A brief presentation on the basic principals of firestopping.

14. UL Designations For Firestop Systems Translation: This system, CAJ-1044, can be specified for use on metallic piping such as steel, iron, or copper tubing and copper pipe with specific outside dimensions, and installed through concrete floors or walls 5 to 8 inches thick or in framed floors.

15. UL Designations For Firestop Systems In a nutshell, the tested firestop system is given a letter designation indicating what type of floor or wall assembly the firestop system has been tested in: concrete, masonry, gypsum, etc. Following the letter is a number designation referring to the type of penetrating item that has been tested, such as metallic pipe, non-metallic pipe, cable, electrical, etc.

20. Ratings of UL Firestop systems Also located in the UL Fire Resistance Directory Vol. 2 are the F, T and L ratings for each firestop system. These are hourly ratings that indicate specific performance capabilities and correspond to building code requirements. The Directory defines these ratings as follows:

21. Ratings of UL Firestop Systems The F rating provides "the time period for which the system is capable of prohibiting the passage of flame through the system and requires acceptable hose stream performance."

22. Ratings of UL Firestop Systems The T designation indicates "the time period for which the system is capable of limiting the maximum temperature rise on the unexposed surface of the wall or floor assembly, on the penetrating item, and on the fill material in the annular space, not to exceed 325° F (181° C) above ambient temperature, and requires acceptable hose stream performance."

23. Ratings of UL Firestop Systems The L rating designates "information concerning the amount of air leakage, in cubic feet per minute per square foot of opening through the firestop system and/or 400° F air temperatures at an air pressure differential of 0.30 in W.C."