Maximum Glass Size For One Hour Fire Rated Door

A recently finalized revision to the ibc model building code limits the size of fire protective glazing such as safety wired glass and safety ceramic used within vision panels for 60 or 90 minute temperature rise doors to no more than 100 square inches whether or not sprinklers are present.

Maximum glass size for one hour fire rated door.

Exterior walls permit 20 90 minute fire protective glazing for fire windows depending on fire separation distance and occupancy type in the section 705 of the 2012 ibc. Frame tests performed in accordance with. 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.

Maximum glass light size for a 90 minute 1 1 2 hour door depends on the type of glass being installed. 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. Ul 9 nfpa 252 can 4 s104 astm e119 larr 25798 ul 10b nfpa 257 can 4 s106 ul 10c openings with doors maximum width 12 6 3 81 m maximum height including transom 10 11 7 8 3 35 m 45 minute openings without doors maximum width 12 7 1 2 3 84 m maximum height 10 1 3 07 m minimum wall thickness 3 3 4 095 m.

3 hour doors are not permitted to have fire protection rated glass. Maximum glass light size for a 90 minute 1 1 2 hour door depends on the type of glass being installed. Inches with no dimension exceed ing 10 inches. 20 45 minute doors still require fire protection rated glass up to the maximum.

If a designer wishes to use more glazing then 1 hour fire resistive glazing like superlite ii xl 60 should be used to meet code requirements. There is a problem with the unqualified statement fire ratings up to 3 hours and here s why. 60 minute 90 minute and 180 minute fire protection rated vision lites in fire doors are limited to 100 sq. Note many code are outlawing the use of wire glass due to the hazards of injury from glass breakage.

If the door serves as a horizontal exit door in a fire wall it is further restricted to 100 sq. Wire glass 100 square inches is max exposed glass when wire glass is used. Maximum glass light size for a 90 minute 1 1 2 hour door depends on the type of glass being installed. What is the maximum glass light size on a 90 min 1 1 2 hour fire rated door.

Wire glass 100 square inches is max exposed glass when wire glass is used. While it is true that ceramics a fire protective glazing product are listed up to 3 hours it is purposely.