Architectural glass that is monolithic, laminated, or insulating has traditionally been supported by capturing the edges of the glass. As architects have expressed their desire to make the walls of the buildings even more transparent, engineers have developed methods of reducing the size of the supporting structures. In recent years, especially in Europe, it has been increasingly popular to attach the glass to the structure using bolted fittings directly connected through holes in the glass. These fittings allow improved transparency and offer additional architectural opportunities in the detailing of the bolted connections. This document discusses this type of glass application. This document was originally published in May 2012 and reissued in September 2019.