Thanks to the rich offer of profiles, the architects and designers designing enginners may realize even the most bold concepts as regards the aluminium-glass structures. The system is intended for constructing and creating the light-weight curtain walls of hanging and filling type, as well as roofs, skylights and other structures. The shape of mullions and transoms allows building aesthetic facades with visible narrow dividing lines, ensuring the structure durability and resistance at the same time. Additionally, the profiles have rounded external edges, what gives the so-called soft-line effect. The large number of mullions and transoms available in this system guarantees the best possible aluminium use. The economic profiles were obtained by optimization of the intersection shape and by selecting the optimal wall thickness. At a very high load, all mullions may be additionally reinforced with typical internal aluminium profiles, increasing their resistance. The simple profile processing lowers the workload and eliminates all types of carvings at the side surfaces of the mullions.