This Specification sets out the requirements in relation to fire hazard properties of materials and assemblies used in Class 2 to 9 buildings other than floor, wall and ceiling covering and linings. Specification 7 Clause S7C7 [2019: Spec C1.10: 7] places limits on the Spread-of-Flame Index and Smoke-Developed Index for various types of buildings and locations within these buildings. The Spread-of-Flame Index and Smoke-Developed Index for some commonly available timber species can be found in Table 1.
The Spread-of-Flame Index and Smoke-Developed Index for some commonly available timber species in Table 1 have been sourced from the National Construction Code Volume One, Deemed-to-Satisfy referenced document AS1684.2-2021 Residential timber-framed construction, Appendix G – Table G1 Timber Species and Properties.
Table 1: Spread-of-Flame Index and Smoke-Developed Index
| Common Name | Spread-of-Flame Index (0-10) | Smoke-Developed Index (0-10) |
|---|---|---|
| Ash, Alpine | 8 | 3 |
| Ash, Mountain | 8 | 3 |
| Ash, Silvertop | 6 | 3 |
| Ash, Victorian | 8 | 3 |
| Baltic, Red | 9 | 3 |
| Baltic, White | 9 | 4 |
| Blackbean | 8 | 3 |
| Blackbutt | 7 | 3 |
| Blackbutt (plywood) | 7 | 3 |
| Blackbutt, New England | 7 | 3 |
| Blackwood | 9 | 3 |
| Bloodwood, Red | 8 | 3 |
| Box, Brush | 7 | 3 |
| Box, Grey | 4 | 3 |
| Brownbarrel | 8 | 3 |
| Brushbox | 7 | 3 |
| Cedar, Red, Australian | 8 | 3 |
| Cedar, Red, Western | 10 | 4 |
| Cypress | 8 | 3 |
| Fir, Douglas (Oregon) | 9 | 3 |
| Fir, Hem | 9 | 3 |
| Gum, Blue, Sydney | 6 | 3 |
| Gum, Grey, Mountain | 0 | 3 |
| Gum, Red, River | 3 | 3 |
| Gum, Rose | 7 | 3 |
| Gum, Rose (plywood) | 8 | 3 |
| Gum, Shining | 8 | 4 |
| Gum, Spotted | 3 | 3 |
| Gum, Spotted (plywood) | 7 | 3 |
| Hemlock, Western | 9 | 3 |
| Ironbark, Grey | 0 | 3 |
| Ironbark, Red | 5 | 3 |
| Jarrah | 6 | 3 |
| Kapur | 7 | 3 |
| Karri | 7 | 3 |
| Lauan | 9 | 4 |
| Mahogany, Philippine | 9 | 4 |
| Mahogany, Red | 5 | 3 |
| Mahogany, White | 0 | 3 |
| Maple, Pacific | 9 | 4 |
| Meranti | 9 | 4 |
| Merbau (Kwila) | 0 | 5 |
| Messmate | 5 | 3 |
| Oak, Tasmanian | 8 | 3 |
| Oak, Tulip | 6 | 2 |
| Pine, Canada | 7 | 3 |
| Pine, Cypress | 8 | 3 |
| Pine, Hoop | 7 | 2 |
| Pine, Hoop (plywood) | 9 | 3 |
| Pine, Klinki | 9 | 3 |
| Pine, Radiata | 8 | 3 |
| Pine, Slash | 8 | 3 |
| Pine, Slash (plywood) | 8 | 3 |
| Ramin | 7 | 3 |
| Redwood, Californian | 9 | 4 |
| Seraya | 9 | 4 |
| Stringybark, Silvertop | 6 | 3 |
| Stringybark, Yellow | 7 | 3 |
| Tallowwood | 5 | 4 |
| Teak | 9 | 5 |
| Turpentine | 6 | 3 |
| Walnut, Queensland | 7 | 3 |
| Walnut, Yellow | 7 | 1 |
Note:
Nominal thickness of samples tested: red baltic 21.5 mm; white baltic 44mm; plywoods 12mm; mountain grey gum 15 mm; silvertop ash, New England blackbutt, red bloodwood, grey box, brownbarrel, Sydney blue gum, river red gum, rose gum, shining gum, grey ironbark, red ironbark, karri, kwila, slash pine silvertop stringybark, yellow stringybark and turpentine 19mm.