Heat Treated Glass for Architectural Glazing

This Technical Document provides detailed information regarding heat-treated glass suitable for architectural glazing applications. It discusses the distinctions between heat-strengthened and tempered glass, including their production processes and performance characteristics. The document outlines the importance of selecting the appropriate type of heat-treated glass to resist wind and snow loads, as well as to comply with building codes. It explains the phenomenon of spontaneous breakage in tempered glass, often attributed to nickel sulfide inclusions, and the measures taken by manufacturers to mitigate this risk. The document also covers the implications of glass breakage patterns, emphasizing that tempered glass tends to break into small pieces, while heat-strengthened glass remains largely intact. Additionally, it mentions the industry standards governing these glass types, specifically ASTM C1048 and ASTM C1279, which set forth specifications for their production and testing. Recommendations for the use of heat-treated glass in architectural designs are also included.