A stair string cut to the tread and riser steps, with a throat of solid material under the inside corner of each cut.
Category: Stairs › Staircases › Stair Flights
By Huu Khanh Nguyen · Updated November 14, 2026
| Name | Default | Unit |
|---|---|---|
| Number of risers (the flight has risers - 1 treads) | 13 | |
| Riser height | 175 | mm |
| Going, nosing to nosing | 250 | mm |
| Nosing overhang of the treads beyond the riser line (y) | 25 | mm |
| Tread thickness (z) | 40 | mm |
| String thickness across the width (x) | 44 | mm |
| Throat: string material under the inside corner of each cut, across the pitch | 127 | mm |