## 1 Introduction  
Due to its unique properties, glass has been used in buildings as a so-called \"secondary structural glass component\", which means that it is used, for example, in windows or partition walls. In this case, the loads act normally on the glass elements, and the principal stresses result from pure bending. However, nowadays, glass is also used as a \"primary structural component\", which means that glass elements are part of the global structure and the loads act in the glass plane. In such cases, the glass elements are typically used as beams or columns. Due to their high slenderness, stability issues must be taken into account. Different investigations were made on the stability behavior of glass elements, like in [1; 2; 3; 4; 5] for the buckling of columns under normal force or in [6; 7; 8; 9; 10; 11; 12; 13; 14; 15] for lateral-torsional buckling (LTB) of beams under bending. The investigations were carried out experimentally as well as analytically and numerically. Single glass panels were taken into account as well as laminated glass beams, with and without lateral supports. Additional information on using glass as a shear-element can be found, for example, in [16]. Especially in the case of lateral-torsional buckling problems, all the investigations mentioned above were made on single-span girders. However, a frequent application of glass beams in bending is the cantilever beam, e.g., as a canopy in front of an entrance. Unfortunately, there is little information available on this kind of usage, see [17; 18]. By designing glass components, the selection of an appropriate glass type to ensure the safety requirements is an essential step. For \"secondary structural glass components\", the requirements,depending on their usage, are already regulated in standards and will not be discussed any further (see [19]). For \"primary structural glass components\", higher requirements are usually placed on the safety level. Important aspects here are the glass strength, the robustness against local damage or local impacts, and the redundancy of the structure. These aspects will be further discussed (also compare [19]). In buildings, float-glass is the mainly used glass type for \"secondary structural glass components\". By thermal treatment, float-glass can be further processed to fully tempered glass (FT) or heat strengthened glass (HS). Due to the thermal-induced stresses (compressive stresses at the surfaces), the thermally treated glass types can carry higher loads, which is a great advantage, especially for use as a \"primary structural glass component\". Besides, thermally treated glass types are more resistant to local impacts, e.g., due to hail or vandalism. In contrast to float-glass, however, thermally treated glass is more expensive. Single glass panels can be further assembled to \"laminated safety glass\" by connecting them with an interlayer (typically PVB-foil). If one of the glass panels breaks, the shards will stick to the foil. This reduces the risk of injury, and the intact glass panels can take over the load of the broken panel. This effect achieves a certain (local) redundancy of the glass component. The outer glass panels can also be regarded as protective layers of the inner panels. Due to the brittle nature of the material, the use of a single glass panel for \"primary structural glass components\" is not recommended. It should also be noted that the redundancy should not be limited to the glass component alone. Instead, the (global) redundancy of the whole construction should always be considered, which means, if a glass component fails, a safe load transfer via alternative load paths should be possible. As mentioned above, the focus of the presented investigations is on the load-carrying behavior of cantilever beams made of glass, taking stability issues into account.