By reinforcing the cable tray structure, it can effectively reduce the dynamic impact caused by earthquakes, ensuring that the cable tray structure and the cables it carries remain securely in place. Earthquakes and seismic events can cause severe damage to electrical infrastructure, including cable trays, leading to outages and even safety hazards. For over 60 years, the mechanical, electrical, and fire protection trades have relied on TOLCO seismic bracing solutions. us/cablofil for complete seismic catalog Earthquake Sway Brace Systems for Cable Trays Legrand/Cablofil has joined with Loos and Company, the industry's top manufacturer of Seismic Wire Rope/Cable™ Bracing, to provide a comprehensive and unique line of. pacing of the system supports and their restraints. Supports for these systems are typically sized to carry approximately a 10 ft length of conduit or duct (in the case of trapezes, ultiple pieces of conduit each approx 10 ft long). Seismic restraints, on the other hand, are normally spaced. Technical overview of seismic cable tray design considerations including bracing splice reinforcement movement accommodation cable retention and support verification.