Appendix A: Key terms

  1. The following are key terms used in this document:

    The following are key terms used in this document:

    Note: Terms shown with * are defined in legislation, either in the Building Act 1984 or the Building Regulations 2010, where the definition may be fuller than the definition given here. Accessible threshold A threshold that is level or, if raised, has a total height of not more than 15mm, a minimum number of upstands and slopes and with any upstands higher than 5mm chamfered. Other acceptable solutions are described in Accessible thresholds in new housing – Guidance for house builders and developers, The Stationery Office Ltd. ISBN 0 11 702333 3. 1999. Approach route Internal or external path or corridor usually leading to the principal private entrance of a dwelling from a defined starting point (typically the pavement immediately outside of the curtilage or plot boundary). Bedspace A suitable sleeping area for one person. (A single bedroom provides one bedspace and a double or twin bedroom provides two bedspaces where these rooms also meet any other requirements for the relevant category of dwelling). Clear access route Clear, unobstructed ‘pathway’ to access a window or other feature. Localised obstructions are not permitted unless specifically stated. Clear access zone Clear, unobstructed space for access or manoeuvring. Localised obstructions are not permitted unless specifically stated. Clear opening width Clear distance measured between the inside face of the doorframe (or door stop) and the face of the door when open at 90 degrees. Door furniture and ironmongery may be disregarded when measuring the clear opening width. Clear turning circle Clear floor space, represented by a circle, or an ellipse, that allows a wheelchair user to turn independently in a single movement. A door swing is permitted within a clear turning space unless stated otherwise. Clear width Clear distance measured between walls or other fixed obstructions (except permitted localised obstructions) or across a path. Skirtings totalling up to 50mm total thickness and shallow projecting ducts or casings above 1800mm may be discounted when measuring clear width. Communal or common (area, facilities or entrances) Shared area accessed by, or intended for the use of, more than one dwelling. Dwelling* A house or flat. Student accommodation is treated as hotel/motel accommodation. Entrance storey The floor level (of the dwelling) on which the principal private entrance is located. Flat* Separate and self-contained premises constructed or adapted for residential purposes and forming part of a building from which it is divided horizontally. Following edge (of door) The surface of a door which follows into (or faces away from) the room or space into which the door is being opened – sometimes referred to as ‘the push side’. Gently sloping Gradient between 1:60 and 1:20 Habitable room A room used, or intended to be used, for dwelling purposes, including a kitchen but not a bathroom or utility room. Installed level access shower Step-free area with no lips or upstands, suitable for showering, with a floor laid to shallow falls towards a floor gulley connected to the drainage system. Leading edge (of door) The surface of a door which leads into (or faces) the room or space into which the door is being opened – sometimes referred to as ‘the pull side’. Level Gradient not exceeding 1:60 Liftway Vertical route linking all floors of a dwelling accommodating (or capable of accommodating) a lift or lifting platform. Localised obstruction Short, fixed element, such as a bollard lighting column or radiator, not more than 150mm deep that may intrude into a path, route, or corridor, that does not unduly restrict the passage of a wheelchair user. Manoeuvring space Clear floor space, represented by a rectangle which allows a wheelchair user to turn independently in a series of manoeuvres. A door swing is permitted within a clear manoeuvring space unless stated otherwise Pitch Line A line that connects the nosing of the treads of a stair. Plot gradient The gradient measured between the entrance storey finished floor level of the dwelling and the point of access. Point of access The point at which a person visiting a dwelling would normally get out of a car before approaching the dwelling. The point of access may be within or outside the plot. Potential level access shower Space capable of providing a level access shower without the need to move walls, remove screed or other solid flooring. It should include a capped- off floor gulley, set at an appropriate level and connected to the drainage system. (Usually provided within a wet room). Principal communal entrance The communal entrance (to the core of the building containing the dwelling) which a visitor not familiar with the building would normally expect to approach (usually the common entrance to the core of a block of flats). Principal private entrance The entrance to the individual dwelling that a visitor not familiar with the dwelling would normally approach (usually the ‘front door’ to a house or ground floor flat). Principal storey The floor level (of the dwelling) on which the main living space is located, where this is not the entrance storey. Private (area, facilities or entrances) Area belonging to an individual dwelling. Ramped Gradient between 1:20 and 1:12 Standard parking bay A parking bay 2.4m wide x 4.8m long Steeply sloping plot A plot where the gradient exceeds 1:15. Step-free Route without steps but that may include a ramp or a lift suitable for a wheelchair user. Suitable ground surface External ground surface that is firm, even, smooth enough to be wheeled over, is not covered with loose laid materials such as gravel and shingle, and has a maximum crossfall of 1:40. Suitable tread nosings Nosings that conform with one of the options shown in Diagram 1.2 of Approved Document K. Wheelchair accessible Category 3 dwelling constructed to be suitable for immediate occupation by a wheelchair user where the planning authority specifies that optional requirement M4(3)(2)(b) applies. Wheelchair adaptable Category 3 dwelling constructed with the potential to be adapted for occupation by a wheelchair user where optional requirement M4(3)(2)(a) applies. Wet room WC or bathroom compartment with tanking and drainage laid to fall to a connected gulley capable of draining the floor area when used as a shower.

    • [caption id="attachment_6579" align="alignnone" width="660"]1.1Measurement of clear opening width of external and internal doors Diagram 1.1 Measurement of clear opening width of external and internal doors[/caption]

    • 1.2 Minimum door width, hall widths and localised obstructions Diagram 1.2 Minimum door width, hall widths and localised obstructions.
    • 1.3 WC access zones Diagram 1.3 WC access zones.
    • 1.4 Exmples of WC/cloakroom Diagram 1.4 Exmples of WC/cloakroom
    • 1.5 Heights of switches, sockets etc Diagram 1.5 Heights of switches, sockets etc.
    • 2.1 Maximum length of ramp at a given gradient Diagram 2.1 Maximum length of ramp at a given gradient.
    • 2.2 Measurement of clear opening width and other features of external and internal doors Diagram 2.2 Measurement of clear opening width and other features of external and internal doors.
    • 2.3 Minimum door and hall widths and restrictions on localised obstructions Diagram 2.3 Minimum door and hall widths and restrictions on localised obstructions.
    • 2.4 Clear access zones to principal bedroom Diagram 2.4 Clear access zones to principal bedroom.
    • 2.5 Sanitary fittings, associated clear access zones and permitted encroachment of basins Diagram 2.5 Sanitary fittings, associated clear access zones and permitted encroachment of basins.
    • 2.6 Examples of WC-cloakroom layouts Diagram 2.6 Examples of WC/cloakroom layouts.
    • 2.7 Examples of Category 2 bathrooms Diagram 2.7 Examples of Category 2 bathrooms.
    • 3.1 Maximum length of ramp at a given gradient Diagram 3.1 Maximum length of ramp at a given gradient
    • 3.2 Measurement of clear opening width and other features of external and internal doors Diagram 3.2 Measurement of clear opening width and other features of external and internal doors
    • 3.3 Features associated with principal private entrance Diagram 3.3 Features associated with principal private entrance.
    • 3.4 Minimum door and hall widths and restrictions on localised obstructions Diagram 3.4 Minimum door and hall widths and restrictions on localised obstructions
    • 3.5 Outward opening doors in a corner Diagram 3.5 Outward opening doors in a corner
    • 3.6 Wheelchair storage and transfer space Diagram 3.6 Wheelchair storage and transfer space
    • 3.7 Access to through floor lift Diagram 3.7 Access to through floor lift
    • 3.8 Example of wheelchair accessible kitchen layout Diagram 3.8 Example of wheelchair accessible kitchen layout
    • 3.9 Clear access zones and manoeuvering spaces to principal bedroom Diagram 3.9 Clear access zones and manoeuvering spaces to principal bedroom
    • 3.10 Sanitary fittings associated clear access zones and permitted encroachment of basins – wheelchair adaptable Diagram 3.10 Sanitary fittings associated clear access zones and permitted encroachment of basins – wheelchair adaptable
    • 3.11 Sanitary fittings, associated clear access zones and permitted encroachment of basins – wheelchair accessible Diagram 3.11 Sanitary fittings, associated clear access zones and permitted encroachment of basins – wheelchair accessible
    • 3.12 Example of wheelchair adaptable WC/cloakroom layout with potential to be wheelchair accessible Diagram 3.12 Example of wheelchair adaptable WC/cloakroom layout with potential to be wheelchair accessible
    • 3.13 Sanitary fittings associated access zones and permitted encroachment of basis for second WC/cloakroom where on same floor level as first WC Diagram 3.13 Sanitary fittings associated access zones and permitted encroachment of basis for second WC/cloakroom where on same floor level as first WC
    • 3.14 Examples of compliant second WC cloakrooms where on the same floor level asthe first WC Diagram 3.14 Examples of compliant second WC/cloakrooms where on the same floor level as the first WC
    • 3.15 Examples of wheelchair adaptable bathroom layouts with potential to be wheelchair accessible Diagram 3.15 Examples of wheelchair adaptable bathroom layouts with potential to be wheelchair accessible
    • 3.16 Examples of wheelchair accessible bathrooms Diagram 3.16 Examples of wheelchair accessible bathrooms
    • 3.17 Examples of wheelchair accessible bathrooms with both bath and shower Diagram 3.17 Examples of wheelchair accessible bathrooms with both bath and shower
    • Table 1.1 Minimum widths of corridors and passageways for a range of doorway widths Table 1.1 Minimum widths of corridors and passageways for a range of doorway widths
    • Table 2.1 Minimum widths of corridors and passageways for a range of doorway widths Table 2.1 Minimum widths of corridors and passageways for a range of doorway widths.
    • Table 3.1 Minimum area of general built-in-storage Table 3.1 Minimum area of general built-in-storage
    • Table 3.2 Minimum combined floor area for living, dining and kitchen space Table 3.2 Minimum combined floor area for living, dining and kitchen space
    • Table 3.3 Min length of kitchen worktop Table 3.3 Min length of kitchen worktop
    • Table 3.4  Minimum length of kitchen worktop, including fittings and appliances, to be fitted at completion for a wheelchair accessible dwelling Table 3.4 Minimum length of kitchen worktop, including fittings and appliances, to be fitted at completion for a wheelchair accessible dwelling
    • Table 3.5 Summary of minimum requirements for sanitary provision in typical dwelling types Table 3.5 Summary of minimum requirements for sanitary provision in typical dwelling types
    • Appendix D Furniture schedule Appendix D Furniture schedule