Docm indicates vision panels that comply with the uk document m standard requiring a zone of visibility between 500mm and 1500mm from the floor.
Standard vision panel door.
Door size 2040 x 926 x 54 height x width x depth.
Vision panels exceeding 100 square inches in 60 and 90 minute doors require fire resistive glazing.
To create the maximum vision panel size incompletion the formula is as follows.
This calculation below is the max height for allowance.
The 2012 ibc model building code contains size limits for vision panels in a 60 or 90 minute door.
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.