Tread Obstacles on Outdoor Recreation Access Routes
A tread obstacle is anything that interrupts the evenness of the tread surface. On outdoor recreation access routes, an obstacle may occur where a tree root or rock protrudes above the surface or where two different surfaces abut, such as when a concrete path joins an asphalt path. If they are pronounced, tread obstacles can pose a serious tripping hazard. Where tread obstacles exist along an outdoor recreation access route, they must not be more than 1 inch (25 millimeters) high. Where the surface is paved or is built with boards, obstacles must not be more than ½ inch (13 millimeters) high.
Design Tip
Avoid the use of stairs on outdoor recreation access routes.
In new construction, stairs aren't allowed on outdoor recreation access routes except at viewing areas where there is a condition for an exception. For new recreation sites, select locations that will not require the use of stairs.
Avoid the use of outdoor stairs wherever possible. Sometimes, an alteration project at an existing recreation site includes an area where stairs can't be avoided. When stairs are unavoidable, they should generally meet the requirements for stairs in Architectural Barriers Act Accessibility Standards. Although these requirements are not mandatory for stairs that aren't part of a means of egress for a building, compliance will ensure the stairs are safe and comfortable to use.
The accessibility guidelines for outdoor recreation areas do not require handrails for stairs. Consider the safety of the people using the stairs and the setting when deciding whether handrails are appropriate. What is the expected amount of use? How can the appearance of overdevelopment be avoided while providing for safe use of the stairs? When deciding whether handrails are necessary on outdoor stairs, also consider how many should be provided. For example, a few steps at an individual campsite may not need a handrail. Where a handrail would be helpful, one handrail in the center may accommodate low-volume, two-way traffic. Treads that are just wide enough for one-way traffic could have a handrail on one side. Two handrails may be needed if stairs are provided in hightraffic areas.
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