The gap area between firestop packs and cables should not exceed 1 cm2, and the packing thickness should be not less than 24 cm. Where cables pass through shafts, walls, slabs, or enter electrical panels or cabinets, openings shall be tightly sealed with firestopping materials in accordance with. Bessive New Materials Co. is strategically nestled in the thriving Xiangjiang New District, Hunan Province, proudly specializing in the innovative production, cutting-edge R&D, and dynamic sales of state-of-the-art fire protection systems, along with comprehensive building passive fire. The following charts give the number of 3M pillows needed to completely firestop an opening that cable tray passes through. * Two (2) sticks of moldable putty (part number FSP-MPS) are also needed for each opening. UL Listed Systems Concrete Wall - C-AJ-4056 3 HR F-Rating, 3/4 HR T-Rating Gypsum. Cable trays are intended for the construction of fire-resistant cable paths. Let us know about your needs and wishes. A rung spacing of 6 to 9 inches (150 to 230 mm) is preferable when the cable tray cont d for instrumentation and control applications that require.
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