GBG is a leading international company in the use of Non Destructive Evaluation (NDE) for the forensic investigation of structures. With over 30 years of experience and cutting edge survey tools including Ground Penetrating Radar (GPR), Infrared Thermography, Ultrasonics and Acoustic Methods, GBG provides information on structural arrangement and condition non invasively with a wide range of deliverables. GBG also specializes in Measured Building Survey (MBS), delivering 2D and 3D conventional as-built data, and Computer Aided Design (CAD), Building Information Models (BIM) and Finite Element (FE) models. GBG investigates a wide range of structures from historically important buildings to small private residences; all of which require expert appraisal and attention to detail when assessing their construction and condition. Projects include: Solomon. R. Guggenheim Museum NY, FLW’s Fallingwater PA, NY State Capitol Building NY, US Capitol Washington DC, Hearst Castle, CA the NYC School District, Rose Bowl Pasadena and various buildings at Yale University CT and Princeton University NJ.