Wire glass 100 square inches is max exposed glass when wire glass is used.
Maximum size 1 hour rated glass door.
To increase the amount of fire rated glass in 60 or 90 minute temperature rise doors and still meet code you must use fire resistive glazing that meets astm e119.
Note many code are outlawing the use of wire glass due to the hazards of injury from glass breakage.
Sidelites and transoms around a 20 minute fire door in a 1 hour exit require a 45 minute fire rating with hose stream.
To increase the amount of fire rated glass in 60 or 90 minute temperature rise doors and still meet code you must use fire resistive glazing that meets astm e119.
Furthermore sidelights and transoms placed in a 1 or 2 hour wall and door assembly in a shaft exit enclosure or exit passageway must also be fire resistive glazing.
Maximum glass light size for a 90 minute 1 1 2 hour door depends on the type of glass being installed.
Wire glass 100 square inches is max exposed glass when wire glass is used.
When the code requires fire doors rated 1 hour or more then the sidelites and transoms around that door must be fire resistive and rated to the same standard as the wall itself e g 1 or 2 hour.
Furthermore sidelights and transoms placed in a 1 or 2 hour wall and door assembly in a shaft exit enclosure or exit passageway must also be fire resistive glazing.
Sidelites and transoms around a 20 minute fire door in a 1 hour exit require a 45 minute fire rating with hose stream.
45 minute fire protective windows are permitted in a 1 hour exit corridor up to a maximum of 25 of the wall area.
20 minute fire doors with 20 minute vision panels without hose stream are permitted in a 1 hour exit corridor.