When planning a renovation or extension that involves removing walls or adding new spans, many homeowners worry about one practical detail: how do steel beams actually get delivered and installed on site? Steel sections like RSJs, UBs, and UCs are large, heavy, and essential to the structure, so careful handling is key. Here’s what to expect in the UK when it comes to delivery and installation on domestic building projects.
Ordering and Delivery of Steel Beams
Once your structural engineer has calculated the correct size and type of beam, it is ordered from a local steel supplier or fabricator.
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Lead times: Standard beams are often available quickly, but custom lengths, drilled holes, or welded plates may add a few days.
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Delivery vehicles: In the UK, suppliers typically deliver on flatbed lorries equipped with a crane (HIAB) if access allows. Where access is tight, beams may be delivered curbside, requiring manual handling or lifting equipment on site.
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Size and access considerations: Domestic beams for extensions or loft conversions usually range between 3–6 metres in length, but longer spans are possible. Site access is assessed in advance to ensure the beam can be delivered and manoeuvred safely.
Preparing the Site for Beam Installation
Before the beam arrives, builders will make sure:
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Temporary supports (such as Acrow props and strongboys) are in place to hold up walls or floors during installation.
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Bearing points (padstones or concrete spreaders) are prepared to receive the ends of the beam.
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Safe access routes are available for lifting and moving the steel into position.
This preparation is essential to avoid delays and ensure the beam can be installed efficiently once it’s on site.
Lifting and Positioning the Beam
Getting the steel beam into place is often the most challenging part of the process. Several methods are commonly used:
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Manual handling: For shorter, lighter beams (up to around 100–150kg), a team of builders may lift and manoeuvre the steel into place by hand.
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Hoists or Genie lifts: For heavier beams in domestic projects, portable mechanical lifts are used to raise the steel safely and accurately.
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Cranes: Where access allows, a mobile or HIAB crane can lift the beam directly into the property. This is common for large spans or restricted internal spaces.
Once in position, the beam is lowered onto its padstones or supports and secured according to the engineer’s design.
Securing and Integrating the Beam
After placement:
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Packing and levelling: The beam is adjusted to sit perfectly level, with any necessary packing plates.
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Bolting or welding: If multiple beams connect, steel plates, bolts, or welds are used to join them securely.
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Integration with timber: Joists or rafters may be hung from the beam using joist hangers, bolts, or cleats fixed to the steel.
The installation must match the engineer’s drawings precisely to ensure strength and compliance with UK Building Regulations.
Safety and Building Control
Safety is a major factor in steel beam installation:
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Beams must be supported correctly during installation to prevent collapse.
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Personal protective equipment (PPE) is required for handling and lifting.
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Building Control inspectors may visit to check the beam is installed correctly, bearing on suitable padstones, and in line with the approved design.
Final Thoughts
Steel beam delivery and installation on a domestic site is a well-practised process in the UK. From supplier delivery on HIAB-equipped lorries to careful positioning with hoists or cranes, experienced builders and structural engineers ensure the beam is fitted safely and correctly.
For homeowners, understanding the logistics helps demystify the process: beams are not simply “dropped in,” but carefully specified, delivered, and integrated into the structure. With the right planning and professional handling, installing steel beams is a smooth and secure part of the building journey.
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