Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
Understanding the UL Fire Resistance Directories - Ron Blank ...
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<strong>Fire</strong> Resistive Properties of Gypsum<strong>Understanding</strong> <strong>UL</strong>• Gypsum is approximately 21% by weight chemicallycombined water.• This greatly contributes to its effectiveness as a fireresistive barrier.• Calcination is a process in which a material is heatedto a temperature below its melting point to effect a<strong>the</strong>rmal decomposition or a phase transition o<strong>the</strong>rthan melting.