Craig-

Here's a brief overview of glass-types in commercial buildings (Types of Glass bottom of page 4 of 24, as shown at bottom of Adobe Reader), including breakage characteristics.

Not sure it will help much. Says installers have trouble determining which kind of glass by just looking, and all types of glass possibly present in same building. <img src="/images/graemlins/confused.gif" alt="" />
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"Things that have never happened before happen all the time." — Scott Sagan, The Limits of Safety