The objective of this document is to provide system designers and installers with a set of requirements for the design, installation and commissioning of wall wetting sprinkler systems to provide protection to the unprotected opening infills of a building subject to the limitations detailed in this document.

NOTE: Atrium protection details are contained in the NCC.

The objective of this revision is to update the type of sprinklers (previously referred to as drenchers) to be installed, including their orientation, to enhance the efficacy of the wall wetting sprinkler system.

The AS 2118 suite of sprinkler Standards is structured into two groups: systems (AS 2118 series) and components (AS 4118 series). A list of all parts in the AS 2118 and AS 4118 series can be found in the Standards Australia online catalogue.

The major changes in this edition are as follows:
(a) Alignment with NCC terminology.
(b) Update to technical equipment in line with recent research testing and results.
(c) Update of design criteria in line with recent research testing and results.
(d) Clarification on the water supply requirements for different applications of this document.
(e) Limit of protection provided by wall wetting sprinklers to 40 kW per m2 in response to recent research testing and results.

The terms “normative” and “informative” are used in Standards to define the application of the appendices to which they apply. A “normative” appendix is an integral part of a Standard, whereas an “informative” appendix is only for information and guidance.

A note to a clause in this document is designed to draw attention to a condition that needs to be considered when applying the clause; for example, a reminder that another Standard needs to be consulted which could conflict with the clause.

A commentary is an explanation as to why the clause was written or developed and is primarily intended to assist with how the clause would be applied in practice.