What would the prefix be for a nonmetallic pipe penetrating a 4-1/2" concrete floor?

The correct prefix for a nonmetallic pipe penetrating a 4-1/2" concrete floor is "P-NM-4XXX." This prefix indicates that the penetration is for a nonmetallic (NM) pipe, which is specifically relevant when dealing with firestop systems that need to accommodate different materials.

The use of "P" signifies that it is a pipe penetration, while "NM" clearly indicates that the material of the pipe is nonmetallic. The "4" in the middle references the size of the circular hole being penetrated, which in this case is 4-1/2". The "XXX" signifies that there can be various configurations or specifics that may be required depending on the situation, allowing for flexibility in identifying different types of installations or requirements.

This classification system is vital in firestop training as it helps ensure that the proper firestop systems are used for various materials and configurations, which is essential for maintaining fire resistance ratings and ensuring safety. Understanding the correct terminology and codes used in firestop applications is crucial for effective communication and implementation in the field.