend at the waist, and straighten your back quickly to raise the UPS before sliding it into the rack.
Squat by bending your knees and hips, keep your back straight, hold the UPS close to your torso, and lift smoothly with your legs while the coworker stabilizes the chassis.
Safe-lifting guidance from OSHA and industry ergonomics references states that heavy objects should be kept as close to the body as possible, the spine should stay neutral, the knees and hips should be bent in a squat, and the weight should be raised smoothly with the legs. Twisting, lifting with a straight back, extending the load away from the torso, or raising it above shoulder height all increase the moment arm on the spine and greatly raise the chance of strains. Therefore the only option that follows accepted technique is the one that keeps the UPS close, maintains a straight back, and uses the legs for the lift.
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What is a 2U UPS and why is it used in a server rack?
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