ASTM E-119 Testing. Fire tests have been conducted on many masonry wall assemblies, so the behavior of masonry materials is well documented and predictable. To help prevent building fires from spreading and protect lives and property, building codes require that walls, partitions, roofs and floor/ceiling assemblies in sensitive locations carry particular fire ratings. These ratings typically are expressed as 1, 2 or more hours and describe the rated assembly’s relative ability to remain intact when exposed to fire, in a controlled test, for the specified period of time.

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