Update - August 2011*** Safe Work Australia have a new confined space definition under the Model Work Health and Safety Regulations. This definition will be adopted in most states of Australia on 1 January 2012. The definition is:
A confined space is an enclosed or partially enclosed space that:
a) is not designed or intended primarily to be occupied or entered by a person; and
b) is, or is designed or intended to be, at normal atmospheric pressure while any person is in the space; and
c) presents a risk to health and safety from:
i. an atmosphere that does not have a safe oxygen level, or
ii. contaminants, including airborne gases, vapours and dusts, that may cause injury from fire or explosion, or
iii. harmful concentrations of any airborne contaminants, or
iv. engulfment
This is slightly different to the draft definition released in December 2010. What do you think???