Any glazing in a fire door must perform equal to the door core. It's not just the type and thickness of the glass that matters, the size of each piece of glass, the glazing gasket and the beads that hold it in place are all critical to the integrity of the door and must be fitted according to the test evidence. Generally glazing will be factory applied to ensure full compliance.
Asico offers variety of fire door glazing designs commonly. Actually cut out sizes are shown, visible glass will be approx 15m less on all sides. Actual cut out height dimensions will be determined by the oversall height of the door.