Exit signs and directional exit signs are significant essential safety measures requiring to be operational during a power failure and in particular, a fire situation. Exit sign positioning must be clearly visible to persons approaching the exit during an emergency evacuation. Exit signs are nominated by the building surveyor/ building certifier in the essential safety measures schedule/ determination.
Building Code of Australia
The Building Code of Australia clause E4.8 Design and operation of exit signs, requires exit signs to be installed in accordance with AS 2293.1-2005 Emergency escape lighting and exit signs for buildings – System design, installation and operation for building approvals. Clause E4.5 to E4.8 of the BCA sets out the installation criteria for exit signs in exit paths, e.g. clearly visible and above or adjacent to exit doors. Directional exit signs must be located to clearly demonstrate the egress direction of exit travel to a required exit.
The following illustration depicts exit sign mounting heights.