April 12, 2026 Load Classes for Steel Access Covers (FACTA Guide for UK Civil Engineers)

Not all access covers are designed to carry the same load. Some are suitable only for pedestrian environments, while others must perform reliably in roads, industrial yards or heavy-duty service areas. Selecting the wrong access cover load class can lead to premature failure, safety risks and costly replacement works. 

For fabricated steel access covers in the UK, the predominant specification is the FACTA Specification. FACTA has been developed specifically for fabricated steel products and takes full account of the elastic behaviour of steel under load. This makes it the most appropriate standard for assessing steel access covers, with BS EN 124 referenced where relevant for load class terminology and compatibility. 

What Are Access Cover Load Classes? 

Access cover load classes define how much load a cover can safely withstand and where it should be installed. They help civil engineers and specifiers determine whether an access cover is suitable for pedestrian areas, car parks, carriageways or heavy industrial applications. 

In UK practice, the recognised load classes are A15, B125, C250, D400, E600 and F900. While these classifications are widely understood, the method of testing fabricated steel covers against them is crucial. FACTA provides a steel-specific testing and performance framework that reflects the way steel deflects and recovers under load. 

FACTA vs BS EN 124 for Steel Access Covers 

BS EN 124 was originally written around the performance characteristics of cast iron covers and gratings. Cast iron behaves very differently from steel, particularly in how it responds to loading and permanent deformation. 

Fabricated steel access covers naturally deflect under load and return to shape when the load is removed. FACTA recognises this behaviour and applies appropriate performance and acceptance criteria for steel. As a result, FACTA is the predominant UK specification for fabricated steel access covers, ensuring fair, realistic and repeatable assessment of steel products. 

Understanding the Load Classes 

A15 – Suitable for pedestrian areas, landscaped zones and cycle tracks.
B125 – Designed for footways, private driveways and light car parks.
C250 – Used in kerbside areas and transitional zones where vehicles may pass intermittently.
D400 – Intended for carriageways and roads carrying all types of road traffic.
E600 – Suitable for industrial yards, loading bays and areas with high wheel loads.
F900 – Used in extreme load environments such as airports, docks and freight terminals. 

FACTA-compliant steel access covers are assessed so they meet the intent of these load classes without penalising steel for behaving as steel should. 

How to Choose the Correct Load Class 

The correct load class should be selected based on how the area will be used over the full life of the installation. Future loading, including delivery vehicles and maintenance access, should always be considered. 

Under-specifying an access cover can lead to movement, cracking, loss of bedding support and early structural failure. Over-specifying can increase costs, complicate installation and make inspection and maintenance more difficult. 

The right specification balances safety, durability, ease of use and whole-life cost. 

Risks of Incorrect Load Class Selection 

An under-rated access cover may fail gradually, starting with small movements or cracking before progressing to full failure. This can create hazards for vehicles and pedestrians and compromise the surrounding infrastructure. 

Over-rated covers can introduce unnecessary cost and handling challenges. Correct specification at design stage avoids both problems and ensures long-term performance. 

FACTA-Compliant Steel Access Covers from Fabweld Steel Products 

Fabweld Steel Products manufactures FACTA-compliant fabricated steel access covers across the full range of recognised load classes. All products are designed and manufactured in the UK using galvanised steel to BS EN ISO 1461 for long-term corrosion protection. 

Standard products can be adapted or manufactured to order to meet specific project requirements. Technical support is available to help engineers and specifiers select the correct load class and configuration for each application. 

Summary 

Understanding access cover load classes is essential for safe and durable infrastructure design. For fabricated steel access covers in the UK, FACTA provides the most appropriate specification by reflecting the true structural behaviour of steel. 

Fabweld Steel Products supplies FACTA-compliant steel access covers that give engineers confidence from specification through to installation. Technical advice is available to ensure the correct solution is selected first time.