BASIS FOR ASTM-E-1300 ANNEALED GLASS THICKNESS SELECTION CHARTS

In the early 1980s, a glass failure prediction model (GFPM) was introd uced to resolve differences in U.S. industry procedures used to determ ine the minimum thickness of glass required to resist a specified unif orm lateral pressure. The differences in these industry procedures con tinue to cause problems for designers who are forced to choose between two different glass thickness selection methods that result in differ ent specified thicknesses of glass for the same loading. Since its int roduction, the GFPM has helped resolve industry conflicts as it has ga ined increasing acceptance. In the late 1980s, the GFPM was used to de velop glass thickness selection information that is incorporated in AS TM E 1300-94. The purpose of this paper is to provide documentation fo r the ASTM E 1300-94 glass thickness selection procedure and to propos e improvements. The proposed improvements include modifications to the optional procedure for calculating the probability of failure of a re ctangular glass plate, and the presentation of a new set of dual-unit glass thickness selection charts.