The absurd “2-metre rule”

Recently a colleague spoke to me about the absurdity of the OHS regulations on falling from heights. Australia has a “default” position that, in reality, establishes a 2 metre benchmark for fall prevention initiatives. In practice, workers take it that any work on a ladder where the “grounded” foot is higher than 2 metres from the surrounding area as requiring a risk assessment and, most likely, some fall protection equipment.
My colleague argued that the benchmark should be where a worker’s head is over 2 metres above the floor when working in an elevated position. This is based on the logic, my colleague says fact, that when someone falls, serious injury and death usually result from the worker’s head hitting the floor.
The advocation of a 2 metre criterion operates contrary to the hierarchy of controls which sets the aim of eliminating the risks associated with working at any height. If Australia is moving to a regime of nationally uniform OHS legislation, these laws should be reviewed so that there is also national consistency in safety advice.
As in many other circumstances the UK’s HSE seems to have its act together on this workplace hazard by emphasising the work tasks rather than getting bogged down on a measurement – a measurement that seems to have little science or logic to support it.