OAR 813-310-0040
Walk, Ramp, Handrail and Curb Ramp Requirements
(1)
Walks. Walks along a visitable exterior route shall meet the following criteria:(a)
Width. The minimum clear width of a walk shall not be less than 36 inches.(b)
Slope and Rise. The slope of a walk shall not exceed one unit vertical in 20 units horizontal (5% slope).(c)
Cross Slope. The cross slope of a walk shall not exceed one unit vertical in 33 units horizontal (3% slope).(d)
Edge Protection. Along a visitable exterior route, a continuous 2 inch high curb shall be required on both sides of walks that are 12 inches or higher above the adjacent grade. This applies to both flat and sloped portions of walks, regardless of size, as well as flat areas such as plazas and courts. Along a sloped walk, a portion of which requires a curb, the height of the curb shall gradually taper until the walk is no higher than 2 inches above adjacent grade.(2)
Ramps. Ramps along a visitable exterior route shall meet the following criteria:(a)
Width. The minimum clear width of a ramp shall not be less than 36 inches.(b)
Slope. The maximum slope of a ramp shall not exceed one unit vertical in 12 units horizontal (8.33% slope). The maximum rise for any run shall be 30 inches.(c)
Cross Slope. The cross slope of a ramp shall be a maximum of one unit vertical in 33 units horizontal (3% slope).(d)
Surface. Ramps along a visitable exterior route shall have a firm, stable, slip resistent surface.(e)
Landings. Ramps along a visitable route shall have landings at the top and bottom, and at least one intermediate landing for each 30 inches of rise. Landings shall have a minimum dimension, measured in the direction of travel of 60 inches. The width of any landing may not be less than the width of the ramp. Where the ramp changes direction, the minimum size of the ramp shall be 60 inches by 60 inches.(3)
Curb Ramps. Curb ramps shall be required where curbs lie along a visitable route.(a)
Width. Curb ramps shall have a minimum width of 36 inches.(b)
Slope. Curb ramps shall have a maximum slope of 1 unit vertical to 12 units horizontal. Transitions from curb ramps to walks, gutters and vehicular ways shall be flush and free of abrupt changes in height.(c)
Side Slopes. Curb ramps located where pedestrians must walk across the ramp shall have sloped sides whose slope does not exceed 1:10.(d)
Surfaces. Curb ramps along visitable exterior routes shall have a firm, stable, slip resistent surface.(e)
Location. Curb ramps shall be built so as not to project into vehicular ways or be located within accessible parking spaces.(4)
Handrails. Ramps with a total rise of 12 inches or less or a horizontal projection of 144 inches or less are not subject to the handrail requirement. The handrail requirement must be met on all other ramps. Where handrails are required, the handrail must meet the requirements set forth in chapter 11, division II-Element Requirements, Section 1109.10.11.3, Structural Strength, of the Oregon Structural Specialty Code as of July 1, 2004. Handrails shall have an outside diameter of not less than 1 1⁄4 inches or more than 2 inches, a 1 1⁄2 inch clear distance between the handrail and an adjacent wall, and must extend the full length of the ramp, including the landing. Unless otherwise required by federal or state code, a handrail on one side of the exterior visitable route is sufficient and need not include extensions beyond the length of the ramp and landing.
Source:
Rule 813-310-0040 — Walk, Ramp, Handrail and Curb Ramp Requirements, https://secure.sos.state.or.us/oard/view.action?ruleNumber=813-310-0040.