Appendix A: Key terms

  1. Key terms

    Key terms

    The following are key terms used in this document: Accessible entrance An entrance which is accessible to people regardless of disability, age or gender. Alternating tread stair A stair with paddle-shaped treads where the wide portion is on alternate sides on consecutive treads (see paragraphs 1.29 and 1.30). Barrier A structure – either a raised rail or a solid wall – that denies access to another area. Common stair Serving more than one dwelling. Contrast visually The perception of a visual difference between two elements of the building, or fittings within the building, so that the difference in light reflectance value is of sufficient points to distinguish between the two elements. Flight A continuous series of steps or a continuous slope (ramp) between landings. (For the widths and lengths of flights see paragraphs 1.14–1.24.) General access stair A stair intended for all users of a building on a day-to-day basis, as a normal route between levels. Going For stairs: the depth from front to back of a tread, less any overlap with the next tread above (see paragraphs 1.2 and 1.3). (For the measurement of the going on tapered treads see paragraphs 1.25– 1.27.) For ramps: the length of the ramp between landings. Guarding A barrier that denies pedestrians or vehicles access to another area, for example the floor below (see Diagrams 3.1 and 3.2). Handrail A rail, at hand height or a little higher, for people to hold for support. (For handrails for stairs, see paragraphs 1.34–1.37; for handrails for ramps, see paragraphs 2.11–2.12.) Helical stair A stair in a helix around a central void (see paragraph 1.28). Ladder A means of access to another level, formed by a series of rungs or narrow treads. People normally ascend or descend facing the ladder. (See paragraphs 1.31–1.33.) Light reflectance value (LRV) The total quantity of visible light reflected by a surface at all wavelengths and directions when illuminated by a light source. Nosing The leading edge of a stair tread. Pitch The angle of inclination (slope) between the horizontal and a line connecting the nosings of a stair. Private stair A stair intended to be used for only one dwelling. Principal entrance An entrance which a visitor not familiar with the building would normally expect to approach. Radial gangway A gangway at an angle to the rows of seats/wheelchair spaces or a stepped gangway in tiered seating. Ramp A slope steeper than 1:20, on which a pedestrian or wheelchair user can move from one level to another (see Section 2). Rise The height between consecutive treads (see paragraphs 1.2 and 1.3). For ramps: the vertical distance between each end of the ramp flight. Spiral stair A stair in a helix around a central column (see paragraph 1.28). Stair width The clear width between the walls or balustrades. Tapered tread A step in which the going reduces from one side to the other (see paragraphs 1.25–1.27). Transverse gangway A flat gangway parallel to the rows of seating/wheelchair spaces. Utility stair A stair used for escape, access for maintenance, or purposes other than as the usual route for moving between levels on a day-to-day basis. Vomitory exits Storey exits provided within the body of a seating layout.

    • Diagram 1.1 Measuring rise and going Part K Diagram 1.1 Measuring rise and going Part K (Risers and Goings)
    • [caption id="attachment_8489" align="alignnone" width="935"]Diagram 1.2 Examples of suitable tread profiles Diagram 1.2 Examples of suitable tread profiles Part K

    • Diagram 1.3 Minimum headroom Part K Diagram 1.3 Minimum headroom Part K
    • Diagram 1.4 reduced headroom for loft conversions Part K Diagram 1.4 reduced headroom for loft conversions Part K
    • Diagram 1.5 dividing flights Part K Diagram 1.5 dividing flights Part K
    • Diagram 1.6 Change of direction in flights Part K Diagram 1.6 Change of direction in flights Part K
    • Diagram 1.7 Cupboard onto landing Part K Diagram 1.7 Cupboard onto landing Part K
    • Diagram 1.8 Landings next to doors in dwellings Part K Diagram 1.8 Landings next to doors in dwellings Part K
    • Diagram 1.9 Measuring tapered treads Part K Diagram 1.9 Measuring tapered treads Part K
    • Diagram 1.10 Alternating tread stair Part K Diagram 1.10 Alternating tread stair Part K
    • Diagram 1.11 Key dimensions for handrails for common stairs in blocks of flats Part K Diagram 1.11 Key dimensions for handrails for common stairs in blocks of flats Part K
    • Diagram 1.12 Key dimensions for handrails for stairs in buildings other than dwellings Part K Diagram 1.12 Key dimensions for handrails for stairs in buildings other than dwellings Part K
    • Diagram 1.13 Handrail design Part K Diagram 1.13 Handrail design Part K
    • Diagram 2.1 Relationship of ramp gradient to the going of a flight Part K Diagram 2.1 Relationship of ramp gradient to the going of a flight Part K
    • Diagram 2.2 ramp design Part K Diagram 2.2 ramp design Part K
    • Diagram 3.1 Guarding design Diagram 3.1 Guarding design
    • Diagram 3.2 Typical Locations for guarding Part K Diagram 3.2 Typical Locations for guarding Part K
    • Diagram 4.1 Barrier siting Part K Diagram 4.1 Barrier siting Part K
    • Diagram 4.2 barrier design Part K Diagram 4.2 barrier design Part K
    • Diagram 4.3 Loading bay Part K Diagram 4.3 Loading bay Part K
    • Diagram 5.1 Critical glazing locations in internal and external walls Part K Diagram 5.1 Critical glazing locations in internal and external walls Part K
    • Diagram 5.2 Annealed glass thickness and dimension limits Diagram 5.2 Annealed glass thickness and dimension limits Part K
    • Diagram 5.4 Permanent screen protection Part K Diagram 5.4 Permanent screen protection Part K
    • Diagram 6.1 Marking by a barrier Part K Diagram 6.1 Marking by a barrier Part K
    • Diagram 6.2 Marking by a surface Part K Diagram 6.2 Marking by a surface Part K
    • Diagram 7.1 Examples of door height glazing not warranting manifestation Part K Diagram 7.1 Examples of door height glazing not warranting manifestation Part K
    • [caption id="attachment_8468" align="alignnone" width="933"]Diagram 7.2 Height of manifestation for glass doors and glazed screens Part K Diagram 7.2 Height of manifestation for glass doors and glazed screens Part K[/caption]

    • Diagram 8.1 Height of controls Part K Diagram 8.1 Height of controls Part K
    • Diagram 9.1 Safe reaches for cleaning Part K Diagram 9.1 Safe reaches for cleaning Part K
    • Diagram 9.2 Ladders a maximum of 6m long Part K Diagram 9.2 Ladders a maximum of 6m long Part K
    • Diagram 9.3 Ladders a maximum of 9m long Diagram 9.3 Ladders a maximum of 9m long
    • Diagram 10.1 Visibility requirements of doors Part K Diagram 10.1 Visibility requirements of doors Part K
    • Diagram 10.2 Avoiding doors on acces routes Part K Diagram 10.2 Avoiding doors on access routes Part K
    • Table 1.1 Rise and Going Part K Table 1.1 Rise and Going Part K risers and goings