A listed through penetration system that identifies a metallic pipe penetrating the fire-resistant assembly has a numeric value in the system number of?

The numeric value in the system number that identifies a metallic pipe penetrating a fire-resistant assembly falling within the range of 1000-1999 is based on established standards in fire protection and safety codes. This classification is critical for identifying the type of firestop systems and their specific applications regarding various penetrations.

A system number in this range indicates that the firestop system has been specifically tested and evaluated for its effectiveness in preventing the spread of fire and smoke through penetrations made by metallic pipes. Knowing this categorization helps professionals and inspectors ensure that they are using the correct materials and methods to maintain the integrity of fire-resistive assemblies, which is vital for safety in buildings.

The other ranges correspond to different types of penetrations or systems. For example, the ranges below 1000 typically are reserved for specific materials or applications that do not include metallic pipes. Therefore, the classification of 1000-1999 specifically denotes systems that are relevant to metallic pipe penetrations, emphasizing their importance in fire safety applications.