Part K protection from falling collision and impact

Part K for Risk Management Surveyors

 

Risers, Goings and stair construction

  • Riser = vertical part of step, going = horizontal part of step
  • Maximum pitch of stairs is to be 42 degrees
  • For a private stairs risers should be 150-220mm
  • For a private stairs, goings should be 220-300mm
  • Relationship between (2R+G ) – 550mm 700mm
  • Open risers can only be used in dwellings
  • Where using Open risers 100mm sphere gap max & overlap treads by 16mm minimum
  • In common areas of flats treads should have contrast nosing 50-65mm wide on tread

 

Headroom for stairs

  • All means of escape routes should have a minimum clear headroom of 2m except in doorways
  • Measure from the lowest point of the bulkhead and from the pitch line of the stairs
  • You can have reduced head room to 1.8m for loft conversions

Width of stairs & Landings

  • For commercial units the stairs should be split if more than 2m wide into 1m wide
  • No minimum width for private stairs & 30degree change of direction if >36 flights
  • A door can swing across a landing but has to leave a 400mm gap between stair & door
  • For tapered stairs minimum tread width 50mm at narrow end

 

Handrails for stairs

  • Handrail to be 900-1000mm from stair pitch line
  • If stairs are 1000mm or wider handrails to be provided on both sides
  • In buildings other than dwellings and common areas for flats, handrail needed for each side of flights and landings; continuous handrail along the flights and landings
  • Other than dwellings; handrails should not project into access route and ensure handrail contrasts visually with background
  • Handrail to be slip resistant, and turned down to stop clothes snagging

 

Guarding for stairs

  • 100mm sphere
  • Shouldn’t be climbable for children
  • Common areas guarding needed where there are 2+ risers
  • In dwellings, provide guarding where there is a drop of 600mm plus

 

Ramps

 

  • Ramps should be apparent and signed
  • Minimum 1:12 maximum 1:20, see table in K1:2 for goings and risers

Guarding

  • Dwellings – Internal 900mm minimum height & external 1100mm
  • Glazing – Window openings guarding height 8oomm min

 

Protection against impact with glazing – Critical areas

  • 800mm in windows and side panels
  • 1500mm in doors
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