Why Lifting Incidents Happen

The main ways a lifting operation harms people, and the planning gaps that sit behind each of them.

11 min

Activities: 0 of 2

A lift concentrates energy

A suspended load holds a large amount of stored energy. When anything in the system fails, that energy is released in a fraction of a second. The load falls, swings, or the machine overturns. There is very little time for anyone to react, so lifting safety depends almost entirely on what was decided before the load left the ground.

An intermediate practitioner is expected to do more than follow a plan. You must be able to look at a lift, see which failure is most likely, and choose the control that matches it. That starts with knowing the failure modes.

The five main failure modes

The pattern behind the failures

When lifting incidents are investigated, the immediate cause is usually physical: a cut sling, a soft patch of ground, a gust of wind. The underlying causes repeat across industries:

  • the load was not known (weight, centre of gravity, condition);
  • the plan did not match the real site;
  • the people did not have the competence or the authority their role needed;
  • conditions changed and nobody stopped to reassess.

Each later module of this course takes one of these gaps and shows how to close it.

Match each event to its failure mode

Pair each short description with the failure mode it shows.

  • An outrigger sinks into a backfilled trench
  • A webbing sling is cut on the sharp edge of a beam
  • The hoist rope touches a live conductor
  • A thin cover panel tears off the load during the lift

A crane overturns while lifting a tank that was assumed to be empty. Which underlying gap is most likely?

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