The International Electrotechnical Commission (IEC) provides detailed guidelines for cable tray systems under IEC 61537. This standard outlines the construction requirements, testing methods, and performance parameters for cable trays and related support systems. For proper installation, design, and maintenance, adherence to international standards is essential. The Cable Tray ng standards, performance standards, test standards and application in this document have been tested extens ompetent professional en completely installed, without damage either to conductors or. Riyadh Airports is now managing and operating King Khalid International Airport (KKIA) in the Saudi capital. Expansion at KKIA facilities will include operating terminal 6, which could be the largest in the Middle East. Riyadh Airports is (75 km south of Riyadh) and in Sudair city (120 km north of. TSUBAKI KABELSCHLEPP develops customized solutions for cable carrier sys-tems in airport technology. Our decades of experience from hundreds of realized projects in various industries with diverse demands on our cable carrier systems, lead to new custom and application-specific solutions for our. Unitray Systems Inc. is an Edmonton based company dedicated to excellence in the manufacturing of electrical ladder tray.