In the last years, a tendency of an increasing of the number of in-building project built-in curved glass could be observed. In many realised projects around the world one can find such glass in various different applications with a big number of different geometries. These applications can principally be curved monolithic glass, laminated safety glass or insulated glass. Investigations in this field could be focused on, for example, the process of the bending of the glass to bring it into the right shape, or the very difficult topic of pre-stressing of such glass. How to design curved insulated glass is a big issue too. In comparison to flat insulated glass the internal pressure in the space between the glass layers due to the so-called climatic load is much higher. The state of the art of the production process of such glass shows some different kinds how it is possible to shape glass. The most used way is to transform the glass at a high temperature, over 550 deg C. In this case there is a change of the viscosity in connection with decreasing of Young's modulus at such high temperatures. Due to the gravity-effect, the weaker glass sag down into special designed moulds to obtain their geometries. Another kind of curved glass is the production in combination with the laminating process. Thermally pre-stressed glass can only be produced cylindrically shaped. In the case of other geometries the procedure fails. One solution can be to pre-stress the glass by chemical treatment. This is principally used for all possible shapes. All these different processes are on the first view easy, but very difficult in detail. This can be demonstrated by some bad examples.
