Protection from falling, collision and impact: Approved Document K

O N L I N E V E R S I O N A Appendix A Appendix A: Key terms The following are key terms used in this document: Accessible entrance Guarding An entrance which is accessible to people A barrier that denies pedestrians or vehicles access regardless of disability, age or gender. to another area, for example the floor below (see Diagrams 3.1 and 3.2). Alternating tread stair A stair with paddle-shaped treads where the wide Handrail portion is on alternate sides on consecutive treads A rail, at hand height or a little higher, for people (see paragraphs 1.29 and 1.30). to hold for support. (For handrails for stairs, see paragraphs 1.34–1.37; for handrails for ramps, see Barrier paragraphs 2.11–2.12.) A structure – either a raised rail or a solid wall – that denies access to another area. Helical stair A stair in a helix around a central void (see Common stair paragraph 1.28). Serving more than one dwelling. Ladder Contrast visually A means of access to another level, formed The perception of a visual difference between by a series of rungs or narrow treads. People two elements of the building, or fittings within the normally ascend or descend facing the ladder. (See building, so that the difference in light reflectance paragraphs 1.31–1.33.) value is of sufficient points to distinguish between the two elements. Light reflectance value (LRV) The total quantity of visible light reflected by a Flight surface at all wavelengths and directions when A continuous series of steps or a continuous slope illuminated by a light source. (ramp) between landings. (For the widths and lengths of flights see paragraphs 1.14–1.24.) Nosing The leading edge of a stair tread. General access stair A stair intended for all users of a building on a Pitch day-to-day basis, as a normal route between The angle of inclination (slope) between the levels. horizontal and a line connecting the nosings of a stair. Going For stairs: the depth from front to back of a tread, Private stair less any overlap with the next tread above (see A stair intended to be used for only one dwelling. paragraphs 1.2 and 1.3). (For the measurement of Principal entrance the going on tapered treads see paragraphs 1.25– An entrance which a visitor not familiar with the 1.27.) building would normally expect to approach. For ramps: the length of the ramp between Radial gangway landings. A gangway at an angle to the rows of seats/ wheelchair spaces or a stepped gangway in tiered seating. Building Regulations 2010 AAAApppppppprrrroooovvvveeeedddd DDDDooooccccuuuument K, 2013 edition 51 OOO NNN LLL III NNN EEE VVV EEE RRR SSS III OOO NNN