Document H covers: Stairs, ramps, guarding and protection from impact

• 2 Visual contrast – A difference in LRV of 30 points or more allows a degree of variability that is required to provide reasonable visual contrast.
• 15 A common stair in a block of dwellings should have steps with rises that are not open, step nosings which are distinguishable, through permanent contrasting brightness and have a suitable profile such that the risk of tripping is reduced. See Diagram 3.9 (b).
• 33 So a visually impaired person can appreciate the extent of the stair and identify individual treads, steps should have step nosings which are distinguishable through suitable permanent visual contrast. The width of this permanent visual contrast should be not less than 50 mm and not more than 60 mm to all treads and risers.
• 34 Anything fixed or fitted to a tread or riser should not create a trip hazard.
• 35 Steps should have rises that are not open and have a suitable profile such that the risk of tripping or people catching their feet beneath the nosing, is reduced (see Diagram 3.9).

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