Advisory Note released on the intent of the timber framing concessions
A new Advisory Note for Class 2 and 3 buildings: Concessions for use of timber framing and/or non-combustible materials has been released.
It explains the intent of the concession in Specification C1.1, Clauses 3.10 (a) and 4.3 (a) of NCC Volume One.
The Advisory Note outlines the concessions which, in certain circumstances, allow for the use of timber framing where otherwise a non-combustible material is required. For example, the concession is not intended to permit the use of combustible cladding on external walls.
The concessions apply to residential apartment buildings (Class 2) and residential parts of hotels, motels, boarding houses and the like (Class 3), typically with a height between 2 and 4 storeys. Single dwellings (Class 1) regardless of their height, and some Class 2 or Class 3 buildings of 2 storeys in height, are not subject to the non-combustibility requirements and therefore the concessions are not relevant to these buildings.
The Advisory Note is available from the Resource Library.