Metric Stair Layout Calculator
Based on the search results, I’ve compiled a table with key metric unit measurements for stairs in the UK. This table covers the essential information you need to know about stair dimensions according to UK building regulations.
| Measurement | Domestic (Private) Stairs | Public/Utility Stairs |
|---|---|---|
| Maximum Rise | 220mm | 190mm |
| Minimum Going | 220mm (225mm in Scotland) | 250mm |
| Maximum Pitch | 42° | 33° |
| Minimum Headroom | 2000mm | 2000mm |
| Handrail Height | 900-1000mm | 900-1000mm |
| Minimum Stair Width | No specific requirement (860mm recommended) | No specific requirement (1000mm+ common) |
| Maximum Number of Steps | 16 (before a landing is required) | Varies (consult local regulations) |
| Minimum Landing Width | Equal to stair width | Equal to stair width |
| Nosing Overlap | Minimum 16mm (15mm in Scotland) | Flush nosing recommended |
| Balustrade Gap | Maximum 100mm | Maximum 100mm |
| Rise + Going Formula | 2R + G = 550-700mm | 2R + G = 550-700mm |
Additional notes:
- All risers in a flight must be equal.
- All treads in a flight must be level.
- Open risers should not allow a 100mm sphere to pass through.
- Stairs wider than 1000mm require handrails on both sides.
- Spiral staircases have different requirements and should be consulted separately.
- Always check with local building authorities as regulations may vary slightly by region.
This table provides a comprehensive overview of the key measurements for stair design in the UK. However, it’s always recommended to consult with a professional or local building authority for specific projects, as there may be additional considerations or variations depending on the particular circumstances of the building.