Whitelaw Rigging & Fabrication Inc.

General Usage - Certain factors in the use of lifting chain and attachments can be abusive and reduce the load that the chain or attachments can support. Some examples are twisting the chain, jerking the load, excessive load, going around sharp corners, excessive sling to load angle and unbalanced loading.

When using a choker hitch, the Working Load Limit must reduced by 20%. We recommend a minimum angle of choke of 120 degrees.

When using chain shorteners, or slings with adjusters at the masterlink, a 20% reduction of the Working Load Limit is required, except when using cradle grab hooks, or Crosby EliminatorTM masterlinks.

Normal operating temperature is -40°F to 400°F (-40°C to 204°C). When used outside of these temperatures, consult the manufacturer.

Chemically active environments such as acids or corrosive liquids or fumes can reduce the performance of the chain. Surface coating, plating or galvanizing should not be performed on lifting chain. If chain is exposed to chemically active environment, remove from service.

The above is not a comprehensive overview of usage information. The user should familiarize himself with all applicable goverment and industry standards including OSHA 1910.184 and ASME B30.9.

 

INSTRUCTIONS FOR CARE, USE, INSPECTION AND REPAIR

 

CARE :

  • Store on a rack in a clean, dry place.
  • Oil prior to prolonged storage.
  • Do not anneal (temper) alloy chain, connecting links or hooks. Hot galvanizing requires chain manufacturer’s advice.

USE:

  • Check weight of load.
  • Check sling rated load for type of lift and angle of loading (see load angle chart).
  • Avoid twists, knots or kinks
  • Be sure that the load cannot cut the sling during the lift by padding corners, edges, protrusions or abrasive surfaces; use materials of sufficient strength and thickness.
  • Center load on base (bowl ) of sling hook unless sling hook is designed for point loading.
  • Balance load.
  • Maintain load control.
  • Avoid dragging sling over rough surfaces and from under the load.
  • Choker hitch must choke on sling body, never on a fitting.
  • Stand clear of load at all times.
  • If sling is to be used in a chemical environment, or in temperatures below –40ºF, or above 400°F, contact manufacturer for specific recommendations.
  • When shortening chain, use only the manufacturer’s recommended alloy components.

INSPECTION:

  •  Before use: Check for nicks, gouges or excessive wear. Look for bent, twisted, deformed chain or components. Look for heat damage, weld spatter, pitting or corrosion, increase in hook throat opening, missing latch (if so equipped), or missing rated load tag. These conditions are serious and the sling must be evaluated by a qualified person before further use. Periodic Inspections must be recorded annually for normal service—monthly/quarterly for severe service. Only chain manufacturer or other designated person performs periodic inspections.

REPAIR:

  • Any hazardous condition disclosed by an inspection shall require repair by chain manufacturer or other qualified person.
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