Our Regulatory Information Report RIR 41117.10 shows that all commonly used timbers fall into Group 3, including the Tasmanian oak/Vic ash species (alpine ash, mountain ash and messmate). A copy of RIR 41117.10 can be downloaded from our website via this link https://www.woodsolutions.com.au/resources/standards-codes/fire-test-reports.

‘Australian wormy chestnut’ is a marketing name. One commercial website advises that a parcel of wormy chestnut could include any or all of the following: Eucalyptus obliqua (messmate), Eucalyptus sieberi (silvertop ash) and Eucalyptus fastigata (brownbarrel).