composite / Panelised / Metal Composite Panel
Composite steel deck (e.g., Bondek, Comflor) (0.60mm, 0.75mm, 0.90mm, 1.00mm, 1.20mm BMT)
Profiled steel decking that acts as permanent formwork and tensile reinforcement in composite slabs.
Atlas code
COM-PNL-MET-002
At-a-glance signals
Profiled steel decking that acts as permanent formwork and tensile reinforcement in composite slabs.
Overview
Executive summary
Composite steel decking is a profiled steel sheet used as permanent formwork and tensile reinforcement for composite concrete slabs. LYSAGHT BONDEK is a common Australian profile with 590 mm cover width and 54 mm profile height, manufactured in 0.60-1.00 mm BMT high-tensile steel.
Best when…
- Eliminates need for temporary formwork stripping
- Provides permanent tensile reinforcement
- Reduces construction time significantly
- Creates safe working platform during construction
- Excellent spanning capabilities reducing propping requirements
- Composite action saves concrete and reinforcement costs
- Fire resistance up to 240 minutes with appropriate topping
- 100% recyclable at end of life
- Suitable for all Australian climate zones
- Compatible with various frame types (steel, concrete, masonry)
- Allows service integration in rib cavities
- Reduces overall structural depth
Top advantages
- 01 Eliminates need for temporary formwork stripping
- 02 Provides permanent tensile reinforcement
- 03 Reduces construction time significantly
- 04 Creates safe working platform during construction
- 05 Excellent spanning capabilities reducing propping requirements
Top limitations
- 01 Requires skilled installation for optimal performance
- 02 Initial cost higher than conventional formwork
- 03 Acoustic performance primarily dependent on concrete topping
- 04 Thermal bridging through steel profile
- 05 Limited availability of some thicknesses (0.90mm special order)
Technical
Physical ·9
- Density
- 7850 kg/m³
- Specific gravity
- 7.85
- Porosity
- 0 %
- Water absorption
- 0 %
- Hardness
- 150
- UV resistance
- Excellent // galvanised coating protection
- Chemical resistance
- Good // resistant to alkaline concrete environment
- pH tolerance
- 7-13
- Surface roughness
- 1.5 µm
Mechanical ·6
- Tensile strength
- 550 MPa
- Flexural strength
- 450 MPa
- Shear strength
- 320 MPa
- Poisson's ratio
- 0.3
- Impact resistance
- High // construction loads resistance
- Creep resistance
- Excellent // steel minimal creep
Sustainability & Health
Embodied carbon & energy ·7
- Embodied carbon
- 16.5
- Carbon footprint
- 2.1
- Embodied energy
- 35 MJ/kg
- Water footprint
- 45 L/kg
- Recycled content
- 30 %
- Renewable content
- 0 %
- Circular score
- 85
Compliance & Fire
Fire performance ·5
- Combustibility class
- Non-combustible // AS 1530.1
- Fire resistance level
- 60-240 minutes // depends on slab thickness
- Flame spread index
- 0
- Smoke dev. index
- 0
- Heat release rate
- 0
Cost & Lifecycle
Capex & lead time ·6
- Material cost (range)
- $45-75/m² // 2024 Australian prices
- Material cost (per unit)
- $55/m² // average for 0.75mm BMT
- Lead time
- 2-4 weeks // standard delivery
- Lifecycle cost
- $70-115/m² // 50-year analysis
- Annual maintenance
- $0/m² // no maintenance required
- Market availability
- Readily available // standard stock items
Service life & durability ·3
- Expected lifespan
- 50+ years // with appropriate protection
- Maintenance interval
- None required // maintenance-free
- Warranty period
- Project specific // manufacturer warranties vary
Layer D
Where it's used
Multi-storey commercial buildings
Residential apartment construction
Office buildings and towers
Car park structures
Industrial facilities
Educational institutions
Healthcare facilities
Retail complexes
Hotel and hospitality projects
Infrastructure projects
Mezzanine floors
Bridge deck applications