Lift-off hinges are a type of hinge made up of two parts which allow door removal without the need to open the door. Australian building law requires that in an emergency, a toilet door can be removed by someone on the outside. For example, in most cases, toilet doors must open outwards, slide, or be readily removable from the outside of the compartment. This requirement only applies if the space between the toilet pan and the door is less than 1200mm.
An inward swinging toilet door with lift-off hinges will typically have a gap between the top of the door and the under side of the head of the door frame. This is to allow sufficient movement upward so the pin in the door hinges can slip out of the hinge-blades screwed to the side of the door frame or style.
The current National Construction Code requirements (2015) for construction of sanitary compartments states the following:
Clause 184.108.40.206 Construction of sanitary compartments
The door to a fully enclosed sanitary compartment must–
(a) open outwards; or
(b) slide; or
(c) be readily removable from the outside of the compartment,
220.127.116.11 requires means of removing an unconscious occupant from a fully enclosed sanitary compartment. If the enclosure has gaps that are large enough to allow access for a person into the sanitary compartment, the compartment is not considered enclosed for the purpose of this clause.
Therefore, unless there is a clear space of at least 1.2 m, measured in accordance with Figure 18.104.22.168, between the closet pan within the sanitary compartment and the doorway, then we recommends the use of Stainless Steel Lift-Off Hinges.