When designing with large expanses of glass, it is critical to know when the glass may need to be heat-treated for durability and/or safety. The type of processing required—heat strengthening or tempering—depends on the specific application.
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The first insulating glass units were developed in 1945 for the Pullman Car Company in Butler, PA.
A standard float tank can produce glass 24 hours/7 days a week for up to 15 years before it needs to be rebuilt.