Cable trays and busways at floor level or at slab penetrations shall have a waterstop no less than 50 mm in height. At slab penetrations, provide 20–30 mm of firestopping and install a fire-support plate at the top. Sealing shall be tight and reliable, without visible cracks. Cable tray installation must comply with specific technical standards to ensure electrical safety, system reliability, and long-term maintainability. This document outlines the key requirements for cable tray layout, installation, and fireproofing in industrial and commercial environments. Do you need help with your purchase? The HERMI team will be happy to advise you and help you find the most suitable solution for your situation. Let us know about your needs and wishes. 7 products are successfully used to protect cables in high-rise buildings, industrial buildings, and offshore facilities as well as in sensitive areas, such as hospitals, airports, production. Ladder Type Cable Trays SIESA® offer a reliable and safe solution for the management of electrical cables and instrumentation. This includes checking their flammability, smoke production, toxic gas emissions, and ability to block heat and fire.