Glass breakages after 6 to 12 months of installation

All are of the contention that post installation breakages happen only due to Nickel sulfide. My argument is slightly different it can be due to an installation error and a major factor as something called settling down / deflections to the whole structure. If anybody has similar or difference in opinion or experience Please do join in. Glass spec is 6 mm FT +1.52 SGP + 10 mm FT not heat soaked with four holes and (fixed) non articulated spiders from Dorma.

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