2006 International Building Code

For SI: 1 foot = 304.8 mm.
a. Values given are percentage of the area of the exterior wall.
b. See Section 704.7 for unexposed surface temperature.
c. For occupancies in Group R-3, the maximum percentage of unprotected and protected exterior wall openings shall be 25 percent.
d. The area of openings in an open parking structure with a fire separation distance of greater than 10 feet shall not be limited.
e. For occupancies in Group H-2 or H-3, unprotected openings shall not be permitted for openings with a fire separation distance of 15 feet or less.
f. For requirements for fire walls for buildings with differing roof heights, see Section 705.6.1.
g. The area of unprotected and protected openings is not limited for occupancies in Group R-3,with a fire separation distance greater than 5 feet.
h. For special requirements for Group U occupancies, see Section 406.1.2.
i. Buildings whose exterior bearing wall, exterior nonbearing wall and exterior structural frame are not required to be fire-resistance rated by Table 601 or 602 shall be permitted to have unlimited unprotected openings.
j. Includes accessory buildings to Group R-3.

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