Vision panel limitation is by using fire resistive glazing that meets astm e 119.
Vision panel fire door regulations.
Ada section 404 2 11 requires that at least one of the vision panels in a door and sidelites adjacent to a door be no more than 43 inches 1090 mm above the floor line to provide visibility and safe access for all.
The only way to exceed the 100 sq.
For reasons of security door leaves and side panels wider than 450mm have vision panels towards the leading edge of the door whose vertical dimensions include at least the minimum zone or zones of visibility between 500mm and 1500mm from the floor if necessary interrupted between 800mm and 1150mm above the floor e g.
To accommodate an intermediate horizontal rail see diagram 1 above.
Glazed vision panels are often used within door leaves to let light into a room for aesthetic reasons or for safety i e.
Regardless if the building is fully sprinklered.
Vision panels exceeding 100 square inches in 60 and 90 minute doors require fire resistive glazing.
The door vision panels for the 90 minute pair doors are allowed to exceed 100 square inches because the door incorporates fire resistive glazing that meets astm e 119.
At least one accessible door.
The 2012 and 2015 ibc limits the size of ceramics and fire protective glazing used in the door vision panel in 60 90 minute exit stairway or passageways to 100 sq.
Allowing people using the door to be seen vision panels should be towards the leading edge and with vertical dimensions including at least the minimum zones shown either with or without a horizontal rail.
Vision side lights if provided 404 2 11 accessible viewing height 43 max.
Unless it can be argued otherwise in the access statement e g.