Profiles · Sizes pending
Timber — indicative fig. O·17
Fire Combustible CombustibleEmbodied carbon 0.16kgCO₂e/kg LowCompressive 55-70MPa StructuralDesign life 60yr
Premium Australian eucalyptus hardwood structural members graded F17-F34 per AS 2082. Density 950 kg/m3, MOE 19.8 GPa, MOR 142 MPa, Janka 11.0 kN, Durability Class 1, Joint Group JD1. For load-bearing posts, beams, battens, pergola framing, and heavy timber construction.
01 Physical
Density 950kg/m3
Specific gravity 0.95
Porosity 8-12%
Water absorption 10-15%
Hardness 11.0kN
UV resistance Moderate
Chemical resistance Good
pH tolerance 4-8pH
02 Mechanical
Tensile strength 100-130MPa
Compressive strength 55-70MPa
Flexural strength 142MPa
Impact resistance 80-110J/m
Creep resistance Excellent
03 Thermal
Thermal conductivity 0.19-0.21W/mK
Specific heat 1400-1600J/kgK
Thermal expansion 0.003-0.005mm/mK
04 Compliance & Fire First question
Combustibility class Combustible — Group 3 (AS 5637.1), BAL-29 compliant (AS 3959)
Fire resistance level 60-120minutes
Ignition temp 300-350degC
Flame spread index 100-150FSI
Smoke dev. index 150-250SDI
Heat release rate 150-250kW/m2
05 Sustainability & Health
Embodied carbon 150-350 (gross); net negative including sequestrationkg CO2-eq/m3
Carbon footprint -500 to -700 (net, including sequestration)kg CO2-eq/m3
Embodied energy 500-1500MJ/m3
Water footprint 5-20L/kg
Recyclability 95%
Recycled content 0%
Renewable content 100%
Circular score 9/10
VOC emissions <E1 (very low)ug/m3
Toxicity rating Non-toxic (untreated heartwood)
LEED contribution 6-9points
06 Durability · Cost · Logistics
Expected lifespan 60-100+years
Maintenance interval 5-10years
Warranty period 25years
Material cost (range) 8-65 per lineal metre (size dependent)AUD/lm
Material cost (per unit) 3500-6000AUD/m3
Lead time 5-35days
Lifecycle cost 200-450AUD/m2
Annual maintenance 0.20-2.00AUD/lm/year
Market availability Good (standard sizes); Moderate (large sections)
07 Assessment
Advantages
- Exceptional structural grades F17-F34 seasoned (AS 2082) — among strongest Australian timbers
- Strength Group SD2 / Joint Group JD1 — superior connection performance
- Durability Class 1 above ground (40+ years without treatment, AS 5604)
- Natural termite resistance (heartwood) — no chemical treatment required above ground
- BAL-29 bushfire compliance per AS 3959 Appendix F
- Janka 11.0 kN — excellent fixing retention and impact resistance
- 100% Australian grown from sustainably managed native forests
- Beautiful natural appearance for exposed structural applications
- Carbon-sequestering material (~850 kg CO2/m3 stored)
- Long structural service life 60-100+ years with proper design
Constraints
- Premium pricing — F27 structural significantly more expensive than treated pine framing
- High density (950 kg/m3) increases dead load in structural calculations
- Pre-drilling MANDATORY for all connections — direct nailing/screwing causes splitting
- Limited availability in large post sections (>140x140mm) — often mill-order only
- Significant tool wear — tungsten-carbide blades essential for all cutting/drilling
- Heavy material requires mechanical handling for large sections (lifting equipment)
- Structural engineering specification required for load-bearing applications
- Sapwood susceptible to lyctid borer — must be excluded or treated per AS 1604
08 Applications
A1 Structural posts and columns Load-bearing vertical members for pergolas, verandahs, carports, and building frames. 90x90mm to 140x140mm+ sections.
A2 Structural beams and bearers Horizontal load-bearing members for floor systems, roof structures, and lintels. 190x45mm to 290x45mm sections.
A3 Pergola and pavilion framing Post-and-beam construction for outdoor entertaining structures. Exposed structural aesthetic.
A4 Deck substructure (bearers and joists) Structural support framework for hardwood decking systems. F27 grade for span and load requirements.
A5 Structural battens and purlins Secondary structural members for roof and wall framing. 70x35mm to 90x45mm sections.
A6 Exposed feature beams (interior and exterior) Architectural structural elements where both load-bearing and aesthetic performance are required.
A7 Bushfire zone structural framing (BAL-29) Structural framing for buildings in bushfire-prone areas requiring BAL-29 compliant structural members.
A8 Heritage restoration structural members Matching replacement structural timber for heritage building restoration and conservation.
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.