Page 24 - Dubai Universal Design Code
P. 24

23. Ramp


               An inclined solid flat plane structure that is steeper than 5 % from the horizontal.
               Depending on the length it shall include an intermediate landing, which makes it
               possible to pass from one level to another.

               24. Rise


               Vertical distance between the upper horizontal surfaces of two consecutive treads, or of
               a landing and the next treads above or below it, or of a flight between consecutive
               landings.

               25. Riser


               Vertical component of a step between a tread or a landing and the tread or a landing
               above or below it.

               26. Reflectance

               Measure of light reflected in a given direction by a surface and which is expressed in a
               unit term from 0 to 100 scale, respectively, that represents a grey scale progression
               from the notional extremes of total light absorption (black) to total light reflection (white).


               27. Service animal


               Any guide dog, signal dog, or other animal individually trained to work or perform tasks
               for an individual with a disability, including, but not limited to, guiding individuals with
               impaired vision, alerting individuals with impaired hearing to intruders or sounds,
               providing minimal protection or rescue work, pulling a wheelchair, or fetching dropped
               items. Service animals shall be identified with a certification.


               28. Shall

               It is mandatory to do it.


               29. Should

               It is recommended to do it.


               30. Visual contrast

               Visual perception between one element of a building and another







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