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AUST – HENDRY building surveyors advise that the Building Code of Australia in Part A1 Interpretation contains Clause A1.1 Definitions. Open-deck carpark is a defined term for the use in the Building Code of Australia. Some clients have requested a further expansion on this definition.

Building Code of Australia: Clause A1.1 – Issue

What are the requirements for a carpark to be classified as an open-deck carpark?

Building Code of Australia: Clause A1.1 – Explanation

Open-deck carpark means a carpark in which all parts of the parking storeys are cross ventilated by permanent unobstructed openings in not fewer than two opposite or approximately opposite sides and: (a) each side that provides ventilation is not less than 1/6 of the area of any other side; and (b) the openings are not less than ½ of the wall area of the side concerned. The multi storey carparks can use open voids through the building to not only provide ventilation but also to cause the carpark to be defined as an open-deck carpark in order to delete sprinkler protection. Provided the voids are of sufficient width, the building can be considered as being an open-deck carpark. A width of between 3m and 6m, subject to building height, should be considered. Ventilation is intended to comply with Building Code of Australia BCA F4.11 (b) and not AS 1668.2.

BCA Illustrated

BCA Illustrated contains illustrations (each containing an issue, explanation, references and an illustration) in Part A1 Interpretation.

Building Legislation Table

Refer to our Building Legislation table for further information on the building approvals and building compliance.

Further Advice

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