GPR finite difference time domain modelling
Sandberg are pleased to announce that an article titled: “Finite difference time domain modelling as support to ground penetrating radar surveys of precast concrete units”, written by…
Verification of construction detail
It is often necessary to verify construction detail of structures. This could be to ensure compliance with current legislation and standards, proposed modifications or change of use,…
Ensuring a successful GPR survey
It concerns me that there is so much confusion and misinformation about GPR. Some equipment manufacturers would have you believe that GPR is straightforward. All you need…
Chimney flue surveys – looking back
Sandberg was one of the first to start using Ground Penetrating Radar (GPR) for chimney flue location. I would go as far as to say that Sandberg…
Pile cap location survey
The purpose of the survey was to determine the general slab construction details of a warehouse floor slab. In particular, confirmation was required if pile caps or…
Rebar location
Don't take chances. Locate rebar in concrete before you find it with your drill bit, core barrel or saw! You should always check any concrete for rebar…
Embedded steel in historic buildings
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…
Filler joist location
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.…
Floor slab survey for load capacity
We were recently instructed to undertake a structural floor slab survey for back analysis of the slab to determine its load capacity. The following information was required…
Chimney flue location in thick stone walls
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…
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