What is the maximum door size for UL fire rated doors?

Maximum UL Fire Rated door sizes are as follows:

A-Series:

  1. 4' 0" X 8' 0" single door
  2. 8' 0" X 8' 0” double door or pairs

B-Series

  1. 4' 0" X 10' 0" single door
  2. 8' 0" X 10' 0” double door or pairs

CE-Series:

  1. 3' 0" X 8' 0" single door
  2. 3' 8" x 7' 0" single door
  3. 6' 0" X 8' 0” double door or pairs
  4. 7' 4" x 7' 0" double door or pairs

L-Series:

  1. 4' 0" X 10' 0" single door
  2. 8' 0" X 10' 0” double door or pairs

H-Series:

  1. 4' 0" X 8' 0" single door
  2. 8' 0" X 8' 0” double door or pairs

PW-Series

  1. 4' 0" X 9' 0" single door
  2. 8' 0" X 9' 0” double door or pairs

SL-Series:

  1. 3' 0" X 8' 0" single door
  2. 6' 0" X 8' 0" double door or pairs

T-Series

  1. 4' 0" X 9' 0" single door
  2. 8' 0" X 9' 0” double door or pairs
  3. Fire ratings for doors are influenced by (but not limited to) the following items:

Maximum doors size for Fire ratings is influenced by (but not limited to) the following items:

    1. Steel gage of the door - example: 20 gage door constructions are approved for smaller door sizes than what is shown above
    2. Frame applications - some frame applications are approved for smaller door sizes than what is shown above
    3. Hardware applications - some hardware applications are approved for smaller door sizes than what is shown above
    4. Glass sizes, glass type and glazing compound

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