DASLab / 12
Stair & Ramp
Riser/tread by the Blondel rule, stair geometry, ramp slopes and accessibility checks.
Experimental tool — evolving and open to suggestions: info@derzawi.com
Recommended
15 × 200 mm risers · 230 mm going
2R + G = 630 mm · pitch 41° · 1 flight · total going 3.22 m · footprint ≈ 3.22 × 1 m
Options
| Risers | Riser | Going | 2R + G | Pitch | Flights | Check |
|---|---|---|---|---|---|---|
| 14 | 214.3 | 220 | 649 | 44.2° | 1 | pitch > 42° |
| 15 | 200 | 230 | 630 | 41° | 1 | OK |
| 16 | 187.5 | 255 | 630 | 36.3° | 1 | OK |
| 17 | 176.5 | 275 | 628 | 32.7° | 2 | OK |
| 18 | 166.7 | 295 | 628 | 29.5° | 2 | OK |
Ramp layout
Gradient1 : 12 (8.3%)
Flights2 × 450 mm rise
Length per flight5.4 m
Intermediate landings1 × 1.53 m
Total length (straight)12.33 m
Add top and bottom landings, handrails both sides and edge protection per the rule set.