There are various reasons for glass or infill removal from a structurally glazed window system. Reasons might include removal due to glass breakage, for quality control purposes or even a desire to upgrade to more energy efficient glass. The removal of glass from a structurally glazed window system is typically called "deglazing" by the glass and glazing industry. The original version of this document was approved and published in 2014. This edition of the paper was updated and published in February 2020.