Our challenge was to survey a listed historic water tower that had been badly damaged in a recent fire. The tower was covered in scaffolding and waterproof sheeting and we were only able to remove one side of sheeting for a single day. Our Faro Laser scanner was the only solution to pick up the required detail in such a small time period on what was a very difficult site.

We established site control and related it back to the site datum we had placed for a Topographical Survey carried out several years previously. Then we started to scan the tower both internally and externally using spherical reference targets to help stitch the scans together.

As the client had asked for plans at regular intervals up the tower, cross sections and detailed elevations highlighting new cracks caused by the fire, the only possible way of obtaining the necessary data was to scan a loop around the building at each level of scaffolding. Maintaining accuracy was key to verifying any lean the tower may have developed. This was done by keeping primary control outside the building so that each level could be positioned accurately relative to the others. After working our way up to the top, the water tank itself was visible as the roof had been completely destroyed.

We successfully captured all the data needed and produced high quality drawings which fulfilled the client’s requirements.

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