… From 1982 until 1994 Prof. Weißenbach held the chair of ground and soil engineering at the TU Dortmund. From 1965 until 2006 he chaired the working group 2.4 "Construction Pits" of the German Geotechnical Society.
Prof. Hettler has succeded him in both posts. He is also member in several standardization committees including as chairman of DIN 4085 "Soil - Calculating Earth Pressure". He is also authore of a book on high-rise foundations, the chapter on earth pressure in the Soil Engineering Handbook and co-author of the a book on construction experts in court.
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