This confusion stems from a conflict between nfpa 80 size limits and the size limits prescribed by the ibc and the fact that the listing agencies have tested and listed fire protective glazing in sizes not permitted by the ibc.
Fire door vision panel height.
Standard vision panels not available in fd90 fd120.
Subject to door size.
The height of the panel needs to take into consideration the viewing level of users for example those in wheelchairs or children.
Glass sizes and core regulations when working with fd60 and 44m doors.
Fire protection rated glazing in fire doors located in fire walls shall be prohibited except where serving in a fire door in a horizontal exit a self closing swinging door shall be permitted to have a vision panel of not more than 100 square inches 0 065 m2 without a dimension exceeding 10 inches 254 mm.
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.
Regulations for maximum vision panel sizing on fire doors.
In a fire door it is important that the vision panel is rated at the same level as the fire door requirements otherwise the vision panel will fail before the rest of the door.
Glass sizes and core regulations when working with fd30 and 44m doors.
Users are frequently confused about the door vision panel sizes permitted in 60 and 90 minute fire doors under the ibc.
6 ft 6 in.