Ejection from the platform

If using a boom-type MEWP, occupants may be ejected from the platform if the catapult effect occurs. This is common if the MEWP becomes snagged on another object or structure, and breaks free suddenly, as stored inertia causes a whiplash or catapult effect. This can also occur if a boom-type MEWP is struck by a moving vehicle or other plant equipment, travelling over rough terrain or unsafe ground, or if the ground gives way under a machine wheel or outrigger.

Users must carry out a risk assessment, including assessing ground conditions, and take care to segregate the work site, including areas the boom might overhang, particularly where vehicular traffic or other plant operations are in the vicinity. All platform occupants must wear a suitable full-body harness and adjustable restraint lanyard, must clip on to the correct anchor-point in the platform and must not disengage until operation is complete. Operators should not try to free a snagged platform with violent use of the controls. Seek assistance from ground personnel in this scenario.

See also: H1 Harness leaflet; ground conditions assessment; Street Smart campaign; Use Personal Fall Protection Equipment (PFPE) Toolbox Talk.