Marinite I being installed with 11⁄2″ x 11⁄2″ x 1⁄4″ steel angle along the long dimension of the boards (bottom view).

The cables were first enclosed in rigid steel conduit.
A simple steel frame of 11⁄2″ x 11⁄2″ x 1⁄4″ steel angle surrounds the conduit and acts as a supporting frame. Sheets of 1″ thick Marinite I panels were used to enclose the raceway which is approximately 3 feet square. The panels were fastened to the longitudinal angles with self-threading screws and washers.
No backup structure was needed at the joints between the Marinite boards.
The Marinite I panels, made of calcium silicate were first given a coat of Devguard™ 4160 or LOXON® conditioner and then finished with Devflex™ 4216HP or DTM Acrylic Coating.
At the ends of the cable raceways, the spaces between conduits and those between conduits and the Marinite sheathing were packed with

Marinite I fire-resistant cable tray system (fully installed).

a lightweight, mastic, fireproofing material. This prevents the ducting of flame along the inside of the fire-resistant raceway.
This raceway system has withstood both weather and unanticipated foot traffic with no problems, and the system has since been used in the expansion of an adjacent refinery.
Marinite fireproof structural insulating panels have many applications throughout a broad range of industry.
For further information on how Marinite panels and the many other BNZ refractory products can help solve problems in your business, call your BNZ representative.