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Exterior walls of an exit enclosure shall comply with the requirements of Section 705 for exterior walls. Where nonrated walls or unprotected openings enclose the exterior of the stairway and the walls or openings are exposed by other parts of the building at an angle of less than 180 degrees (3.14 rad), the building exterior walls within 10 feet (3048 mm) horizontally of a nonrated wall or unprotected opening shall have a fire-resistance rating of not less than 1 hour. Openings within such exterior walls shall be protected by opening protectives having a fire protection rating of not less than 3/4 hour. This construction shall extend vertically from the ground to a point 10 feet (3048 mm) above the topmost landing of the stairway or to the roof line, whichever is lower.

Related Code Sections

1022.6 Means of Egress, Exit Enclosure Exterior Walls
Exterior walls of an exit enclosure shall comply with the requirements of Section 705 for exterior walls. Where nonrated walls or unprotected ...
1022.6 Means of Egress, Exit Enclosure Exterior Walls
Exterior walls of an exit enclosure shall comply with the requirements of Section 705 of the International Building Code for exterior walls. Where ...
707.4 Fire and Smoke Protection Features, Exterior Walls
Where exterior walls serve as a part of a required fire-resistance-rated shaft or exit enclosure, or separation, such walls shall comply ...
707.4 Fire and Smoke Protection Features, Exterior Walls
Where exterior walls serve as a part of a required fire-resistance-rated shaft, or separation or enclosure for a stairway, ramp or exit ...
708.6 Fire and Smoke Protection Features, Exterior Walls
Where exterior walls serve as a part of a required shaft enclosure, such walls shall comply with the requirements of Section 705 for exterior walls ...