External Stairs: The underside of stairs should be lighted after dark, and should be enclosed or
protected to prevent pedestrians walking underneath from head injury on the sloping underside
of the structure. Stair tread nosings, handrails and skirting should contrast with the treads in
color and values, and should be abrasive in texture. Where steps cross grades, tapered risers to
meet grade may be hazardous to the unwary pedestrian. Where possible, avoid tapering or use
handrails to guide the pedestrian to the full step-and-riser section of the stair/steps. Open risers
should be avoided.