Protection from falling, collision and impact: Approved Document K

O N L I N E V E R S I O N K1 Stairs and ladders Section 1: Stairs and ladders Scope 1.1 The guidance provided in this document covers internal and external steps and stairs when they are part of the building. Additional guidance is provided in Approved Document M when external stepped access also forms part of the principal entrances and alternative accessible entrances, and when they form part of the access route to the building from the boundary of the site and car parking. See Approved Document M Section 1 (for buildings other than dwellings) and Section 6 (for dwellings). Steepness of stairs – rise and going 1.2 Measure the rise and going as shown in Diagram 1.1. (For steps with tapered treads, see also paragraphs 1.25–1.27.) See paras 1.2–1.3 Going Open riser Nosing Open riser Top surface of tread treads should DWELLINGS overlap at Top surface of tread Rise least 16mm Riser Going dimensions to be measured Pitch from nosing to nosing Going Note: Two examples of tread profiles have been shown together for illustrative purposes only Nosing Top surface of tread Treads should overlap no more than Max 25mm overlap Rise BUILDINGS 25mm OTHER THAN DWELLINGS Top surface of tread (For tread profiles see Going dimensions Diagram 1.2) to be measured Going Pitch from nosing to nosing Note: Four examples of tread profiles have been shown together for illustrative purposes only Diagram 1.1 Measuring rise and going 4 Approved Documentttt KKKK,,,, 2222000011113333 eeeeddddiiiittttiiiioooonnnn Building Regulations 2010 OOO NNN LLL III NNN EEE VVV EEE RRR SSS III OOO NNN