The RP-ISO-hermetic 45N cur-tain wall system, with the narrow sight line of the mullion and transom profile, is captivating. This meets the desire of architects and planners striving to design and install curtain walls made of composite glazing with an appearance that is as continuous as possible. By using the largest possible span widths, the static properties of this advantageous steel system bring in a maximum amount of light. Thanks to the innovative screw/plug technolo-gy, the system can be completely pre-assembled in the workshop. Installation requirements on the building site are thereby signifi-cantly reduced. RP-ISO-hermetic 45N also meets the highest standards in terms of system safety, heat insulation and fire protection. The strip galvanising on both sides of the profile also provides sufficient corrosion protection.