ONLINE VERSIONONLINE VERSIONSTAIRS AND LADDERSSTAIRS AND LADDERSSTAIRS AND LADDERS K1Headroom 1.12 A stair in a public building which is wider than 1800mm should be divided into flights 1.10 A headroom of 2m is adequate on the which are not wider than 1800mm as shown access between levels (see Diagram 2). For loft in Diagram 4.conversions where there is not enough space to achieve this height, the headroom will be satisfactory if the height measured at the centre of the stair width is 1.9m reducing to 1.8m at the Diagram 4 Dividing flightsside of the stair as shown in Diagram 3.See para 1.12Diagram 2 Measuring headroomSee para 1.10Length of flights1.13 The number of risers in a flight should be limited to 16 if a stair serves an area used as a shop or for assembly purposes.For gangways of shallow pitch that are used in Diagram 3 Reduced headroom forassembly buildings reference should be made loft conversionsto BS 5588-6:1991 and to the Guide to Safety in Sports Grounds and Guide to Fire Precautions in See para 1.10Existing Places of Entertainment and Like Premises.1.14 Stairs having more than 36 risers in consecutive flights should make at least one change of direction between flights of at least 30º (see Diagram 5).Diagram 5 Change of directionSee para 1.14Width of flights1.11 No recommendations for minimum stair Landingswidths are given. Designers should bear in mind 1.15 Landings should be provided at the top the requirements for stairs which:and bottom of every flight. The width and length a. form part of means of escape. Reference of every landing should be at least as great as should be made to Approved Document B: the smallest width of the flight. The landing may Fire safety;include part of the floor of the building.b. provide access for disabled people. 1.16 To afford safe passage landings shouldReference should be made to Approved be clear of permanent obstruction. A door may Document M: Access and facilities for swing across a landing at the bottom of a flight disabled people.but only if it will leave a clear space of at least 400mm across the full width of the flight (see Approved Document K Stairs, ladders and ramps7ONLINE VERSION