You should always check any concrete for rebar and other embedded objects before cutting, drilling, sawing or other intrusive works. Whether it’s a concrete slab, beam column, wall, foundation, footing, retaining wall, pavement, etc; check first!
On Thursday 5 July 2018, Sandberg took part in the 42nd J.P. Morgan Corporate Challenge at Battersea Park, London.
The majority of chimney flue location surveys we undertake are in Victorian houses. These have uniformly built, not overly thick, brick walls, which makes detection and location of flues fairly straight forward. In this cottage, the old stone walls were up to 1m thick
GPR is very effective in detecting and location filler joists in concrete slabs. Unlike some other methods, GPR can differentiate between dense beam reinforcement and filler joists. We were asked to locate filler joist on this site in London and mark up their positions in-situ.
We were recently instructed to undertake a structural floor slab survey for back analysis of the slab to determine its load capacity. The objectives were to to map thickness, pile locations, and the general reinforcement layout.
Embedded steel has been used for strengthening structures for hundreds of years. In historic and heritage buildings, embedded steel is particularly common, most often in the form of a structural frame (I beams and columns) or to secure masonry blocks (steel dowels, pins and cramps).