Emergency Warning and Intercommunication Systems
The Building Code of Australia requires high rise buildings to have sound and intercom systems (SSIS) for emergency purposes. The installation is required by the Building Code of Australia when the building height exceeds 25m in effective height and a number of other criteria for class 3, 9a and 9b buildings. Previous to the sound and intercom systems they were known as emergency warning and intercommunication systems (EWIS). Either a sound and intercom systems or emergency warning and intercommunication systems would be nominated by abuilding surveyor/ building certifier in an essential safety measures determination/ schedule.
Building Code of Australia
The Building Code of Australia requires, emergency warning and intercommunication systems (EWIS) to comply with AS 1851.10-1989 Maintenance of fire protection equipment – Emergency warning and intercommunication systems under a building approval. An emergency warning and intercommunication systems (EWIS) installation comprises a master control panel usually interfaced to the buildings fire panel, warden intercom points at each exit for egress, manual call points, a master warden control point and warning speakers distributed throughout the building to achieve a defined level of audibility above background noise.
The following photograph depicts an EWIS panel installed in the building.