A Consultants Toolbox for Investigating Nickel Sulfide Failures in Toughened Glass

Richard Harris, Robert Lilly & Tony Willmott

Although not a common occurrence a spontaneous failure of a pane of toughened glass is still a matter for concern for building owners and occupiers. Monolithic toughened glass is frequently found in atrium and lightwell wall glazing, lift enclosures and balustrade infill panels, the spaces around and beneath which are often places where people may gather or circulate. Should a spontaneous glass failure occur then the building manager invariably requires the risk of future failures to be properly quantified, in order that appropriate action can be taken.

It is essential that a consultant investigating a spontaneous failure of toughened glass is able to properly
establish the cause of the failure and, particularly if it is due to nickel sulfide, is able to take rational steps to properly quantify the resulting risk and required preventative measures.

This paper considers the factors which influence nickel sulfide induced failures of toughened glass, and looks at various analytical and qualitative tools that could be used as an aid to quantifying future risk.
Recommendations are also made for proper procedures for investigating the spontaneous failure of toughened glass.

Full-Text Article [130 KB]