Profiles · 19–32 mm
Timber — indicative fig. O·16
Fire Combustible CombustibleEmbodied carbon 0.16kgCO₂e/kg LowCompressive 55-70MPa StructuralDesign life 50yr
Premium Australian eucalyptus hardwood with exceptional structural properties and natural durability. Density 950 kg/m3, Janka 11.0 kN, MOE 19.8 GPa, Durability Class 1 above ground, BAL-29 fire compliance, stress grades to F34. Ideal for structural cladding and screening in all Australian climate zones.
01 Physical
Density 950kg/m3
Specific gravity 0.95
Porosity 8-12%
Water absorption 10-14%
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 30-60minutes
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 (new); up to 100 (reclaimed)%
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 50-80+years
Maintenance interval 1-5years
Warranty period 15-25years
Material cost (range) 95-300+AUD/m2
Material cost (per unit) 2500-8000AUD/m3
Lead time 5-28days
Lifecycle cost 180-400AUD/m2
Annual maintenance 0.50-8AUD/m2/year
Market availability Good
07 Assessment
Advantages
- Exceptional structural strength — Strength Group SD2, stress grades F17-F34 (seasoned, AS 2082)
- Durability Class 1 above ground (40+ years service life per AS 5604)
- BAL-29 bushfire compliance without treatment at 18mm+ thickness (AS 3959 Appendix F)
- Janka hardness 11.0 kN — superior impact and abrasion resistance
- Natural termite resistance (heartwood)
- 100% Australian grown and processed from sustainably managed native forests
- Distinctive wavy grain with prized fiddleback figuring
- Excellent weathering characteristics — silvers gracefully when left unfinished
- Carbon-sequestering material — stores approximately 850 kg CO2/m3
- Long service life 50-80+ years with minimal maintenance
Constraints
- Premium pricing ($115-300+ AUD/m2 depending on profile and grade)
- High density (950 kg/m3) mandates pre-drilling for all fixings
- Natural colour variation from light brown to dark chocolate requires sorting for consistent facades
- Interlocked wavy grain causes machining difficulties and potential tearing during planing
- Sapwood susceptible to lyctid borer attack — must be excluded from exposed applications
- High density causes accelerated tool wear — tungsten-carbide blades required
- Seasonal movement requires 3-5mm expansion gaps and proper ventilation detailing
- Heavy material increases handling difficulty and transport costs
08 Applications
A1 External wall cladding (horizontal shiplap/weatherboard) Premium hardwood cladding for residential, commercial, and institutional facades. BAL-29 compliant for bushfire zones.
A2 Privacy screening (vertical batten systems) Vertical batten screens with 16-52mm gaps for privacy, light control, and airflow. BAL-29 rated.
A3 Pergola and outdoor structure cladding Structural screening and cladding for pergolas, carports, and outdoor entertaining areas.
A4 Bushfire-prone area construction (BAL-12.5 to BAL-29) Approved timber cladding for bushfire zones without additional fire-retardant treatment at 18mm+ thickness.
A5 Commercial and institutional facades Architectural feature cladding for schools, libraries, community centres, and commercial buildings.
A6 Interior feature walls and ceiling linings Internal timber lining for feature walls, ceiling applications, and architectural detail.
A7 Fencing and boundary screening Durable hardwood fencing with natural termite resistance and long service life.
A8 Coastal construction applications Suitable for marine-adjacent environments with stainless steel fixings and appropriate detailing.
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.