What would the prefix be for a cable tray in a concrete block wall?

The designation for a cable tray installed in a concrete block wall typically uses a specific prefix that indicates both the type of material and the installation environment. This naming convention helps to standardize firestop applications according to the construction assembly.

The correct choice indicates a prefix that starts with "W," suggesting it pertains to a wall assembly, which matches the context of being in a concrete block wall. The "J" might further signify that it is a junction point related to cable management systems. The number "4XXX" follows, which indicates a specific rating or classification number tied to the installation type or configuration relevant within the firestop context.

This classification is important for professionals in ensuring compliance with fire safety codes and standards, as it dictates how firestopping materials and methods need to be applied in various situations.