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Weiwang - Firestop or Fireproofing System
Firestop or fireproofing is a form of passive fire protection. It is used to seal around openings and between joints in a fire-resistance-rated wall or floor assembly. Fire stopping is to seal around gaps between fire resisting constructions, e.g. the linear gap between a wall and the floor above, in order for construction to form a complete barrier to fire and smoke spread.
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Firestops are used in:
- Electrical, mechanical, and structural penetrations
- Unpenetrated openings (such as openings for future use)
- Re-entries of existing firestops
- Control or sway joints in fire-resistance-rated wall or floor assemblies
- Junctions between fire-resistance-rated wall or floor assemblies
- Head-of-wall (HOW) joints, where non-load-bearing wall assemblies meet floor assemblies
- Numeric characters are used to identify what penetrant, if any, can be found within the present system and help identify what UL-tested system was used.
- Classification for penetrations and the barriers they penetrate, are categorized by a standardized letter-number system that has been adopted by all firestop products manufacturers. A typical system would consist of several letters, followed by a series of numbers indicating the type of penetrant that is passing through the particular barrier ex: (FB-5533.)