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Staircase Building Regulations - General Information

The Staircase in your building project will need to conform to Building Regulations. Building regulations relate to the shape, depth, height and level of your staircase as well as the pitch, the clearance above it and the width of the landings. Details of permitted handrails and balustrades as well as their related heights and the distance between the balusters are also covered. The building regulations issues can be explored on the excellent government website www.planningportal.gov.uk. You may also Click here to download 'Approved Document K - Protection from falling, collision and impact' in Pdf. format direct from the building regulations website.

These building regulations will dictate to a greater or lesser extent what you can achieve with your staircase design.

The main points to note regarding building regulations for a staircase from this document are:
Part K Building Regulations 
  • The minimum tread size (the horizontal part of each stair) is 220mm from the nosing to the nosing of the next tread and the riser (the height of each step) must be between 190mm and 220mm.
  • There are no recommendations for minimum staircase widths, the width of a standard flight of a staircase is 860mm and anything less than 600mm is impractical. The gradient (pitch can not be greater than 42 degrees).
  • A staircase with open risers likely to be used by children under five should be built so that a 100mm sphere cannot pass through the open risers. The same regulation applies to the balusters - described in the regulations as the 'guarding'.
  • Staircase Landings should generally by provided at the top of each flight.
Clear headroom of 2000mm should be provided over the whole width of your staircase but this can be reduced to 1900mm in some situations for loft conversions.
Please consult with our Technical Department for further advice on all aspects of Staircase Building Regulations. We strongly recommend that all customers liaise with their local authority Building Control department or District Surveyor to ascertain the exact requirement for your staircase and conformation to building regulations.

In addition to this, parts B (Means of Escape) and M (Access for Disabled) of Building Regulations also apply to spiral stairs in certain situations.

Building Regulations and British Standards for a Spiral Staircase

Further to paragraph 1.21 of Part K of the building regulations states that a spiral staircase and helical staircase complies with Building Regulations if it is designed to comply with British Standard BS5395 part II (Code of practice for the design of helical staircases and spiral staircases 1984). Click here for further information on British Standard BS5395 part II
Please note; The Buyer is responsible for ensuring that the staircase is assembled and installed in accordance with the manufacturer’s instructions, and that the installation complies with relevant Building Regulations and Planning Laws.

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