All glazed doors are generally factory glazed to ensure the certification and specified performance of our doorsets are met incorporating the correct glass for the fire requirement and vision panel type. The vision panel bead design is generally a bolection type bead in fire applications although flush beads can be provided (as shown).
DocM indicates vision panels that comply with the UK Document M standard requiring a zone of visibility between 500mm and 1500mm from the floor. The visibility zone can be interrupted between 800mm and 1150mm (from the floor).