Basis for ASTM E 1300 Annealed Glass Thickness Selection Charts

Abstract

In the early 1980s, a glass failure prediction model (GFPM) was introduced to resolve differences in U.S. industry procedures used to determine the minimum thickness of glass required to resist a specified uniform lateral pressure. The differences in these industry procedures continue to cause problems for designers who are forced to choose between two different glass thickness selection methods that result in different specified thicknesses of glass for the same loading. Since its introduction, the GFPM has helped resolve industry conflicts as it has gained increasing acceptance. In the late 1980s, the GFPM was used to develop glass thickness selection information that is incorporated in ASTM E 1300-94. The purpose of this paper is to provide documentation for the ASTM E 1300-94 glass thickness selection procedure and to propose improvements. The proposed improvements include modifications to the optional procedure for calculating the probability of failure of a rectangular glass plate, and the presentation of a new set of dual-unit glass thickness selection charts.