--- title: "RSJ Steel Beam Installation Guide for Homeowners | Masters Group Brighton" description: "Complete guide to RSJ and steel beam installation for Brighton homeowners. Learn about structural surveys, building regulations, costs, and what to expect during installation." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "BlogPosting", "headline": "RSJ Steel Beam Installation: What Homeowners Need to Know", "description": "Everything you need to know about RSJ and steel beam installations for Brighton homeowners.", "datePublished": "2025-02-18", "dateModified": "2025-02-18", "author": { "@type": "Organization", "name": "Masters Group" }, "publisher": { "@type": "Organization", "name": "Masters Group", "url": "https://mastersgroup.uk", "logo": { "@type": "ImageObject", "url": "https://mastersgroup.uk/images/hero-bg.jpg" } }, "mainEntityOfPage": "https://mastersgroup.uk/blog/rsj-steel-beam-installation-guide", "image": "/assets/new-build-31-BgweBnE0.webp" }, { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "Do I need building regulations approval for an RSJ?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. Any structural alteration involving load-bearing walls requires building regulations approval and a structural engineer's calculations." } }, { "@type": "Question", "name": "How long does RSJ installation take?", "acceptedAnswer": { "@type": "Answer", "text": "A typical residential RSJ installation takes 2-5 days depending on the complexity and whether temporary support structures are needed." } }, { "@type": "Question", "name": "How much does RSJ installation cost in Brighton?", "acceptedAnswer": { "@type": "Answer", "text": "Typical costs range from £1,500 to £4,500+ depending on beam size, access, and complexity." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://mastersgroup.uk/" }, { "@type": "ListItem", "position": 2, "name": "Blog", "item": "https://mastersgroup.uk/blog" }, { "@type": "ListItem", "position": 3, "name": "RSJ Installation Guide" } ] } ] --- 17 Colebrook Road, Brighton, BN1 5JH info@mastersgroup.uk [![Masters Group](/assets/masters-logo-Dn445ZsE.png) MASTERS GROUP ](/) [Home](/)[About](/about) Services Areas [Our Work](/our-work)[Warranty](/warranty)[Reviews](/reviews)[Blog](/blog)[Contact](/contact) [01273 110607](tel:01273110607)[Get Estimate](/contact) ![RSJ steel beam installation in a Brighton property — structural steel work by Masters Group](/assets/new-build-31-BgweBnE0.webp) - [Home](/) - [Blog](/blog) - RSJ Installation Guide Steel Beams # RSJ Steel Beam Installation: What Homeowners Need to Know Published 18 February 2025 · 7 min read Removing a load-bearing wall to create an open-plan living space is one of the most popular home improvements in Brighton. At the heart of every successful wall removal is a correctly specified and installed [RSJ (Rolled Steel Joist) or steel beam](/services/rsj-steel-beam). Here's what every homeowner needs to know before starting. ## What Is an RSJ? An RSJ is an I-shaped steel beam used to support the loads above a removed wall. The term "RSJ" is often used interchangeably with "steel beam" or "universal beam" (UB). These structural elements redistribute weight from floors, walls, and roofs above to the supporting structure on either side. ## When Do You Need an RSJ? You'll need an RSJ when removing a load-bearing wall—one that supports structural weight from above. Common scenarios include creating open-plan [kitchen diners](/services/kitchen-diners), widening doorways, or forming larger openings for bi-fold doors during [garage conversions](/services/garage-conversions). Learn how this can add value to your property in our guide on [kitchen diner extensions](/blog/kitchen-diner-extension-add-value). ## The Installation Process ### 1\. Structural Survey A qualified structural engineer assesses the wall, calculates the loads, and specifies the correct beam size. This calculation is a legal requirement for building regulations approval. At Masters Group, we work with experienced structural engineers who understand Brighton's building stock. ### 2\. Building Regulations Application Before any work begins, building control must approve the structural calculations. In Brighton & Hove, this can be done through the local authority or an approved inspector. We handle this process as part of our [RSJ installation service](/services/rsj-steel-beam). See our [planning permission guide](/blog/planning-permission-guide-east-sussex) for more on regulations. ### 3\. Temporary Support Before removing the wall, temporary props (Acrow props) are installed to support the structure above. This critical stage requires careful positioning and adequate load distribution—getting it wrong can cause cracking or structural damage. ### 4\. Wall Removal and Beam Installation The wall is carefully removed, padstones are positioned, and the beam is lifted into place. In Brighton's Victorian and Edwardian terraces, this often requires precise manoeuvring through tight spaces, which is where experience matters. ### 5\. Making Good Once the beam is secured, the temporary supports are removed, and [plastering](/services/rendering-plastering) and finishing work restores the area to a clean, seamless finish. ## How Much Does RSJ Installation Cost in Brighton? Typical costs range from £1,500 to £4,500+ depending on beam size, access, and complexity. Larger openings or multi-storey load transfers cost more. We provide detailed quotes covering all aspects including structural engineering fees. For broader cost context, see our [Brighton construction costs guide](/blog/how-much-does-a-new-build-cost-in-brighton). ## Frequently Asked Questions ### Do I need building regulations approval for an RSJ? Yes. Any structural alteration involving load-bearing walls requires building regulations approval and a structural engineer's calculations. We manage this process on your behalf. ### How long does RSJ installation take? A typical residential RSJ installation takes 2–5 days depending on complexity and whether temporary support structures are needed. ### Need a Steel Beam Installed? Our structural steel specialists handle everything from engineering calculations to building control sign-off. 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