or drop .json file

Stair Parameters

Room length, mmRoom width, mmFloor height, mmFloor slab thickness, mm

Lock opening

Opening length, mmOpening width, mmPosition X, mmOffset from far wall, mm

Stair angle, °target value — refined after step calculationStair width, mmTread thickness, mmNose overhang, mm

Install railings

Upper railing

PositionRailing height, mmHandrail width, mmBaluster width, mmBaluster spacing, mmPost width, mm

TreadsRisersStringers

Step count17

Riser height 176.5 mm

Tread depth 271.7 mm

Stair angle34.6°

Headroom 2054 mm

Blondel formula 625 mm

Wood volume 0.65 m³

Weight (approx.) 488 kg

Material cost (approx.) 1012 $

✓ Riser height: 176mm (150–200)

✓ Tread depth: 272mm (250–300)

✓ Blondel formula (2h+g): 625mm (600–640)

✓ Stair angle: 35° (23–37)

⚠ Headroom clearance: 2054mm (min 2000)

✓ Stair width: 900mm (min 800)

✓ Railing height: 1000mm (min 900)

✓ Baluster spacing: 130mm (max 150)

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