MODFLOORPLUS
MODFLOORPLUS Light Gauge Steel Chassis System
An Engineered Steel Chassis for Modern Modular Construction
MODFLOORPLUS is a fully engineered light gauge steel chassis system without any requirement for structural steel developed from over three decades of international light gauge steel framing manufacture and 15 years of modular housing experience.
Designed to replace timber and hot rolled structural steel chassis, MODFLOORPLUS enables faster assembly, reduced labour dependency and scalable modular construction up to four levels using fully integrated light gauge steel systems.
Manufactured using the STEELFAST SFT300 multi-profile rollformer, MODFLOORPLUS integrates patented technology developed from practical manufacturing knowledge — not theoretical design.
Proven International Development
The engineering principles behind MODFLOORPLUS were shaped by decades of international steel framing and modular construction experience.
Operations established in Orlando, Florida introduced light gauge steel framing into hurricane-prone markets. Steel framing systems were deployed across southern Florida, Georgia, Alabama and the Bahamas, including redevelopment projects following Hurricane Katrina.
Modular housing manufactured in Florida was shipped internationally for installation across multiple island locations.
This experience in high-wind, corrosive and demanding structural environments directly informs the design integrity of MODFLOORPLUS today.
+15
YEARS OF DEVELOPMENT
Integrated Service Penetrations
Pre-punched service holes allow electrical, hydraulic and ducting services to be installed during manufacture rather than onsite.
Faster Assembly
MODFLOORPLUS eliminates welding entirely. Chassis can be assembled in under three hours using basic hand tools and minimal training.
Designed for Transport & Structural Stability
Designed for transportable lengths
Up to 5.3 metre widths
Reduced on-site rectification
Independent testing demonstrates deflection reduced to 2–3mm
Why Modular Builders Are Replacing Traditional Chassis Systems
Reduced Labour & Manufacturing Complexity
No heavy structural beams
No extensive bracing requirements
No skilled welding labour required
No robotic automation required
Timber Chassis | Traditional Hot Rolled Steel | MODFLOORPLUS |
|---|---|---|
Moisture risk | Requires welding | No welding required |
Potential warping | Heavy structural beams | Termite proof |
Ongoing maintenance | Skilled labour required | Assembled in under 3 hours |
Termite risk | Cutting & measuring onsite | Factory-cut precision |
Susceptible to moisture | Higher transport weight | Lightweight corrosion-resistant steel |
MODFLOORPLUS vs
Traditional Steel & Timber Chassis
Independent Structural Performance
Strength and rigidity have been validated through independent testing, demonstrating minimal deflection and eliminating the need for excessive bracing.
All systems are engineered and submitted for sign-off under relevant regulations prior to final detailing. Approval certificates are issued where required.
If engineer inspection of assembled systems is required, this can be conducted onsite or via remote video inspection.
View Independent Load Test Report
Advanced Corrosion Protection – ZinMag ZM310 Steel
MODFLOORPLUS is manufactured from ZinMag ZM310 1.95BMT G350 steel with average yield strength exceeding 400MPa.
ZinMag ZM310 is a hot-dipped zinc-aluminium-magnesium alloy coated steel designed to deliver superior corrosion resistance compared to standard galvanised coatings.
Independent Salt Spray Testing
ZinMag ZM310 has been independently tested by Modfloor Pty Ltd in Australia to ASTM B117-19. No red or white rust or delamination was observed after 2,000 hours of salt spray testing.
Salt spray testing has been conducted by multiple international organisations confirming superior corrosion resistance performance.
Superior Corrosion Resistance
ZinMag ZM310 demonstrates:
Up to 10x greater corrosion resistance compared to standard galvanised steel
Superior performance in marine, chloride and ammonia environments
Improved resistance in highly alkaline environments (pH 10–13)
Extended coating life through magnesium stabilisation
Self-Repairing Cut Edge Protection
The magnesium content creates a stable crystalline film across the metal surface, providing active corrosion protection on scratches and exposed cut edges during manufacture and installation.
Corrosion Warranty
MODFLOORPLUS chassis systems manufactured from ZinMag ZM310 steel carry a corrosion warranty of up to 50 years (subject to installation location and conditions).
Warranty durations vary depending on proximity to marine or industrial environments and are subject to installation compliance requirements.
Structural Warranty & Compliance
MODFLOORPLUS chassis systems carry a 20-year structural warranty from the date of dispatch when installed and maintained in accordance with guidelines.
Manufactured to:
AS1397:2021 coating mass ZM300 or heavier
ISO 9223 Category 3 fastener compatibility
NASH Best Practice Handbook guidance
National Construction Code compliance (subject to installation conditions)
MODCORE Integrated Subfloor System
MODCORE is a lightweight SIP-based insulation system installed within the MODFLOORPLUS chassis. Engineered to AS 1170.11 and non-combustible to AS 1530.1, MODCORE eliminates the need for additional subfloor materials.
Performance & Installation Advantages
Replaces or enhances subfloor insulation
Replaces traditional flooring material
Moisture resistant
Termite proof
Eliminates thermal bridging
No additional building height required
Faster installation reduces labour costs
Stable during transport
The continuous insulation core improves thermal performance and reduces reliance on secondary insulating layers.
Compatible with most floor finishes including carpet, vinyl, tiles and timber
Download MODCORE Technical Specifications
MODFLOORPLUS Manufacturing & Licensing Model
MODFLOORPLUS is manufactured using the STEELFAST SFT300 multi-profile rollformer under patented tooling.
Manufacturing licences may be available for defined territories and may include:
Architectural plan conversion
Engineering sign-off
Machine-ready detailing
Ongoing technical support
Integrated manufacturing guidance
Enquire About Territory Availability
Technical Documentation & Engineering Resources
The following engineering documentation is available for review: