Prof. Dr.-Ing. Albert Hoch
Public certified and sworn expert of the Chamber of Industry and Commerce for Middle Franconia in Nuremberg
Inspection engineer of the Federal Railway Authority (EBA) for the structural integrity of pipes and manholes


8th September 2015 – Constitutive meeting of the AG 14

After many inquiries about the structural calculations for rehabilitation of pressure pipes by lining and hose lining, Prof. Dr. Albert Hoch and Prof. Hölterhoff seized the Initiative to establish a working group AG.

8th September 2015 – Establishing of a new working group AG (GSTT AK 3, AG 14) »Static of liners for the pressure pipes«

Mr. Markus Maletz (TÜV Rheinland Industrie Service GmbH) was chosen to lead the working group at the constitutive meeting of the new GSTT AG 14 (of the AK 3) »Static of liners for the pressure pipes« (working title) for drinking water and sewer pressure pipes in Berlin. The GSTT information 20-2 »Static of liners for the pressure pipes« must be prepared by the working group.

Dr. Wolfgang Berger (IAB – Institute for applied construction science, Weimar) was chosen to lead the working group AG 11 (of the AK 3) »Rehabilitation of the pressure pipelines« which was activated again at the constitutive meeting. The GSTT Information »Rehabilitation of the pressure pipelines« should be revised by the working group AG 20-1. Close and intensive collaboration between the two working groups was agreed upon.

Structural calculation of drainage systems

A working group » Structural calculation of drainage systems - manholes, DWA AG ES 5.9« was created on 4th December 2014 on the initiative of Prof. Dr. Albert Hoch. The group has already met twice, widely attended by experts in the area. Software EasySchacht98 from IngSoft company has already been for many years on the market and must be verified and evaluated and after adjustments with the committee members of the ES 5.9 documented in the standard. This way the processing time of the manhole standard will be estimated to one to two years.