Tunnel designers and contractors can rely on Jordahl anchor channels and T-bolts for the safe support of catenary cables, power cables, signalling equipment, illumination equipment and ventilation equipment, to concrete tunnel structures. Allowing fast and secure installation without drilling, the Jordahl system uses corrosion-resistant materials, and provides adjustable connections that are reliable and resistant to fatigue, seismic vibrations and explosions. The system meets all relevant safety requirements, and will perform consistently for many years after the tunnel is completed. The safety and quality of cast-in Jordahl anchor channels has been proven internationally and has set high standards for connection systems. The anchor channels are available in numerous designs, custom solutions can be designed specifically to a project.