A fire rated door for 3 hours can have one glass light maximum:
100 square inches and must have an approved glass (Firelite type)
Max glass size cannot exceed 12" in width or 33" in height.
Wi...
When dealing with glass lights in doors, there are three (3) critical dimensions which must be coordinated:
Exposed Glass Size (EGS) - the horizontal and/or vertical dimensional size of the vision...
Minimum dimensions to cutouts for glass lights:
Vertical edge of door to edge of cutout = 5 29/32"
Top of door to top of cutout = 6"
Bottom of door to bottom of cutout = 10"
Reinforcing chann...