Kit contains items needed for seismic bracing long cable tray runs. Why is seismic bracing important? International Building Code. Cablofil Wiremesh Cable Tray concept based upon performance, safety and economy; three qualities which make Cablofil Wiremesh Cable Tray system preferred by installers. Cablofil adapts to the most complex configurations, and its structure gives maximum strength for minimum weight. The ease of. ntractors, Specifiers, and others. We have decades of experience with real-world applications in severe seismic zones, supplying orld-class products and solutions. Our strong legacy includes OSHPD OPA and OPM approvals, Structural Engineer approvals, and compliance with Internation-al Building. This article will explore the importance of seismic resistance in cable trays, discuss when seismic braces are necessary, and help you understand how to make informed decisions for your installation. Seismic Category II cable trays and their supports are also designed utilizing the design criteria of this appendix. 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.