Stog GmbH meets all the quality requirements of Deutsche Bahn AG. Here you will find some excerpts from the specifications:

• Manufacturer-related product qualification HPQ for expansion joints for transverse and longitudinal joints as per GL 804.5201
• Manufacturer-related product qualification HPQ for compensating plates and supporting cross beams as per DBS 918 005 EXC 3DB
• DIN EN ISO 9001:2015 “Quality management systems”
• Certificate 2374-CPR-1668 Metall-Zert