1. Safety Advice

Avoid Overhead Obstructions

MEWP Entrapment

Why am I at risk from overhead obstructions when using a MEWP?

Mobile elevating work platforms (MEWPs) can be used in confined areas, or near overhead structures. When travelling or when elevated there is a risk that the operator or the platform occupant may come in contact with an overhead obstruction. This could result in crushing or entrapment of that person.

Entrapment may be caused by:

  • Lack of awareness of the proximity of obstructions while operating the MEWP (overhead beam, etc);
  • Selecting the wrong control or moving the MEWP in the wrong direction when close to overhead obstructions;
  • Operating the MEWP erratically when close to overhead obstructions;
  • Not providing enough stopping or ramping distance when operating close to the overhead obstructions;
  • Sudden movements of the boom (boom bounce) caused when travelling into a kerb or ditch, or when released after being snagged. The elastic movement of the boom can result in increased motion of the platform.

WHAT SHOULD I DO?

Make a comprehensive risk analysis:

  • Identify potential overhead obstructions;
  • Identify the work tasks at height;
  • Determine if secondary guarding is required;
  • Verify that a rescue plan is valid and active;
  • Check that the MEWP operator is familiarised;
  • Use the correct sequence of motion;
  • Operate the controls slowly and deliberately;
  • Use a grounds person (banksman) to supervise MEWP movement when in confined areas.

See also: Avoid Overhead Obstructions Toolbox Talk, Andy Access Poster A12 – Overhead Obstructions, MEWP Rescue Plan Toolbox Talk