Unavoidable protruding objects shall not reduce the minimum clear width of an accessible route or manoeuvring space. Protruding objects in the access route shall contrast visually with the background environment.
Objects with a height lower than 1 000 mm can create a hazard for blind or partially sighted people. Permanent equipment that cannot be located outside the boundaries of a path shall be,
a) designed to be easily seen with a minimum difference in LRVs of 30 points to the background;
b) shielded to protect against impact; and
c) accompanied by a feature that warns of the presence of a potential hazard and is detectable for a person using a white cane or stick (see Fig. 34).
The headroom along a path shall be maintained at a height of not less than 2 100 mm above the surface of the path.
Any objects projecting more than 100 mm between 300 mm and 2 100 mm above ground level into an access route shall be clearly visible and detectable with a cane (see Fig. 34).
When a projecting obstacle exists, a protective guard shall be provided at ground level, under the projecting object, such as, a kerb or fixed element at a height of 100 mm-300 mm as cane detection. Cane detection shall not be set back more than 100 mm from the face of the projecting object. Wing walls, side partitions, alcoves or recesses are solutions for projecting elements where free space under the object is needed. Winged protection shall extend continuously between 300 mm and 1 000 mm above the floor and shall contrast visually with the background.