Autoclaved Aerated Concrete - Material Advantages - Fire Resistant
AAC is non-combustible. So in the case of fire, no toxic gases or vapors are emitted.
Solid AAC construction without any additional finishing materials, provides a fire rating of 4 hours for a 6 inch minimum wall. This exceptional rating meets even the most stringent requirements of the Standard Building Code. A 4 inch AAC - panel wall construction, without any additional finishing materials, achieves a rating of 3 hours.
| TYPE | FIRE RESISTANCE | MINIMUM THICKNESS | UL DESIGN | COMMENTS |
| Floor Panels | 4 hour | 6” | K908,K909,K910 | restrained or unrestrained |
| Roof Panels | 4 hour | 6” | P931,P932,P933 | restrained or unrestrained |
| Block/Wall Panel | 4 hour | 4” | U916,U918,U919,U921 | non bearing |
| Block/Wall Panel | 4 hour | 6” | U916,U918,U919,U921 | non bearing or bearing lintels |
| Block/Wall Panel | 2 hour | 2” | V420 | bearing wall attached to Steel Stud System |
| Block/Wall Panel | 4 hour | 4”, 8” | X901 | Steel Column Protection |
AAC provides the highest security against fire and meets the most stringent fire safety requirements. It is both resistant to fire up to 2192°F and, unlike other construction materials, heat-resistant. AAC can thus be used as a fire wall to prevent fire from spreading, thereby protecting lives and economic assets.
In a real blaze, an AAC fire wall even survived intact for 120 hours. Small wonder, then, that AAC is used in fire safety tests as a building material for kilns to measure the fire resistance properties of other construction products. Some insurance companies offer reductions in fire premiums for buildings with AAC fire walls.
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