| Primary value | 1:20 (5%) |
| Applies to | New public building entries · Hospital ramps · Long ramps (>3 m rise) |
| Exceptions | Maximum allowed → 1:12 |
| Measured as | Vertical rise per horizontal run. |
| Source | IS 4963 — Section 5 📚 Cross-referenced |
1:20 is comfortable for both wheelchair users and elderly/infirm pedestrians. It's the gold-standard slope when space permits and is required for very long ramps where 1:12 would be exhausting.
Hospitals, museums, and government buildings increasingly target 1:20 for the entry ramp. Requires more horizontal length but gives a much better user experience.