Steel beam installation, RSJ and structural alterations in Berkhamsted. Trusted, professional, 30+ years' hands-on experience.
An RSJ is the steel beam that takes the load when a wall comes out. Our part is the survey, the propping, the beam, the padstones, the making good and the inspections that sign the work off. We appoint a structural engineer for the calculations and build to what they issue. We never write those calculations ourselves. This page sets out what an RSJ job on a Berkhamsted property involves, and who checks it.

Dacorum Borough Council does not run its own building control service, and states that its building control services are provided by Hertfordshire Building Control. Hertfordshire Building Control was created in 2016 to provide building control services for several local authority districts in Hertfordshire. Dacorum is its eighth member. The notice for your beam therefore does not go to the council offices.
Applications for Berkhamsted go to Hertfordshire Building Control at 4th Floor, Campus West, Welwyn Garden City, Hertfordshire AL8 6BX, telephone 01438 879990, or through the Planning Portal. We make that application and book the inspections around the steel going in, so the propping, the bearings and the beam are each seen at the right stage rather than after the fact.
British Geological Survey 1:50,000 mapping gives New Pit Chalk Formation as the bedrock beneath the central High Street, Chapel Street, Bridge Street, Kings Road, Chesham Road, Bridgewater Road and Berkhamsted Castle. Over the valley floor at the central High Street, and at the canal by Castle Street bridge, the same mapping shows Head, described as clay, silt, sand and gravel, as the superficial deposit.
That matters where a beam lands. A steel beam concentrates the load of everything above it onto two small bearing points, and those points have to carry down to something able to take them. Where your engineer calls for a new pier or a pad foundation, what sits beneath it is a question to answer before the steel is ordered. We open up, record what is there and pass it on.
A steel beam arrives on a lorry and is carried in by hand, so access is part of the price rather than an afterthought. Dacorum's design guidance for Berkhamsted states that off street parking is not characteristic of many of the 19th century residential streets. The Berkhamsted Conservation Area Character Appraisal records that the High Street is roughly level along its length, while the side streets leading southwards from it rise steeply. It gives Highfield Road through to Kitsbury Road as the example.
The appraisal also records that Highfield Road and Victoria Road were built during the mid to late 19th century with small terraced houses similar to those on Bridge Street and Chapel Street. A small terrace, a steep street and no off street parking change the method rather than the outcome. We agree the delivery point, the carry route and the propping sequence with you before the order goes in.
We are a contractor, not an engineering practice. For a Berkhamsted beam we appoint the structural engineer, build to the calculations they issue, and hold the propping until the steel is in and bearing correctly. The building control application goes to Hertfordshire Building Control rather than to the council, and we make it and book the inspections around our own programme. That means one point of contact for the engineer, the steel, the brickwork and the sign off. GS Renovation Ltd is fully insured, registered in England, company number 14611254, and quotations are free and without obligation.
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FAQ
Expect the figure to track scope rather than postcode. The RSJ and steel beam installation elements that move a quotation are span, access and condition, all of which we check at the HP4 property before writing anything down. GS Renovation then itemises labour, materials and the Dacorum Borough Council element for your Berkhamsted home. Comparing that against another Berkhamsted builder is straightforward because every line is visible. Ring 07472 424 226 and we will arrange a free survey at the HP4 property in Berkhamsted. As a rough guide, RSJ and steel beam installation in London runs roughly £1,500 to £4,000 for the beam itself on a single straightforward opening, covering supply, installation and building control sign-off; a full knock-through including taking the wall out, the structural engineer's fee and making good more typically comes to £2,500 to £6,500 or more (indicative London ranges, MyBuilder and Checkatrade, 2026). Your figure depends on the size, specification and condition of the property, which is why we survey before quoting.
It can, because the bedrock is not the same across the town. British Geological Survey 1:50,000 mapping gives Chalk Rock Member at the top of Kitsbury Road, and Lewes Nodular Chalk Formation under Charles Street, Gossoms End and Swing Gate Lane. On the higher ground at Gossoms End and Swing Gate Lane the superficial deposit is Clay-with-flints. The structural engineer we appoint designs each bearing from a trial hole at the actual bearing point.
That depends on the rear access, and on these streets there can be one. The character appraisal records that Hamilton Road, on the north side of Kitsbury Road, has small scale garaging and workshops servicing the rears of the Charles Street properties. Dacorum's design guidance records off street parking as not characteristic of the 19th century residential streets. We measure both routes at survey, including the turn at the doorway and the ceiling height inside.
Not on its own. The span is one input to the calculation and the load above is the other. The character appraisal records that the terraces developed after 1851 on Bridge Street, Manor Street, Chapel Street and Holliday Street were built of brick to a two up two down floor plan. Brickwork above an opening, plus a floor and a roof, can put a heavy load on a short span. The engineer sizes the section.
Only if it is matched deliberately. The character appraisal covers George Street, Ellesmere Road, Station Road and the streets between them as its canal, river and railway area. It records the predominant building material there as the grey and buff brick used in the first three quarters of the 19th century. A modern red stock reads as a patch against that. We agree the brick, the bond and the pointing before the opening is formed.
No, even though they were built together. The Berkhamsted Conservation Area Character Appraisal records Highfield Road and Victoria Road as mid to late 19th century terraces, similar to those on Bridge Street and Chapel Street. That similarity is a guide to what is likely, not to what is actually there. Later extensions, altered roofs and earlier openings all change what a wall carries. The engineer designs for the individual house rather than for the street.
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