Infill Panels - InfillPlus®
Big River InfillPlus® is the trusted choice for engineers and builders looking for high-quality infill panels that meet...
About Infill Panels - InfillPlus®
Big River InfillPlus® is the trusted choice for engineers and builders looking for high-quality infill panels that meet the rigorous demands of modern construction. Combining engineered timber plywood with a bonded fibre cement backing, InfillPlus® delivers strength, safety, and long-term performance in bridge and infrastructure applications.
Engineered for Performance and Safety
Designed in compliance with AS/NZS 2269 and third-party verified by Advanced Bridge Engineering Systems, InfillPlus® ensures that every project benefits from reliable structural integrity. The addition of a 4.5mm fibre cement sheet protects against timber fibre breakdown, prevents blockage of girder drainage ports, and reduces the risk of tannin staining on concrete surfaces.
Key Applications
- Filling the top of concrete girders for cast in situ decking.
- Providing a safe, stable work platform during construction.
- Long-term use in bridge decking panel systems.
Product Characteristic Values For Design (AS 1720.1)
Why Choose InfillPlus® Infill Panels?
Lightweight Yet Strong
At roughly half the weight of all-fibre cement or steel alternatives, InfillPlus® makes handling and installation easier, without sacrificing strength.
Customised Solutions
Available in four thickness options (21mm, 25mm, 30mm, and 33mm) to suit slab depths from 200mm to 800mm, with factory cut-to-size services to reduce on-site cutting.
Sustainable Choice
Manufactured with low embodied energy and responsibly sourced veneers, InfillPlus® offers a greener solution without compromising on durability.
Proven Durability
Bonded with a marine-grade Phenol-Resorcinol adhesive, these panels are fully waterproof, highly stable, and designed to resist moisture absorption during rain or concrete setting.
Safe Work Surface
Engineered for slip-resistance and tested for dynamic loading, InfillPlus® provides a reliable platform for workers, improving jobsite safety.
Experience You Can Trust
With decades of expertise in engineered timber solutions, Big River Group is recognised for delivering products that meet strict safety, performance, and sustainability standards. All InfillPlus® panels are backed by rigorous quality control, expert technical support, and a reputation built on trust within the Australian construction industry.
Where to Use Infill Panels - InfillPlus®
Renovations & Extensions
Ideal for home renovations, additions, and extensions.
Structural Applications
Suitable for structural and load-bearing applications.
Civil Infrastructure
Engineered for bridges and civil infrastructure projects.
Exterior & Marine
Suitable for exterior and marine-grade applications.
Downloads & Documentation
Frequently Asked Questions
What are Infill Panels used for?
Infill panels like Big River InfillPlus® are designed to fit into the top of concrete girders, allowing cast in situ decking installation while preventing concrete from entering the girder tub.
Why choose InfillPlus® over other infill panel options?
InfillPlus® offers a unique combination of engineered timber and bonded fibre cement, providing lightweight handling, superior durability, and verified compliance with Australian standards.
Can InfillPlus® panels be customised for my project?
Yes. Big River offers factory cut-to-size services and can re-engineer panels to meet specific project requirements.
How does the fibre cement backing improve performance?
The 4.5mm fibre cement sheet prevents timber fibre breakdown, protects drainage ports, and reduces concrete staining, extending the life and performance of the panel.
Are InfillPlus® panels suitable for bridge decking?
Absolutely. InfillPlus® is commonly used in bridge decking applications due to its strength, stability, and safe work surface
More Bridge Products Products
Smarter Permanent Formwork
About AFS Rediwall® AFS Rediwall® Sizes Benefits of AFS Rediwall® AFS Rediwall® is a versatile Permanent Formwork...
Concrete formwork and accessories
Scaffold Plank
Big River Group’s Scaffold Plank is recognised for its safe and dependable performance.
Scaffold planking
Reinforcing Products
Reinforcing Mesh and Trench Mesh Steel reinforcing mesh is stocked in square ribbed mesh sheets 6m long x 2.4m wide.
Concrete reinforcement
PVC Wall System
Big River is the premier Australian distributor for PVC Wall Systems – an exciting new product for builders, architects...
Concrete formwork
Tell Us What You're Planning
Get pricing, availability, and expert advice on products for your project.
You'll be redirected to our quote request form.
Visit Your Local Big River Location
Find specialist building products and expert advice at your nearest Big River Location.