FAQ >> Crane Rigging a Load and Crane Overloading

Crane Rigging a Load and Crane Overloading

Crane Rigging a Load

Do the following when rigging a load:

  • Determine the weight of the load. Do not guess.
  • Determine the proper size for slings and components.
  • Do not use manila rope for rigging.
  • Make sure that shackle pins and shouldered eye bolts are installed in accordance with the manufacturer's recommendations.
  • Make sure that ordinary (shoulderless) eye bolts are threaded in at least 1.5 times the bolt diameter.
  • Use safety hoist rings (swivel eyes) as a preferred substitute for eye bolts wherever possible.
  • Pad sharp edges to protect slings. Remember that machinery foundations or angle-iron edges may not feel sharp to the touch but could cut into rigging when under several tons of load. Wood, tire rubber, or other pliable materials may be suitable for padding.
  • Do not use slings, eye bolts, shackles, or hooks that have been cut, welded, or brazed.
  • Install wire-rope clips with the base only on the live end and the U-bolt only on the dead end. Follow the manufacturer's recommendations for the spacing for each specific wire size.
  • Determine the center of gravity and balance the load before moving it.
  • Initially lift the load only a few inches to test the rigging and balance.

Crane Overloading

Cranes or hoists shall not be loaded beyond their rated capacity for normal operations. Any crane or hoist suspected of having been overloaded shall be removed from service by locking open and tagging the main disconnect switch. Additionally, overloaded cranes shall be inspected, repaired, load tested, and approved for use before being returned to service.

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