Strength & Support: Using the I-Plus Aluminium Rails for Class A Substructures

Modern roof terraces, podium decks, and balconies require substructures that are not only strong and stable but also compliant with the most stringent fire safety standards. The I-Plus aluminium rail from Wallbarn has been engineered to deliver exceptional load-bearing performance, adaptability, and compliance, making it a key component in Class A-rated substructure systems.

Engineered for Long-Span Strength

The I-Plus aluminium rail has been designed with a unique cross-sectional profile that maximises strength while keeping weight to a minimum. This ensures long-span support for decking and paving projects, reducing the number of pedestals required and delivering a more efficient installation process.

By working alongside MetalPad EX pedestals, the system achieves exceptional load-bearing capacity, supporting heavy-duty paving slabs, tiles, or decking boards. This strength is essential for podium decks, commercial terraces, and high-rise balconies where durability cannot be compromised.

Designed for Fire Safety

Fire safety is a non-negotiable requirement for external constructions in the UK. The I-Plus aluminium rail forms a central part of Wallbarn’s Class A fire-rated systems, ensuring projects meet EN 13501-1:2018 standards. By combining non-combustible aluminium rails with fully metal pedestals such as the Class A1 substructure system, contractors and designers can achieve complete compliance.

This makes the I-Plus rail particularly suitable for high-rise residential developments, public realm projects, and any build where legislation demands Class A-rated solutions.

Compatible with Multiple Build-Ups

One of the biggest advantages of the I-Plus aluminium rail is its adaptability. It integrates seamlessly with a wide range of Wallbarn systems, including the fire-rated paving system and the Permeate planter system.

This flexibility allows specifiers to design outdoor spaces that include a mix of paving, decking, planters, and seating areas, all supported by a consistent, compliant substructure.

Precision and Stability in Installation

The I-Plus aluminium rail provides exceptional accuracy during installation. Its stable profile ensures precise alignment of decking or paving, helping to achieve clean lines and consistent finishes across large areas. This precision is particularly valuable in urban developments where aesthetics are just as important as structural reliability.

Wallbarn’s substructure solutions are known for their ability to reduce installation time while delivering long-lasting results, and the I-Plus rail is a key part of that process.

Benefits of the I-Plus Aluminium Rail

• Lightweight yet extremely strong cross-sectional profile

• Designed for long-span applications, reducing pedestal numbers

• Fully non-combustible and Class A-rated when combined with fire-rated pedestals

• Compatible with multiple Wallbarn systems including paving and decking solutions

• Provides precision and stability for clean, consistent finishes

• Suitable for commercial and residential developments alike

Typical Applications

The I-Plus aluminium rail is versatile enough to be used across a wide range of projects, including:

• Roof terraces on residential and commercial buildings

• Balconies in high-rise developments

• Podium decks in regeneration schemes

• Public realm spaces requiring heavy-duty performance and fire compliance

For complex designs incorporating greenery and seating, it integrates perfectly with systems such as the Permeate planter system, enabling multifunctional outdoor environments.

Meeting Modern Construction Challenges

As legislation becomes stricter, particularly regarding fire safety and sustainability, the demand for reliable, compliant substructures has grown. The I-Plus aluminium rail addresses these challenges by combining high-performance engineering with full compliance to Class A fire standards.

Together with Wallbarn’s fire-rated pedestal systems and Class A1 substructure options, it provides a trusted foundation for projects of all scales.

Long-Term Durability

Unlike timber or composite supports, aluminium does not rot, warp, or degrade over time. This guarantees a substructure that remains strong and reliable throughout the life of the building. Combined with Wallbarn’s pedestal technology, it offers an unrivalled solution for long-lasting installations in exposed outdoor conditions.

Conclusion

For specifiers, contractors, and architects looking for a substructure component that delivers strength, fire safety, and design flexibility, the I-Plus aluminium rail is an essential choice. Its long-span capabilities, precision installation, and seamless integration with other Wallbarn systems make it a cornerstone of modern construction.

By combining this rail with MetalPad EX, fire-rated paving systems, and Permeate, Wallbarn provides contractors with a complete, compliant, and future-proof solution for decking and paving substructures.