Metal fire doors are an economical alternative to wood fire doors when more than a 20 minute rating is required.
Installing glass in a 3 hour fire door.
Fire rated steel doors play a vital role in keeping people safe and minimizing property damage during a fire.
Some local building codes do not recognize the use of glass lights in 3 hour fire doors.
Recent code changes and fire tests have allowed for the use of listed glass lights designs.
Terminology used in describing these frames follows as closely as possible the american national standard for nomenclature for steel doors and steel door frames ansi a250 7.
100 0 69 12 33 note.
Hinge fire door installation video.
Labeled fire doors control the spread of fire and smoke for up to 3 hours.
A door with this rating may also be located in the exterior wall of a building subject to moderate fire exposure from the outside of the building.
To increase the amount of glass in 60 and 90 minute doors requires fire resistance.
The minimum rating is 20 minutes meaning the door can.
Protection association for fire doors and fire windows nfpa 80 and the door components installation instructions.
Door in a fire wall it is further restricted to 100 sq.
Individual lite sizes cannot exceed max.
3 hour doors are not permitted to have fire protection rated glass.
Inches with no dimension exceed ing 10 inches.
2 5 3 4 hour 45 minute doors.
Doors with 3 4 hour fire protection ratings are used in one hour walls.
Backbend return face stop soffit rabbet throat.
There is no glass allowed in a fire rated door if it has a louver and no louvers at all can be installed in a 3 hour rated door.
L b t series doors if firelite or other 3 hour listed glazing material is used.
A 3 4 hour rated door is required in walls of corridors and room partitions.
Steel is the sole door material to deliver a 3.
Check with frame manufacturer for maximum tested glass sizes and required stop height.
This information is intended for general reference only.
2 6 1 3 hour 20.
Stairwell doors have to be fire rated but they will also have to be rated as the temperature rise type if the building is 4 stories or higher.
20 45 minute doors still require fire protection rated glass up to the maximum size tested.
Exposed area shown above.
Historically a 3 hour fire door could not include a glass light.