The Building Code of Australia (BCA) provides more stringent requirements for glazing on a path of travel in a building required to be accessible by people with a disability and in particular caters for users with a vision impairment. Where there is no chair rail, handrail or transom, all frameless or fully glazed doors, sidelights and any glazing capable of being mistaken for a doorway or opening must be clearly marked in accordance with AS 1428.1.
The glazing must be clearly marked for its full width with a solid and non-transparent contrasting line of not less than 75 mm wide. The contrasting line on the glazing is required to provide a minimum of 30% luminance contrast when viewed against the floor surface or surfaces within 2 metres of the glazing and must be located between 900 mm and 1000 mm above the adjacent floor level.
The indicators must be a solid line and individual logos or patterns are not acceptable. It is often problematic for installers to determine the 30% luminance requirements where the background surfaces vary in colour.