The thermally separated VISS EI30 post and mullion structure has now been tested with frame widths of 50 mm and 60 mm – thus ensuring that virtually no wishes are left unfulfilled in terms of the choice of the glazing and its dimensions. Made from welded flat steel, the VISS façade systems can bear glass loads of up to 1800 kg. Various types of glass from different manufacturers have undergone testing. The maximum permitted glass di-mensions are 2700 mm in width x 4600 mm in height (in portrait format) – which provides for an impressive surface area of more than 12 square me-tres! With filling element thicknesses of up to 70 mm, an Uf value of up to 0.96 W/m²K can be achieved.