背部安全培训.pptVIP

The Forces Involved The amount of force you place on your back in lifting may surprise you! Think of your back as a lever. With the fulcrum in the center, it only takes ten pounds of pressure to lift a ten pound object. The Forces Involved If you shift the fulcrum to one side, it takes much more force to lift the same object. Your waist acts like the fulcrum in a lever system, on a 10:1 ratio. Lifting a ten pound object puts 100 pounds of pressure on your lower back. The Forces Involved When you add in the 105 pounds of the average human upper torso, you see that lifting a ten pound object actually puts 1,150 pounds of pressure on the lower back. The Forces Involved If you were 25 pounds overweight, it would add an additional 250 pounds of pressure on your back every time you bend over. Common Causes of Back Injuries Anytime you find yourself doing one of these things, you should think: DANGER! My back is at risk! Try to avoid heavy lifting . . Especially repetitive lifting over a long period of time Common Causes of Back Injuries Twisting at the waist while lifting or holding a heavy load . . . this frequently happens when using a shovel. Common Causes of Back Injuries Reaching and lifting . . . over your head, across a table, or out the back of a truck . . . . Common Causes of Back Injuries Lifting or carrying objects with awkward or odd shapes . . . . Common Causes of Back Injuries Working in awkward, uncomfortable positions . . . Common Causes of Back Injuries Sitting or standing too long in one position . . . sitting can be very hard on the lower back . . . . Common Causes of Back Injuries It is also possible to injure your back slipping on a wet floor or ice . . . Prevent Back Injuries Avoid lifting and bending whenever you can. Place objects up off the floor. Raise/lower shelves. Use carts and trolle