R404 — Clear Spaces

R404.1 General. Clear spaces shall comply with R404. R404.2 Surfaces. Surfaces of clear spaces shall comply with R302.6. The slope of the clear space shall be 1:48 (2.1%) maximum in both directions. Exception: Where the slope of the clear space would exceed 1:48 (2.1%) in either or both directions due to the grade of an adjacent pedestrian access route conforming to the requirements of R302.4, the slope of the clear space may be consistent with the slope of the pedestrian access route. R404.3 Size. Clear spaces shall be 30 inches (760 mm) minimum by 48 inches (1220 mm) minimum. R404.4 Knee and Toe Clearance. Unless otherwise specified, clear spaces shall be permitted to include knee and toe clearance complying with R405. R404.5 Position. Clear spaces shall be positioned either for forward approach where the 30-inch side is nearest to the element, or for parallel approach where the 48-inch side is nearest to the element. Clear spaces shall not be located on curb ramp runs or flares. R404.6 Approach. One full unobstructed side of a clear space shall adjoin a pedestrian access route or adjoin another clear space. R404.7 Maneuvering Clearance. Where a clear space is confined on all or part of three sides, additional maneuvering clearance shall be provided in accordance with R404.7.1 and R404.7.2. R404.7.1 Forward Approach. The clear space and additional maneuvering clearance shall be 36 inches (915 mm) wide minimum where the depth of the confined space exceeds 24 inches (610 mm) measured perpendicular to the element. R404.7.2 Parallel Approach. The clear space and additional maneuvering clearance shall be 60 inches (1525 mm) wide minimum where the depth of the confined space exceeds 15 inches (380 mm) measured perpendicular to the element.