Terrain Surveys were highly responsive in supplying the point cloud and 3D model. The model was crucial to our being able to design and have accurately fabricated the steel frame. The building was twisted in plan and section and the 3D model allowed us produce shop drawings, so that when the steel arrived it fitted to within 5mm across the building and side to side. As the building is on a London Red Route it was crucial that the new steel could be fitted first time without any site amendments.