Single & Double Glazed
After a period of time, unitized design was occur in curtain wall technology. In this system, the mullion members are separately installed first, then pre-assembled framing units are placed between them. These units may be full story height, or they may be divided into a spandrel unit and a vision glass unit.
Hybrid system is advantage to use when for long span of two floors, which can be reinforced by steel. This system need large amount of labour for field jointing work and the erection time is comparatively greater.