This standard BS 5395-4:2011 Code of practice for the design of stairs for limited access is classified in these ICS categories:
91.060.30 Ceilings. Floors. Stairs
This part of BS 5395 gives recommendations for the design of stairs suitable for use in limited access situations for dwellings only. Such stairs include straight, spiral and alternating tread stair designs.
Limited access for industrial settings is covered in BS EN ISO 14122, BS 5395‑33) and BS 4211. These standards apply to all limited access situations for non-domestic buildings.