Sketch based on ADA Standards Figure 8(c-1) 0 Overhead Hazards
Side view of the underside of a stair with the underside exposed from ceiling to floor. A blind person using a cane to detect hazards approaches the underside of the stair.
An area under the ceiling and stair with a height of at least 80 inches is hatched to indicate no protruding object hazard. A planter is located where the height is less than 80 inches to alert the blind person to the protruding object hazard.
accessible route or circulation space (indicating space where people walk)
person using long cane detects warning barrier and avoids head injury (pointing to area where the planter is located - with a height of less than 80 inches)
80" min. (referring to the minimum height of circulation space)