Crane Operator how-to

How to Read a Crane Load Chart

Load charts determine whether a lift is safe.

Updated By the Career Education Institute Curriculum Team
Quick answer

Load charts determine whether a lift is safe. In short: identify; find; find, then complete the remaining steps below.

Step by step

  1. Identify the crane configuration: boom length, counterweight and outriggers.

  2. Find the radius at the pick and set points.

  3. Find the rated capacity at that radius and boom length.

  4. Subtract the weight of rigging, hook block and attachments.

  5. Compare the net capacity with the load weight.

  6. Apply company limits, such as not exceeding a percentage of capacity.

Safety reminders for crane operators

  • Never exceed load chart capacity
  • Keep required clearance from power lines
  • Stop lifts when wind exceeds limits
  • Obey stop signals from anyone

Load chart · Radius · Outriggers · Boom · Jib · Load moment indicator (LMI): see the full crane operator glossary.

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