ComFlor 80 (CF80) Composite Floor Decking
ComFlor 80 (CF80) is a deep profile composite floor decking system designed for projects requiring longer spans and improved structural efficiency. With an 80mm trapezoidal profile and 600mm cover width, it reduces the need for secondary beams, helping to lower overall structural costs.
ComFlor 80 prices start from £19/m² (supply only), making it a cost-effective solution for commercial, residential, and mixed-use developments where performance and speed of installation are critical.
ComFlor 80 prices start from £19/m² (supply only), depending on specification, gauge, and order volume.
Comflor 80 Key Benefits
- 80mm deep composite profile — ideal for longer spans and reduced secondary beam requirements
- 600mm cover width — efficient installation with fewer sheets required per m²
- Improved spanning capability — reduces steelwork costs across the structure
- Lower concrete volume — optimised slab design helps minimise overall material usage
- Fast installation — lightweight sheets allow quick handling and fixing on site
- Round-shouldered profile design — enables easy service integration without additional drilling
- Fire performance options — suitable for a range of slab depths and building regulations
- Pre-finished soffit options available — ideal for exposed ceiling applications
- Available in multiple gauges — typically 0.9mm, 1.0mm, and 1.2mm to suit structural requirements
- CE marked and compliant — designed in accordance with BS EN standards and Eurocode
Comflor 80 Sectional Properties
| Nominal thickness | Design thickness | Grade | Steel area (mm²/m) | Profile weight (kN/m²) | Neutral axis (mm) | Inertia (cm⁴/m) |
|---|---|---|---|---|---|---|
| 0.9mm | 0.86mm | S350 | 1,382 | 0.11 | 44.86mm | 165.4 |
| 1.0mm | 0.96mm | S350 | 1,542 | 0.12 | 44.90mm | 181.3 |
| 1.2mm | 1.16mm | S350 | 1,864 | 0.15 | 45.01mm | 213.1 |
Section properties conform to BS 5950 and Eurocode. Source: ComFlor 80 product datasheet.
Panel Weight Reference
Approximate weight of a single ComFlor 80 sheet at 3 metres length and 600mm cover width (panel area = 1.80 m²). Despite being 20mm deeper than ComFlor 60, the profile weight per m² is comparable, and handling characteristics on site are essentially the same.
| Gauge | kg/m² | Approx panel weight (3m sheet) |
|---|---|---|
| 0.9mm | 11.2 | ~20 kg |
| 1.0mm | 12.2 | ~22 kg |
| 1.2mm | 15.3 | ~28 kg |
Concrete Volume per m²
Eurocode density values: normal weight concrete (NWC) wet 25 kN/m³, dry 24 kN/m³; lightweight concrete (LWC) wet 20 kN/m³, dry 19 kN/m³. Deck and mesh weight not included. Ponding allowance not included. Source: ComFlor 80 datasheet (Eurocode values).
| Slab depth (mm) | Concrete vol (m³/m²) | Wet NWC (kN/m²) | Dry NWC (kN/m²) | Wet LWC (kN/m²) | Dry LWC (kN/m²) |
|---|---|---|---|---|---|
| 130 (min, LWC only) | 0.085 | n/a | n/a | 1.70 | 1.62 |
| 140 (min, NWC) | 0.095 | 2.38 | 2.28 | 1.90 | 1.81 |
| 150 | 0.105 | 2.63 | 2.52 | 2.10 | 2.00 |
| 160 | 0.115 | 2.88 | 2.76 | 2.30 | 2.19 |
| 170 | 0.125 | 3.13 | 3.00 | 2.50 | 2.38 |
| 180 | 0.135 | 3.38 | 3.24 | 2.70 | 2.57 |
| 200 | 0.155 | 3.88 | 3.72 | 3.10 | 2.95 |
| 220 | 0.175 | 4.38 | 4.20 | 3.50 | 3.33 |
| 250 | 0.205 | 5.13 | 4.92 | 4.10 | 3.90 |
Fire Performance
Fire design is in accordance with SCI NCCI PN005 (Eurocode) and SCI Publication P359. Two fire design methods are available within the ComFlor 9 design software: the Mesh and Deck Fire Method (mesh reinforcement only) and the Bar Fire Method (reinforcement bars in each deck trough, positioned 25mm above the trough base). The method required depends on the span, slab depth, fire period, and applied load for your specific project.
The minimum slab depths in the table below are indicative for the Mesh and Deck Fire Method with normal weight concrete. At longer spans or higher fire periods, trough bar reinforcement will typically be required and minimum slab depths increase accordingly. The 140mm NWC minimum is a hard floor for this profile. Contact our technical team for project-specific confirmation before proceeding to design.
| Fire rating | Indicative min slab depth, NWC | Indicative min slab depth, LWC |
|---|---|---|
| 1 hour | 140mm | 130mm |
| 1.5 hours | 155mm | 145mm |
| 2 hours | 165mm | 155mm |
| 3 hours | 195mm | 180mm |
| 4 hours | 215mm | 200mm |
Indicative values only. Actual minimum slab depths depend on span, applied load, gauge, fire design method, and reinforcement specification. Trough bar reinforcement is typically required at longer spans and higher fire periods. Note: the 140mm slab depth requires mesh at 25mm cover rather than the standard 30mm. Always verify against project-specific span and fire tables. Contact our team for confirmation.
Comflor 80 Finishes and Options
- Galvanised Z275 (Galvatite) — standard coating to BS EN 10346 S350GD+Z275, suitable for internal floors in non-aggressive environments
- Colorcoat FD pre-finished soffit — factory-applied pre-finished colour coating to the soffit, giving a bright, attractive finish where no suspended ceiling is specified. Available in a range of colours. Ideal for Grade A commercial office and industrial fit-out where the deck soffit will be visible.
ComFlor 80 vs ComFlor 60 – Which Should You Specify?
The difference between ComFlor 60 (CF60) and ComFlor 80 (CF80) is profile depth and span capability. ComFlor 60 is used for standard spans, while ComFlor 80 allows longer spans and reduces secondary beam requirements. Choosing between them depends on span requirements, structural design, and overall project efficiency.
When to Use ComFlor 60
ComFlor 60 is ideal for:
- Standard span applications
- Residential and smaller commercial projects
- Designs where secondary beams are already part of the structure
- Projects prioritising lower upfront material cost
When to Use ComFlor 80
ComFlor 80 is better suited for:
- Longer span requirements
- Projects aiming to reduce secondary beam counts
- High-load commercial or mixed-use developments
- Situations where structural efficiency impacts overall cost
| Feature | ComFlor 60 (CF60) | ComFlor 80 (CF80) |
|---|---|---|
| Profile depth | 60mm | 80mm |
| Span capability | Standard spans | Longer spans |
| Beam requirements | More secondary beams | Fewer beams required |
| Concrete volume | Moderate | Reduced overall volume |
| Installation speed | Fast | Faster on large areas |
| Best for | Residential / small commercial | Large commercial / long spans |
| Cost efficiency | Lower upfront cost | Lower total structural cost |
Key Difference in Simple Terms
- ComFlor 60 = standard, versatile, cost-effective upfront
- ComFlor 80 = fewer beams, longer spans, better overall efficiency
Which One Is More Cost-Effective?
While ComFlor 60 may appear cheaper per m², ComFlor 80 often becomes more economical when:
- Fewer beams are required
- Installation time is reduced
- Concrete and reinforcement are optimised
In most larger projects, the saving comes from the structure, not the sheet price. The right specification depends on your drawings, spans, and load requirements — contact RMD Profiles to review your project and identify whether ComFlor 60 or ComFlor 80 delivers the best value.
Comflor 80 Case Studies
For examples of how ComFlor 80 and other RMD Profiles products have been used on live projects, visit our Projects page.
Typical Applications
- Commercial office and business park developments where reducing secondary beam count is a structural cost priority
- Industrial and logistics buildings requiring long spans at moderate slab depths
- Mixed-use and institutional buildings where M&E service attachment from the soffit is a design requirement
- Architecturally exposed soffit applications using the Colorcoat FD pre-finished option
- Any project where ComFlor 60 span capability has been exhausted and a step-change in bay size is needed without moving to a made-to-order product
Compliance and Standards
- Section properties conform to BS 5950 and Eurocode
- Load and span tables produced to Eurocode requirements; ComFlor 9 software supports both Eurocode and British Standard design
- Fire design in accordance with SCI NCCI PN005 and SCI Publication P359
- Deck material to BS EN 10346 S350GD+Z275
- Anti-crack mesh requirements to BS EN 1994-1-1 Clause 9.8.1(2)
- Supplied in accordance with the BCSA Code of Practice for metal decking and stud welding
Why Choose RMD Profiles?
Since 2009, RMD Profiles has supported thousands of UK contractors, engineers, and developers with dependable roof and floor decking systems. We combine a wide stocked product range with genuine technical expertise, fast-track supply, and a level of service that keeps projects moving.
- One of the widest stocked ranges of structural decking in the UK
- Exclusive Buy Back Scheme for surplus materials
- Certified stud welding and edge trim expertise, in line with BCSA and SCI guidelines
- Fast-track supply with 24-hour delivery available on stocked lines (subject to stock)
- Trusted partner on over 10,000 UK projects, from hospitals to high-rises
Need span tables or fire design confirmation for ComFlor 80?
Our technical team can provide project-specific span and load tables, fire design checks, trough bar requirement confirmations, and layout drawings. Use the chat assistant for a fast initial answer, or contact us directly.
Call 01787 275055, contact us, or email sales@rmdp.co.uk
Further Reading and Guidance
If you want to understand more about how composite floor decking is selected, specified, and installed, the following resources cover the key topics in plain language. Whether you are comparing ComFlor 80 against other long-span options or working through installation and edge details, these guides will move you forward.
- Composite Floor Decking in the UK: Clear Choices, Faster Floors
A practical overview of composite floor decking in the UK market, covering profile selection, span and fire design decisions, and how to match the right product to your project. Useful if you are weighing up ComFlor 80 against ComFlor 60 or TR80+ and want to understand the structural and commercial trade-offs. - The Many Uses of Edge Trim in Metal Deck Construction
Edge trim is one of the most frequently overlooked elements of a floor deck installation, but it plays a critical role in forming the slab edge, containing wet concrete, and contributing to fire compartmentation. This guide covers the types available and when each is appropriate, including applications directly relevant to ComFlor 80.
Not quite what you are looking for? RMD Profiles supplies all the most popular brands of structural metal floor deck on the market, including ComFlor, MetFloor, and the full Firth Steels range. If ComFlor 80 is not the right fit for your project, browse the complete floor decking range to find the profile that works for your span, fire rating, and structural requirements. View the full range of floor metal decking
About Composite Floor Decking
Composite floor decking is the backbone of modern steel-frame floor construction. A composite floor deck acts as permanent formwork during the pour and, once the concrete cures, works compositely with the slab and shear studs to form the finished structural floor. This removes temporary shuttering, speeds construction, and produces a lighter floor than a solid reinforced concrete slab.
ComFlor 80 is the deep 80mm trapezoidal profile in the UK ComFlor range, used where long unpropped spans and reduced secondary beam counts drive down overall structural cost. The shallower ComFlor 60 suits standard spans and lower upfront cost, while re-entrant profiles suit tighter storey heights and higher acoustic demands.
ComFlor 80 is the long-span metal floor decking choice for projects where wider structural bays and fewer beams deliver the best total-cost outcome, with pre-finished Colorcoat FD soffit options for exposed ceilings.
Composite floor decking systems like ComFlor 80 are widely specified in commercial office, industrial, logistics and mixed-use developments across the UK, where span efficiency and structural economy are primary design requirements.
RMD Profiles supplies the full ComFlor, MetFloor and Firth Steels ranges of steel floor decking, backed by technical support and certified stud welding. Whether ComFlor 80 is the right profile or a shallower deck suits your span, our team can confirm the correct system for your fire rating and structural requirements to Eurocode standards.
Frequently Asked Questions
What is ComFlor 80 used for?
ComFlor 80 (CF80) is an 80mm deep trapezoidal composite floor deck used for long-span applications in commercial office, industrial, logistics and mixed-use developments. Its depth allows wider structural bays and fewer secondary beams, lowering overall structural cost.
What is the difference between ComFlor 60 and ComFlor 80?
The main difference is profile depth and span capability. ComFlor 80 is 80mm deep and allows longer spans with fewer secondary beams, making it more efficient for larger projects. ComFlor 60 is 60mm deep and better suited to standard spans and lower upfront cost.
What fire rating does ComFlor 80 achieve?
With normal weight concrete, a 140mm slab achieves 1 hour, 165mm achieves 2 hours, and 215mm achieves 4 hours. Lightweight concrete allows slightly shallower slabs. Trough bar reinforcement is typically required at longer spans or higher fire periods. Fire design follows SCI P359.
Is ComFlor 80 more cost-effective than ComFlor 60?
ComFlor 80 costs more per m² but often delivers a lower total project cost on larger schemes, because it spans further and reduces secondary beam counts, installation time and reinforcement. The saving comes from the structure, not the sheet price.
How much does ComFlor 80 cost?
ComFlor 80 prices start from £19/m² supply only, depending on specification, gauge and order volume. Contact RMD Profiles for a project-specific quote.
Ready to Specify ComFlor 80?
Contact RMD Profiles today to discuss your composite floor decking requirements. Our team provides technical support, span and load tables, fire design confirmation, and competitive pricing on all ComFlor products.
