Board · Sizes pending
Timber-Based Composite — indicative fig. C·53
Fire Combustible CombustibleEmbodied carbon -1.10kgCO₂e/kg Stores carbonCompressive 35MPa StructuralDesign life 40yr
Mass timber panels formed by nail-fastening dimensional lumber on edge; commonly used for floors and roofs with panel thicknesses tied to lumber size.
01 Physical
Density 430-545kg/m3
Specific gravity 0.35-0.48
Porosity 65%
UV resistance Low
Chemical resistance Limited
pH tolerance 4.5-7.5
Surface roughness 12.5µm
02 Mechanical
Tensile strength 14MPa
Compressive strength 35MPa
Flexural strength 64-85MPa
Shear strength 2.4MPa
Poisson's ratio 0.4
Creep resistance Moderate
03 Thermal
Thermal conductivity 0.1154W/m·K
Specific heat 2300J/kg·K
Thermal expansion 4.5×10⁻⁶/°C
04 Compliance & Fire First question
Combustibility class Combustible
Fire resistance level 30-180
Ignition temp 300°C
Smoke dev. index 750
05 Sustainability & Health
Embodied carbon -1.1
Carbon footprint -50
Embodied energy 3MJ/kg
Recyclability 100%
Recycled content 0%
Renewable content 100%
Circular score 8.5
VOC emissions 0.5
Toxicity rating Non-toxic
LEED contribution 4
06 Durability · Cost · Logistics
Expected lifespan 40+
Maintenance interval 5-10
Material cost (range) 80-120
Material cost (per unit) 100
Lead time 8-12 weeks
Lifecycle cost 150-200
Annual maintenance 2-5
Market availability Import only
07 Assessment
Advantages
- Simple manufacturing process - no adhesives required
- Can be fabricated on-site or prefabricated
- Excellent structural properties with Australian eucalyptus
- Carbon negative over lifecycle (-40 to -60 kg CO₂e/m²)
- 100% recyclable and biodegradable
- Lower cost potential compared to CLT
- Good thermal performance (R0.77-2.48 depending on thickness)
- Compatible with existing timber construction skills
- FSC/PEFC certification available
Constraints
- No current Australian manufacturers
- Poor acoustic performance without enhancement
- AS 2082 visual grading unsuitable for young plantation eucalyptus
- Requires moisture content control below 15%
- Limited fire resistance without protection
- UV protection required for exterior applications
- No Australian-specific design guides available
- Dimensional stability concerns with moisture variation
- Requires acoustic enhancement for NCC compliance in multi-residential
08 Applications
A1 Structural floors (89-286mm thickness)
A2 Roof decking (64mm minimum)
A3 Load-bearing walls
A4 Elevator shafts
A5 Heritage building renovations
A6 Industrial warehouse construction
A7 Educational facilities
A8 Multi-residential buildings (with acoustic treatment)
A9 Exposed ceiling applications
09 Sources & Standards
Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.