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.

 

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.

 

Frequently Asked Questions – Infill Panels

1. 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.

2. 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.

3. 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.

4. 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.

5. 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.