By Huu Khanh Nguyen · Updated October 29, 2026 · stair, radius-block, precast, curved
A stair of solid precast blocks cut to a radius, turning on an arc from a quarter turn to a full turn and a half, with an optional landing at the top. Step height, width and turn Well radius and hand Block overlap and joint Concrete or white finish
| Name | Default | Unit |
|---|---|---|
| Riser height | 150 | mm |
| Radius of the inner edge of the flight in plan (the well) | 1000 | mm |
| Radial width of the flight, the block length | 1000 | mm |
| Total turn of the flight in plan | 180 | ° |
| Direction of climb seen from above | left | |
| Number of risers in the flight (the flight has risers - 1 blocks, the upper level is the landing) | 21 | |
| Underlap, the rear part of a block that lies under the next block, measured on the middle radius | 70 | mm |
| Bed joint between a block and the block below it (z): block height = rise - joint | 10 | mm |
| Finish | white | |
| Straight landing at the upper level | true | |
| Landing depth along the direction of travel at the end of the flight | 1219 | mm |
| Landing thickness | 147 | mm |
| Radius of the walking line (readout) | innerRadius + Math.min(width / 2, 500) | mm |
| Turn of one step (readout) | angle / (risers - 1) | ° |
| Floor to floor height (readout) | rise * risers | mm |