See Minimum Requirements Summary Sheets I and J for special requirements and exceptions which may be allowed in alterations and historic preservation. See also ADAAG 4.1.6 and 4.1.7.
| Section | Item | Technical Requirements | Comments | Yes | No |
|---|---|---|---|---|---|
| 4.7.1 | Curb Ramp - Location: | Is there a curb ramp wherever an accessible route crosses a curb? | |||
| 4.7.2 4.8.2 |
Slope: | Is the slope of the curb ramp 1:12 or less in new construction? | |||
| 4.7.2 | Transition: | Is the transition from the curb ramp to the walkway and to the road or gutter flush and free of abrupt changes? | |||
| Counter Slope: | Are the running slopes of the road, gutter or accessible route adjoining the ramp no greater than 1:20? | ||||
| 4.7.3 | Width: | Is the width of the curb ramp, not including the flared sides, at least 36 inches? | |||
| 4.7.4 4.5.1 |
Surface: | Is the surface of the curb ramp stable, firm and slip-resistant? | |||
| 4.7.5 | Side Flares: | If the curb ramp is located where pedestrians must walk across it or where it is not protected by handrails or guard rails, does it have flared sides? | |||
| Side Flare Slope | Do these flared sides have a slope of 1:10 or less? | ||||
| Where the space at the top of the ramp is less than 48 inches and wheelchair users must use the side flares for access, do the flared sides have a slope of 1:12 or less? (See Figure 12(a)) | |||||
| 4.7.5 | Returned Curbs: | If sharp return curb cuts are present, is pedestrian cross traffic prohibited by walls, guardrails, shrubbery, or other elements? (See Figure 12(b)) | |||
| 4.7.6 4.6.3 |
Built-up Curb Ramps: | Are built-up curb ramps located so that they do not project into vehicular traffic lanes or parking access aisles? | |||
| 4.7.7 | Detectable Warning: | Does the curb ramp have a detectable warning? | |||
| 4.29.2 | Domes: | Does the detectable warning consist of raised truncated domes? | |||
| Size and Spacing: | Are the truncated domes 0.9 inches in diameter and 0.2 inches in height with a center-to-center spacing of 2.35 inches? All measurements are nominal. (See Figures below) | ||||
| Visual Contrast: | Does the detectable warning contrast visually with adjoining surfaces (light-on-dark or dark-on-light)? Is the material used to provide contrast an integral part of the walking surface? | ||||
| 4.7.8 | Parked Vehicles: | Are curb ramps located or protected so that they will not be obstructed by parked vehicles? | |||
| 4.7.9 | Curb Ramps at Crosswalks: | Are curb ramps at crosswalks wholly contained within the crosswalk lines, except for the flared sides? | |||
| 4.7.10 | Diagonal Curb Ramps: | If diagonal (or corner-type) curb ramps have returned curbs or other well-defined edges, are these edges parallel to the direction of the pedestrian traffic flow? | |||
| Bottom of Diagonal: | Is there at least 48 inches clear space within the crosswalk lines at the bottom of a diagonal curb ramp? | ||||
| Straight Curb: | If the diagonal curb ramp has flared sides, is there at least a 24 inch segment of straight curb located on each side of the curb ramp within the crosswalk lines? | ||||
| 4.7.11 | Island: | Where an accessible pathway crosses an island, is the
island cut through at street level? OR Are there curb ramps on both sides and a level area at least 48 inches long between them? (With a 6 inch high curb, the island will be at least 16 feet wide.) |
; |
If the landing depth at the top of a curb ramp is less than 48 inches, then the slope of the flared side shall not exceed 1:12.
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