Minimum height and strength of guarding

Table 5.1 Minimum height and strength of guarding Location of guarding | Minimum height+ (mm) | Minimum horizontal force/metre run (kN/m) Dwellings: (a) guarding a flight, ramp, landing or floor within a dwelling | 900* | 0.36 (b) guarding an external flight or ramp | 900 | 0.74 (c) guarding a level for the purpose of maintenance | 1100 | 0.36 (d) guarding not described in (a) to (c) | 1100 | 0.74 Retail buildings: (a) guarding a flight or ramp | 900 | 1.50 (b) guarding a level for the purpose of maintenance | 1100 | 0.36 (c) guarding not described in (a) or (b) | 1100* | 1.50 Other buildings: (a) guarding a flight or ramp where crowd loading will not occur | 900 | 0.74 (b) guarding a flight or ramp where crowd loading† will occur | 900 | 3.00 (c) guarding not described in (b) where crowd loading† will occur | 1100* | 3.00 (d) guarding a floor immediately in front of fixed seating | 800 | 1.50 (e) guarding a level for the purpose of maintenance | 1100 | 0.36 (f) guarding not described in (a) to (e) | 1100* | 0.74 Notes: + In the case of a flight or ramp the height should be measured from the pitch line of a flight or the surface of a ramp. * This may be reduced to 800 mm at openable windows or glazing at changes of level. The glazing may be designed to act as guarding, in which case separate guarding would not be required. In a roofspace conversion to a dwelling, a roof window (rooflight) that is required to comply with Part E may have this height reduced to 600 mm. † Crowd loading will occur in parts of buildings where people assemble in large numbers such as theatres, discotheques, cinemas, sports halls, assembly halls, shopping malls and similar areas.