Section 1015.1/Guards
IBC 1015 requires guards at open-sided walking surfaces, mezzanines, stairways, ramps, and landings more than 30 inches above the floor or grade below.
Guards must be provided along open-sided walking surfaces, including mezzanines, equipment platforms, stairs, ramps, and landings that are located more than 30 inches above the floor or grade below. Guards must be at least 42 inches high measured vertically from the leading edge of the stair tread, walking surface, or seat. Guard openings must not allow passage of a 4-inch sphere.
Why this section exists
Falls from elevation are one of the leading causes of serious injury and death in buildings. Guards prevent occupants from accidentally falling from elevated walking surfaces, stairs, and platforms. The 42-inch height is based on the center of gravity of a standing adult. The 4-inch sphere requirement prevents small children from passing through guard openings.
What plan reviewers look for
Plan reviewers check floor plans and sections for any open-sided condition more than 30 inches above the floor or grade below. They verify that guards are shown at those locations, that guard heights are dimensioned (42 inches minimum), and that the guard detail shows compliance with the 4-inch sphere opening limitation.
Common violations
Related IBC requirements
Section 1011 covers stairway requirements including handrail heights (34 to 38 inches). Section 1015.3 covers mechanical equipment guards. Section 1015.6 covers guard height at glazing. The IRC Section R312 covers guards in dwelling units with a 36-inch height allowance.