The landscape of UK construction has been reshaped by the introduction of the Building Safety Act 2022. For developers, contractors, and architects involved with higher-risk buildings (HRBs), this legislation introduces a more rigorous regulatory framework. Achieving compliance is not just a procedural step; it is a fundamental requirement that places a greater emphasis on accountable, expert-led design. At the heart of this new era of safety is structural engineering, the discipline responsible for ensuring the integrity and resilience of a building throughout its entire lifecycle.
As a leading Civil & Structural Engineering consultancy, we understand the complexities of the new regime. Our director-led service, rated ‘Excellent’ across 48 Google reviews, is designed to guide project teams through the specific challenges of HRB compliance. Get in touch with us today by calling 0151 374 0545 or emailing us at info@ajfengineering.co.uk to see how we can help.
Understanding Higher-Risk Buildings (HRBs)
The Building Safety Act defines higher-risk buildings primarily by height and use. A building is classified as an HRB if it is at least 18 metres tall or has a minimum of seven storeys, and contains two or more residential units. This definition also extends to care homes and hospitals meeting the same height threshold during the design and construction phase.
For those undertaking such projects, the legislation establishes clear gateways during the design and construction process, requiring evidence that safety is being managed proactively. This is where the role of a competent structural engineer becomes indispensable.
The Building Safety Act: Key Structural Engineering Requirements
The Act places significant legal responsibilities on dutyholders, including clients, principal designers, and principal contractors. For a structural engineer, this translates into specific obligations to ensure a building’s design is safe, compliant, and robust.
The Golden Thread of Information
A core concept of the Act is the “golden thread,” a digital record of a building’s data that is maintained from the design phase through to occupation and beyond. Structural engineers are key contributors to this thread. All structural calculations, design details, material specifications, and risk assessments must be meticulously documented and accessible. This ensures that future building owners have a complete and accurate understanding of the structure, which is vital for safe management.
Demonstrating Structural Robustness
Beyond standard design codes, the Act demands a greater focus on structural robustness. This involves designing a building to withstand unforeseen events without suffering disproportionate collapse. At AJF Engineering, our chartered engineers are adept at applying the disproportionate collapse rules in the UK, creating designs that provide an appropriate level of resilience. This may involve specific tying requirements, alternate load paths, and enhanced connection details to ensure the structure remains stable even if a local failure occurs.
Fire-Safe Structural Design
Fire safety is a primary concern for HRBs. A critical aspect of a structural engineer’s role is to ensure the structural frame can maintain its integrity for a sufficient period during a fire, allowing for safe evacuation and firefighting. This involves:
- Specifying appropriate fire protection: Ensuring steelwork has the correct intumescent coating or boarding.
- Designing for thermal effects: Accounting for how high temperatures affect the strength and stiffness of materials like steel and concrete.
- Ensuring compartmentation: Working with architects to ensure structural elements support fire-resistant walls and floors.
Achieving a fire-safe structural design requires a collaborative approach, integrating our expertise with that of fire engineers and architects from the project’s inception.
How AJF Engineering Delivers HRB Compliance
As a North West-based consultancy with a UK-wide reach, we offer a bespoke service that combines technical expertise with a practical, collaborative mindset. Our team of chartered engineers brings a wealth of experience to every project, ensuring your HRB scheme is not only compliant but also cost-effective and buildable.
Expertise in Action: Our Chartered Team
Our team is led by Chartered Civil and Structural Engineers, holding memberships with the Institution of Structural Engineers (IStructE) and the Institution of Civil Engineers (ICE). These certifications are more than just credentials; they represent a commitment to the highest professional standards and a deep understanding of complex engineering principles. This expertise is crucial when navigating the new dutyholder roles for engineers under the Building Safety Act. You can learn more about the experienced professionals who will guide your project on our team page.
Value Engineered Structural Schemes
Compliance does not have to mean excessive cost. We work closely with clients and architects to develop value-engineered structural schemes that meet all regulatory requirements without compromising the project’s commercial viability. By engaging early in the design process, we can advise on the most efficient structural forms, whether that’s a steel frame, reinforced concrete, or a hybrid solution. Our goal is to achieve a lean, robust design that minimises material usage and simplifies construction.
A Proven Track Record
Our ability to deliver on complex projects is demonstrated across our portfolio. From multi-storey residential blocks like Gildart Street in Liverpool to the sensitive refurbishment of heritage buildings, our experience spans a wide range of challenging schemes. We invite you to explore our projects to see how we have provided innovative solutions for developers and contractors.
Navigating the Gateway System with Confidence
The Building Safety Act introduces three gateway points that projects must pass through:
- Gateway One (Planning): Occurs at the planning application stage, requiring the submission of a fire safety statement.
- Gateway Two (Pre-construction): A “hard stop” where construction cannot begin until the Building Safety Regulator is satisfied with the full design. This requires detailed structural plans, calculations, and compliance declarations.
- Gateway Three (Completion): Before occupation, dutyholders must demonstrate the building was constructed in accordance with the approved plans.
Our director-led approach ensures you have senior-level expertise to navigate each of these gateways successfully. We provide the comprehensive documentation and clear evidence needed for building control approvals, helping to de-risk the process and keep your project on schedule.
Partner with an Expert in HRB Structural Compliance
The Building Safety Act represents a fundamental shift in the construction industry, demanding a higher standard of competence and accountability. For developers, contractors, and architects working on higher-risk buildings, partnering with the right engineering consultants is more critical than ever. AJF Engineering provides the expert, director-led service needed to navigate this new landscape with confidence.
We combine technical excellence with a focus on buildability and commercial awareness, ensuring your project meets its safety, budgetary, and programme goals.
Get in touch with us today by calling 0151 374 0545 or emailing us at info@ajfengineering.co.uk to discuss a project.
FAQs: Structural Engineering and the Building Safety Act
Why is a chartered structural engineer important for HRB projects?
A chartered engineer has been independently assessed and is recognised for their competence, experience, and commitment to professional standards. For HRBs, where safety and accountability are paramount, using a chartered structural engineer provides assurance to the Building Safety Regulator and other stakeholders that the design is in expert hands.
What is disproportionate collapse and why does it matter for HRBs?
Disproportionate collapse is when a localised failure, such as from an impact or explosion, triggers a catastrophic chain reaction, leading to the collapse of a large part of the building. The disproportionate collapse rules in the UK mandate that buildings are designed with sufficient robustness to prevent this. For HRBs, this is a critical aspect of structural design.
How does structural value engineering work with the Building Safety Act?
Structural value engineering for cost savings involves optimising a design without compromising safety or performance. In the context of the BSA, this means finding the most efficient way to meet the stringent requirements. This could involve smarter material choices, refined structural grids, or innovative design details that deliver the required robustness in a more economical manner.
Can you provide structural calculations for a small extension as well as a large HRB?
Yes. While this article focuses on HRBs, our expertise covers projects of all scales. From structural calculations for an extension to the comprehensive design of complex multi-storey frames, our chartered engineers apply the same level of rigour and professionalism to every scheme.
Get in touch with us today by calling 0151 374 0545 or emailing us at info@ajfengineering.co.uk to see how we can help.