By Huu Khanh Nguyen · Updated October 27, 2026 · stair, tread
A folded steel plate stair tread with returns on all four edges, left open or filled with concrete or timber.
| Name | Default | Unit |
|---|---|---|
| Width across the flight (x) | 1000 | mm |
| Going, nosing to nosing (y); the tread is going + overhang deep | 250 | mm |
| Thickness (z, from the top surface down) | 50 | mm |
| Nosing overhang beyond the riser line (y) | 10 | mm |
| Sheet thickness | 3.2 | mm |
| Fill | none | |
| Finish | white |