Lifting Sling Safety


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How to inspect lifting slings and use safely

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Lifting Sling Safety

  1. 1. Sling Safety Presented by Bill Taylor
  2. 2. Objectives <ul><li>Be familiar with OSHA’s regulations regarding slings. </li></ul><ul><li>Understand safe sling use. </li></ul><ul><li>Be able to identify and describe conditions necessitating sling’s replacement. </li></ul>
  3. 3. Slings <ul><li>OSHA Part 29 CFR 1910.184 Defines a sling as : </li></ul><ul><li>An assembly which connects the load to the material handling (lifting) equipment </li></ul>
  4. 4. Frequency of Inspections <ul><li>All slings are to be inspected prior to their use. This includes chain, wire rope and synthetic slings and their attachments, i.e. master links, alligators, clips, hooks, quick-alloys etc.. </li></ul><ul><li>A thorough plant-wide inspection is required to be performed at least once every 12 months. </li></ul>
  5. 5. Hitches
  6. 6. Load Capacity and Sling Angles <ul><li>The load capacity of the sling is determined by its weakest component. </li></ul><ul><li>Never Overload a Sling .  </li></ul><ul><li>Remember, the wider the sling legs are spread apart, the less the sling can lift! </li></ul>1000 lbs Capacity 707 lbs Capacity 500 lbs Capacity
  7. 7. Load Capacity and Sling Angles Example: Choker rating of each sling = 6,000 lbs. Measured Length (L) = 6 ft. Measured Height (H) = 4 ft. Reduction Factor (RF) = 4 (H) ÷ 6 (L) = .667 Reduced sling rating in this configuration = .667(RF) x 6,000 lbs. = 4,000 lbs. of lifting capacity per sling
  8. 8. Three Types of Slings Wire Rope Slings Chain Slings Synthetic Web Slings
  9. 9. Chain Slings
  10. 10. Chain Slings <ul><li>Only chain slings purchased from the manufacturer are allowed. No homemade slings allowed!! </li></ul>
  11. 11. Chain Sling Inspection Items <ul><li>Cracks, stretches, nicks, gouges, welding splattered or deformed master links </li></ul><ul><li>One leg of a double or triple chain sling is longer than the others.   </li></ul><ul><li>Hooks have been opened more than 25% of the normal throat opening measured at the narrowest point or twisted more than 10 degrees from the plane of the unbent hook.   </li></ul><ul><li>Chain size at any point of any link is less than stated in the chart on the next slide, the sling shall be removed.    </li></ul>
  12. 12. Special Precautions <ul><li>Chain slings should never be modified or repaired by operators! Only qualified maintenance personnel may do so. </li></ul><ul><li>It is important to realize that the capacity of a sling decreases as the angle at which it is used to lift increases. </li></ul>
  13. 13. Wire Rope Slings
  14. 14. Wire Rope Sling Inspection Items <ul><li>  Three randomly distributed broken wires in one strand, in one rope lay. </li></ul><ul><li>Wear or scraping of 1/3 the original diameter of outside individual wires. </li></ul><ul><li>Kinking, crushing or any damage resulting in distortion of the wire rope. </li></ul><ul><li>End attachments that are cracked, worn or deformed. </li></ul><ul><li>Corrosion of the rope or end attachments. </li></ul>
  15. 15. Polyester Round Slings Codes and Capacities
  16. 16. Synthetic Web Sling Inspection <ul><li>Acid or caustic burns on the sling. </li></ul><ul><li>Melting or charring of any part of the sling’s surface. </li></ul><ul><li>Snags, punctures, tears, or cuts. </li></ul><ul><li>Stitching is broken or worn. </li></ul><ul><li>The sling is stretched. To assist operators in determining if a sling is stretched, manufacturers incorporate a red wear cord inside of the sling. When this red wear cord can be readily seen upon inspecting the sling, the sling has been stretched and is to be removed. </li></ul>
  17. 17. Safe Usage Practices <ul><li>Slings should be stored off the floor and in a clean, dry place. Always hook with a closed hook arrangement hooks facing out. </li></ul>Never drag slings across the floor. 
  18. 18. Safe Usage Practices <ul><li>Never shock load slings. </li></ul><ul><li>Keep loads balanced to prevent overloading slings. </li></ul><ul><li>Always lift loads straight up. </li></ul><ul><li>Never rest a load on a sling, or pinch a sling between the load and the floor. </li></ul><ul><li>A sling should not be pulled from under a load when the load is resting on the sling. </li></ul><ul><li>Make sure the hook is always over the center of gravity of the load before lifting it. </li></ul><ul><li>Do not apply a load to a twisted, knotted or kinked chain. </li></ul><ul><li>Do not force or hammer hooks or chains into position. </li></ul>
  19. 19. Safe Usage Practices <ul><li>Hands and Fingers shall not be placed between the sling and the load while the sling is being tightened around the load. </li></ul><ul><li>Clean chains regularly as dirt and grit can cause excessive wear at the link bearing points. </li></ul><ul><li>Never shorten a sling with knots, bolts or other makeshift devices. </li></ul><ul><li>Protect the chain’s surface from contact with sharp corners, which can cause permanent damage through gouging or abnormal stress and wear. </li></ul>
  20. 20. In Conclusion <ul><li>Select the right sling for the job. </li></ul><ul><li>Inspect slings prior to use, removing from service any in question. </li></ul><ul><li>Remember the effect of sling angles on load capacities. </li></ul><ul><li>Properly store slings when finished to avoid damage. </li></ul>