https://www.pilkington.com/en/global/commercial-applications/glass-applications/glass-structureGlass Structure The world’s leading structural glass system, Pilkington Planar™ opens up vast possibilities for architects, allowing them to create a complete glass envelope for buildings with frameless façades on any plane.. Support structures, located internally or externally, can use glass mullions, a conventional steel construction or the revolutionary Pilkington Planar™ Tension ...