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Lifting Sling Safety
 

Lifting Sling Safety

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How to inspect lifting slings and use safely

How to inspect lifting slings and use safely

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    Lifting Sling Safety Lifting Sling Safety Presentation Transcript

    • Sling Safety Presented by Bill Taylor
    • Objectives
      • Be familiar with OSHA’s regulations regarding slings.
      • Understand safe sling use.
      • Be able to identify and describe conditions necessitating sling’s replacement.
    • Slings
      • OSHA Part 29 CFR 1910.184 Defines a sling as :
      • An assembly which connects the load to the material handling (lifting) equipment
    • Frequency of Inspections
      • 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..
      • A thorough plant-wide inspection is required to be performed at least once every 12 months.
    • Hitches
    • Load Capacity and Sling Angles
      • The load capacity of the sling is determined by its weakest component.
      • Never Overload a Sling . 
      • Remember, the wider the sling legs are spread apart, the less the sling can lift!
      1000 lbs Capacity 707 lbs Capacity 500 lbs Capacity
    • 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
    • Three Types of Slings Wire Rope Slings Chain Slings Synthetic Web Slings
    • Chain Slings
    • Chain Slings
      • Only chain slings purchased from the manufacturer are allowed. No homemade slings allowed!!
    • Chain Sling Inspection Items
      • Cracks, stretches, nicks, gouges, welding splattered or deformed master links
      • One leg of a double or triple chain sling is longer than the others.  
      • 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.  
      • Chain size at any point of any link is less than stated in the chart on the next slide, the sling shall be removed.   
    • Special Precautions
      • Chain slings should never be modified or repaired by operators! Only qualified maintenance personnel may do so.
      • It is important to realize that the capacity of a sling decreases as the angle at which it is used to lift increases.
    • Wire Rope Slings
    • Wire Rope Sling Inspection Items
      •   Three randomly distributed broken wires in one strand, in one rope lay.
      • Wear or scraping of 1/3 the original diameter of outside individual wires.
      • Kinking, crushing or any damage resulting in distortion of the wire rope.
      • End attachments that are cracked, worn or deformed.
      • Corrosion of the rope or end attachments.
    • Polyester Round Slings Codes and Capacities
    • Synthetic Web Sling Inspection
      • Acid or caustic burns on the sling.
      • Melting or charring of any part of the sling’s surface.
      • Snags, punctures, tears, or cuts.
      • Stitching is broken or worn.
      • 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.
    • Safe Usage Practices
      • Slings should be stored off the floor and in a clean, dry place. Always hook with a closed hook arrangement hooks facing out.
      Never drag slings across the floor. 
    • Safe Usage Practices
      • Never shock load slings.
      • Keep loads balanced to prevent overloading slings.
      • Always lift loads straight up.
      • Never rest a load on a sling, or pinch a sling between the load and the floor.
      • A sling should not be pulled from under a load when the load is resting on the sling.
      • Make sure the hook is always over the center of gravity of the load before lifting it.
      • Do not apply a load to a twisted, knotted or kinked chain.
      • Do not force or hammer hooks or chains into position.
    • Safe Usage Practices
      • Hands and Fingers shall not be placed between the sling and the load while the sling is being tightened around the load.
      • Clean chains regularly as dirt and grit can cause excessive wear at the link bearing points.
      • Never shorten a sling with knots, bolts or other makeshift devices.
      • Protect the chain’s surface from contact with sharp corners, which can cause permanent damage through gouging or abnormal stress and wear.
    • In Conclusion
      • Select the right sling for the job.
      • Inspect slings prior to use, removing from service any in question.
      • Remember the effect of sling angles on load capacities.
      • Properly store slings when finished to avoid damage.