2.9 Protruding Objects.
Constructed features, including signs, water sources, and so forth shall not extend into the space above an ORAR more than 4 inches (100 mm) if they are between 27 inches (685 mm) and 80 inches (2030 mm) above the surface of the ORAR.
2.9.1 Natural Elements.
Accessibility guidelines for protruding objects do not apply to natural elements such as tree branches and rock formations. However, safety regulations or Forest Service construction and maintenance standards may define clear space and limit the allowable extension of natural protruding objects over the ORAR surface.
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