5. LISTED FIRESTOP SYSTEMS
A UL / CUL listed firestop system contains complete information about a tested system as per ASTM and / or Canadian standards. It shows a typical assembly of all involved components / parameters with their detailed description. It mentions overall fire rating of the testing system along with a few possible variations of different parameters, the size range of different penetrating components, plus different possible materials. It also provides a list of all applicable product ranges for the given assembly.
Fire rating of the system as per ASTM E814
Min. required thickness of Floor or wall assembly
A valid type of components with details like annular space requirement
Max. size of all the allowed / valid penetrations along with valid material
Min. required thickness and density of packing material like mineral wool
Min. thickness of the sealant / firestop product to be used All Hilti products that can be used with this assembly
Fig. 5: Sample UL listing of through-penetration system
A UL system gives you information on different variations for a particular assembly / system. It is a complete document and considered credible among all the countries following UL / ASTM standards. One should first check the availability of a tested system for a particular arrangement onsite. If it is not available, only then the contractor should use the manufacturer’ s engineering judgment( EJ) services.
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