Another group of hardware components are for railings. Railings made of glass are divided into two major groups. In case of fiirst group the glass is only filling of railings, usually between the posts. In the second case glass acts as a support structure for itself and people, it is therefore necessary to design individual mounting and positioning of the glass assembly. Fixing the glass is generally carried out by rotules bolted to the floors / stairs or through the use of linear systems, fixing railings.