Atlas index
Board · 150–400 mm
Cementitious — indicative fig. M·27

Factory-manufactured prestressed concrete floor planks with longitudinal voids, providing efficient structural flooring systems for spans up to 20m with fire ratings up to 4 hours

01 Physical

Density 1750kg/m³
Specific gravity 2.35
Porosity 35%
Water absorption 5%
Hardness 7Mohs
UV resistance Excellent
Chemical resistance Good
pH tolerance 5 – 11
Surface roughness 6μm

02 Mechanical

Tensile strength 3.5MPa
Compressive strength 45MPa
Flexural strength 6.5MPa
Shear strength 0.65MPa
Poisson's ratio 0.2
Impact resistance High
Creep resistance 2creep coefficient

03 Thermal

Thermal conductivity 1.4W/m·K
Specific heat 880J/kg·K
Thermal expansion 10×10⁻⁶/°C

04 Compliance & Fire First question

Combustibility class Non-combustible
Fire resistance level 120/120/120minutes
Ignition temp null°C
Flame spread index 0
Smoke dev. index 0
Heat release rate 0kW/m²

05 Sustainability & Health

Embodied carbon 85kgCO₂e/m²
Carbon footprint 320kgCO₂e/m³
Embodied energy 2.1GJ/m³
Water footprint 180L/m²
Recyclability 100%
Recycled content 15%
Renewable content 0%
Circular score 7.5/10
VOC emissions 0g/L
Toxicity rating Non-toxic
LEED contribution 3points

06 Durability · Cost · Logistics

Expected lifespan 100years
Maintenance interval 10years
Warranty period 10years
Material cost (range) 180 – 350AUD/m²
Material cost (per unit) 250AUD/m²
Lead time 2-6weeks
Lifecycle cost 8.5AUD/m²/year
Annual maintenance 0.5AUD/m²/year
Market availability Excellent

07 Assessment

Advantages

  • Rapid installation up to 1000m² per day
  • No propping required during construction
  • Immediate working platform
  • Long clear spans reducing column requirements
  • Excellent fire resistance (1-4 hours)
  • Superior acoustic performance (STC 50-57)
  • 40% less concrete than solid slabs
  • High thermal mass for passive cooling
  • Factory quality control to ISO 9001:2015
  • Service ducts within cores
  • Smooth soffit finish suitable for direct painting

Constraints

  • Limited flexibility for on-site modifications
  • Requires crane for installation
  • Transport limitations for remote sites
  • Camber variation between units
  • Limited capacity for large penetrations
  • Initial capital cost higher than in-situ
  • Acoustic bridging at joints requires attention
  • Specialist design knowledge required

08 Applications

A1 Multi-storey commercial buildings
A2 Residential apartments and units
A3 Car parks and parking structures
A4 Industrial warehouses and mezzanines
A5 Educational facilities
A6 Healthcare buildings
A7 Retail complexes
A8 Bridge decks and infrastructure
A9 Stormwater detention vault lids
A10 Agricultural storage facilities

09 Sources & Standards

Sources pending — citations for this material are not yet recorded. Verify all figures against manufacturer data and current standards before specifying.

MATERIALS ATLAS · CL·AD M·27 · data indicative — verify per project