Page 24 - Dubai Universal Design Code

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

23