Ramps of appropriate design are required at every change of level not served by an accessible lift or lifting mechanism. A ramp is at least 1050 mm wide, has a clear 1500 mm by 1500 mm space at its head and foot onto which no door may swing, and is no steeper than 1 in 12 except for minor rises (1 in 10 for a rise of up to 150 mm over at most 1500 mm, or 1 in 8 for a rise of up to 75 mm over at most 600 mm), and such minor-rise ramps may not be combined. The Division's further obligatory items cover handrails to Division 8, kerbs or protection at the edges, tactile warning strips and a firm slip-resistant surface. The Best Practice Section recommends gentler gradients and intermediate landings.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.