Walls do more than divide spaces or provide privacy — they can form critical barriers that help contain fire and smoke, protect escape routes and separate different areas within a building. As such, a well-designed fire-rated wall system is important when constructing commercial buildings meant for higher occupancy, especially here in Western Australia, where buildings may need to account for bushfire-prone environments.
For architects and contractors, selecting the right fire-rated wall system for commercial buildings means looking beyond the individual materials used to construct a wall. Building fire-safe spaces means looking at the way those materials are combined and installed, ensuring they are tested against stricter regulations. To help you plan your build ahead, we explore the common approaches, design considerations, and everything you need to know when constructing commercial buildings.
What Is a Fire-Rated Wall System?
A fire-rated wall system is a wall assembly that has been tested or assessed to provide a specified level of resistance to fire. Rather than looking at an individual panel or lining in isolation, the fire performance applies to the complete system, including components such as framing, panels, insulation, fixings, joints and penetrations.
Fire resistance is commonly expressed as a Fire Resistance Level (FRL), which considers structural adequacy, integrity and insulation. The required FRL will depend on factors such as the building classification, wall location, and role within the building.
Where Are Fire-Rated Walls Used in Commercial Buildings?
Fire-rated walls can be required in a wide range of commercial applications, including:
- Intertenancy, separation, and boundary walls: used to divide commercial spaces and help prevent fire spread between tenants.
- Corridors, stairwells, shafts and risers: to protect key escape routes and vertical service spaces.
- Plant rooms and car parks: to contain higher-risk or external fire exposure areas.
They can also form part of fire compartments designed to limit the movement of fire between different areas of a building.
Common Types of Fire-Rated Commercial Wall Systems
Commercial projects can use several different approaches to achieve required fire performance, with each offering different installation and performance characteristics.
Masonry and Concrete Walls
Masonry and concrete have traditionally been used where high levels of fire resistance and mass are required. Their inherent properties can provide robust fire performance, but these systems can also be heavy and may require additional structural support. Masonry construction is also a wet trade, which can affect construction sequencing, site access and clean-up.
Framed Wall Systems
Framed systems typically combine steel or timber framing with plasterboard or other fire-rated linings. Different configurations can achieve varying levels of fire and acoustic performance, but the complete assembly must be installed according to the relevant tested system. Framing, board layers, insulation, fixings and joints can all contribute to the final performance.
Lightweight Modular Wall Panels
Lightweight panel systems provide another option for commercial construction, particularly where installation speed, handling and site access are important. These systems can combine fire and acoustic performance within a purpose-designed wall assembly while reducing some of the weight and installation requirements associated with traditional construction.
What to Consider When Choosing a Fire-Rated Wall System
Fire performance is only one consideration when selecting commercial building materials. The wall system should also suit the building’s acoustic, structural, installation and environmental requirements.
Required Fire Resistance Level
The required FRL should be established during the design process based on the building’s classification and the location and function of the wall. Builders should construct a complete tested or assessed system that provides the required performance rather than selecting individual components based only on their product-level specifications.
Acoustic Performance
Apart from fire, commercial walls often also need to manage soundproofing and sound absorption. Offices, schools, healthcare facilities, cinemas, and intertenancy applications can all have acoustic requirements, making it useful to consider systems that can provide both fire protection and acoustic performance. The final acoustic result depends on the complete wall assembly and its installation.
Wall Height, Span and Structural Requirements
Wall dimensions and site conditions can significantly influence the appropriate system. High-rise shafts, large industrial spaces, stairwells and other tall or difficult-to-access areas may benefit from wall systems designed for particular heights, spans or installation configurations.
Installation and Site Access
Construction programmes, labour availability and restricted work areas can all influence material selection. Lightweight panels and systems that reduce the need for scaffolding or wet trades may help simplify installation, reduce site congestion and allow other trades to access the area sooner.
Geographical Considerations
WA projects can face intense summer heat, coastal exposure and bushfire risk depending on location. For buildings in bushfire-prone areas, additional requirements may apply to the building’s construction and external elements. Fire-rated internal walls and bushfire-resistant construction are not necessarily the same requirement, so the appropriate provisions should be confirmed for each project.
Building Compliant, Fire-Safe Structures
The National Construction Code (NCC) sets out the minimum fire safety requirements for commercial buildings in Australia, with provisions that vary depending on building classification, construction type and design. These requirements should be addressed early in the design and specification process to ensure compliance.
It is also important to understand that a wall is only considered fire rated when the complete system has been tested or assessed as an assembly in accordance with the relevant standards. This includes all components such as joints, penetrations, services, fixings and installation methods, as these can all influence the system’s certified fire performance.
In addition to NCC requirements, projects located in bushfire-prone areas in WA may be subject to further construction obligations depending on the site’s Bushfire Attack Level (BAL). As you plan your project, consult AS 3959:2018 alongside NCC provisions to ensure the selected wall system is appropriate for its intended application and level of exposure.
Fire Performance Without the Weight of Traditional Construction
For commercial projects requiring an alternative to traditional wall construction, Speedpanel wall systems offer a purpose-designed solution for fire and acoustic applications. Combining a steel outer shell with a lightweight aerated concrete core, Speedpanel walls are 100% recyclable, making them an efficient and sustainable material choice for commercial buildings.
Excellent Fire Resistance
Speedpanel has undergone extensive fire testing and certification for a range of applications. Certain 78mm Speedpanel systems can achieve FRLs of up to -/240/240, subject to the specific certified system and application. This makes Speedpanel suitable for applications including shafts, stair walls, intertenancy walls, plant rooms and commercial separation walls.
Faster Installation
The lightweight composition and tongue-and-groove connection allow Speedpanel panels to be handled and installed efficiently. The system can also reduce reliance on wet trades, while certain applications can be constructed without scaffolding. These characteristics can be particularly valuable on high-rise and commercial projects where construction sequencing and site access are important.
All-in-One System
Speedpanel is designed for applications where both fire and acoustic performance are required. Its systems are used for intertenancy and corridor walls, cinema walls, and other commercial applications where controlling fire and sound transmission is important. Performance depends on the complete specified and tested wall system.
Designed for Challenging Applications
Speedpanel can be used across a broad range of commercial and industrial applications, including shafts and risers, stair walls, car parks, plant rooms, ceilings and bulkheads, external and facade substrates, warehouses and cinemas. Its lightweight panels and installation flexibility can be particularly useful in confined or difficult-to-access areas.
Comparing Commercial Fire-Rated Wall Systems
| Wall System | Fire Performance | Installation | Weight | Acoustic Performance |
| Masonry / concrete | High, depending on construction | Labour-intensive, wet trade | Heavy | Strong due to mass |
| Framed plasterboard | Depends on tested system | Multiple components and layers | Lightweight | Can be configured for high performance |
| Speedpanel | Certified fire-rated systems available | Lightweight, tongue-and-groove installation | Lightweight | Designed for fire and acoustic applications |
Source Fire-Rated Wall Systems from a Trusted Commercial Building Material Supplier
Choosing the right fire-rated wall system is an important part of commercial construction, and the product should be selected with the complete building design in mind. From fire and acoustic performance to installation requirements and WA site conditions, every factor can influence the final specification.
Need help finding the right materials for a fire-rated wall system? Westgyp supplies Speedpanel and other commercial building materials for construction projects across Perth and WA. Backed by years of hands-on experience, our team can help builders, contractors and project teams identify suitable wall system solutions and arrange reliable supply and delivery to keep commercial projects moving. Contact us or visit our Balcatta showroom to find the right commercial building materials for your project.