Stairs by floor height · 3.05 m · L-shaped, winders
L-shaped stairs with winders for a 3.05 m floor height
17 risers of 17.9 cm and 16 treads 27 cm deep, at 34°. 1.00 m wide, it takes 2.89 m × 2.62 m of floor. Three winders carry it round the corner, each taking a riser, so it needs no landing.
Open this stair in uCADWhat it’s made of
More or fewer steps
3.05 m (305 cm) can be climbed in fewer, higher steps or more, lower ones. Each opens in uCAD as this stair with that many risers.
| Risers | Each riser | Going | Pitch | Run of a straight flight | How it walks | In uCAD |
|---|---|---|---|---|---|---|
| 15 | 20.3 cm | 25 cm | 39° | 3.50 m | steep: over 20 cm, more than many codes allow | open |
| 16 | 19.1 cm | 25 cm | 37° | 3.75 m | steeper, fewer steps | open |
| 17 | 17.9 cm | 27 cm | 34° | 4.32 m | comfortable (drawn here) | open |
| 18 | 16.9 cm | 29 cm | 30° | 4.93 m | comfortable | open |
Limits differ by country: England’s Approved Document K allows a rise up to 220 mm and a pitch up to 42° in a home, Germany’s DIN 18065 up to 200 mm, and both ask for 2.0 m of headroom. Check the code that applies to yours.
What it’s made of
Drawn as it’s built, in timber with open treads: treads housed in the stringers, posts under the turns, a railing on its newels. 221 parts in all, every bolt and weld among them. Sizes in millimetres, length × width × thickness.
| Part | Qty | Length | Width | Thickness |
|---|---|---|---|---|
| stringer (shaped) | 1 | 3491 | 441 | 50 |
| stringer (shaped) | 1 | 3146 | 442 | 50 |
| tread (shaped) | 1 | 1180 | 582 | 40 |
| tread (shaped) | 1 | 1195 | 572 | 40 |
| tread (shaped) | 1 | 1346 | 507 | 40 |
| stringer (shaped) | 1 | 2276 | 263 | 50 |
| stringer (shaped) | 1 | 1941 | 263 | 50 |
| tread | 13 | 1030 | 295 | 40 |
| post, timber 90x90 | 1 | 2786 | 90 | 90 |
| post, timber 90x90 | 1 | 1832 | 90 | 90 |
| post, timber 90x90 | 1 | 1379 | 90 | 90 |
| post, timber 90x90 | 1 | 1198 | 90 | 90 |
| handrail, round 50 mm (shaped) | 1 | 2149 | 49 | 49 |
| handrail, round 50 mm (shaped) | 1 | 1825 | 49 | 49 |
| baluster, steel square bar 18 mm (shaped) | 24 | 847 | 18 | 18 |
Fixings: 3 × tie rod M10x1127, 43 × washer M10, 32 × nut M10, 24 × stud M8x80, glued, 24 × screw 5x45, 3 × bracket, concealed post base 90, 8 × anchor bolt M10x100, 6 × stud M10x117, 2 × anchor bolt M10x200, 2 × bracket, steel angle 100x100x8, 2 × stud M10x85, 11 × bolt M10x170, 11 × nut M10, barrel.
Closed risers, a steel frame, another width or railing: change it in uCAD, and the parts are worked out again, with a cut list of the boards to buy. Sizes of the structure are the library’s defaults for a house stair, not an engineer’s calculation for yours.
Another height or width
Will it fit your room?
Open it in uCAD, draw your walls round it and look: turn it the other way, move the turn up or down, change the width. Or tell the AI: “a stair for 3.05 m in a 2 × 3 m stairwell”, and it draws one that fits.
Same height: Straight · L-shaped, landing · U-shaped, landing · U-shaped, winders · Spiral · Square spiral
This stair for 3.00 m · 3.10 m · all heights