Cable trays are classified in accordance with EN 61537. The height of the vertical side walls is #15, #35, #60, #85 #110 mm. (combinations of width, type and height can be verified in the. Cable trays are # non-perforated, # perforated, and manufactured from steel sheet. The mechanical and electrical characteristics, tests, certifications, overall quality management, recommendations mentioned. Trayco is specialised in producing and optimising 100% Belgian cable trays, mesh trays, cable ladders, mounting and floor systems. We also play an important role as advisor and guide during the installation process. All Vergokan products are CE marked.