77 Ill. Adm. Code 330.3380
Corridors
Section 330
Section 330.3380Â Corridors
Every building shall meet the
following requirements:
a)Â Â Â Â Â Â Â Â All corridors required for exit access shall have a minimum
unobstructed width of six feet. They shall be equipped on both sides with
sturdy handrails, one and one-half inches clear of the wall. (A, B)
b)Â Â Â Â Â Â Â Â Exit corridors shall be one hour fire resistance rated
construction. (A, B)
c)Â Â Â Â Â Â Â Â All wood doors shall be one and three-fourths inch wood, solid
core or equivalent. Glass lights shall be wire glass, limited to 720 square
inches in size. Louvers in doors shall not be permitted. (A, B)
d)Â Â Â Â Â Â Â Â Fixed wired glass vision panels may be placed in corridor
walls, provided they do not exceed 1,296 square inches in size having a maximum
dimension of four feet, six inches and are installed in approved steel frames.Â
Fixed wired glass vision panels may be installed in wood doors, provided they
do not exceed 720 square inches in size and are installed in approved steel
frames. (A, B)