FAB VENT™ is a cover specifically created for the power and transmission industry to span troughs containing HV power cables. The covers have a louvered steel plate design which allows for natural ventilation of the troughs and at the same time blocking direct sunlight onto the cables. National Grid commissioned Southampton University to carry out thermal analysis on the FAB VENT™ against similar designs in the industry. The report was conclusive that the unique FAB VENT™ airflow design performed the best in high temperature situations ensuring HV cables lose minimal power and as a result were used across the London Power Tunnel project. Another advantage is the covers can be designed for large spans and heavy wheel loads, with the option of 250 kN and 400 kN ultimate load capacities. Our technical team are available to discuss a design to suit your trench configuration.