An RSJ is the steel beam that carries the load once a wall is taken 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 Dunstable property involves, and who checks it.
Building control for an RSJ in Dunstable is run by Central Bedfordshire Council itself
Central Bedfordshire Council runs its own building control service, so the notice for your beam goes to the council rather than to a shared regional body. The service is reachable on building.control@centralbedfordshire.gov.uk and on 0300 300 8635. We make the application and deal with the surveyor, so you are not chasing a reference number while the props are in.
Inspections have to be booked ahead. Central Bedfordshire asks for contact no later than 3:30pm, two days before an inspection is required. That two day lead time sits inside our programme rather than beside it. We book around the propping, the bearings and the beam going in, so each stage is seen at the right point instead of after it is covered up.
The bedrock is not the same chalk across Dunstable
British Geological Survey 1:50,000 mapping gives the Holywell Nodular Chalk Formation beneath the Dunstable crossroads and the Priory Church. The BGS describes that formation as generally hard nodular chalks with thin flaser marls and significant proportions of shell debris in part. At the northern edge of the town, around Brewers Hill Road, the same mapping gives the Zig Zag Chalk Formation, which belongs to the Grey Chalk Subgroup.
That matters where a beam lands. A steel 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 the engineer calls for a new pier or a pad foundation, what sits beneath it is a question to settle before the steel is ordered. We open up, record what is there and pass it to the engineer.
Part of residential Dunstable stands on former chalk workings
The BGS 1:50,000 map records Worked Ground at Royce Close, the housing estate built on the former California Chalk Pit. That pit off Whipsnade Road became the California swimming pool in 1935, then the California Ballroom, and is now the Royce Close estate. The same map records none at Spoondell, so backfill there would only show up in a site investigation.
Superficial cover varies as well. The BGS maps no superficial deposits over the crossroads or the Priory, but maps Head, described as sand, gravel, clay and silt, in the south of the town. Made ground and Head both change what a padstone is spreading its load into. We record what the openings show and let the engineer design the bearing from that, not from an assumption that chalk means good ground.
In the Dunstable East area, 1,890 of 2,688 households live in a semi detached house
That is just over 70 per cent, on 2021 Census figures. Valuation Office Agency council tax records also put about 42 per cent of Dunstable's dwellings in the 1945 to 1972 build periods, against about 26 per cent across England and Wales. Those are houses with a party wall, cavity inner leaves and shallow foundations.
Two points follow for a beam. A party wall means your neighbour's structure is part of the calculation and part of the notice. A shallow foundation under a bearing point may need a pad or underpinning, which the engineer decides once the ground is open. We price the beam and the bearings together, so the figure does not move halfway through.
- Load-bearing wall removal and knock-throughs
- Bearing checks into party walls and shared masonry
- Temporary propping and staged, controlled demolition
- Party Wall Act 1996 notices and awards handled
- Existing pipework and cabling diverted around the new opening
The GS Renovation Difference in Dunstable
We are a contractor, not an engineering practice. For a Dunstable beam we appoint the structural engineer, build to the calculations issued, and hold the propping until the steel is in and bearing correctly. The building control application goes to Central Bedfordshire Council's own service, and we make it and book the inspections around our programme. That gives you 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 rated 4.9 from 31 reviews on MyBuilder. Quotations are free and carry no obligation.
- Free, no-obligation quotations
- Building control applications and inspections coordinated for you
- Beams boxed and fire protected to the approved detail
- Aftercare and snagging support once the job is finished
- Party Wall Act notices served where a beam bears into a shared wall
- Straight advice on what is and is not worth spending money on