Detection of heterogeneities in distribution of residual stresses in tempered float glass

A photoelastic method was proposed to examine quality of tempered float glass used in the building facade of the ten-store office building. It turned out that strong disturbances in distribution of residual stresses were present in examined glass, facade panels. It can be concluded that these disturbances were the cause of spontaneous breakages of glass panels, which took place in some circumstances. The proposed inspection procedure is cheap and very effective.