L-shape staircase designer

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Stair Parameters

Stair Type

L-shaped

Room

Room length

6500 мм

Room width

6500 мм

Floor height

2800 мм

Floor slab thickness

200 мм

Opening

Opening length

3000 мм

Opening width

2500 мм

Position X

0 мм

Offset from far wall

0 мм

Staircase

Stair width

900 мм

Tread thickness

40 мм

Tread overhang

30 мм

Stringer type

Turn

Direction

Turn type

Steps before turn7

Railings

Position

Railing height 1000 мм

Handrail width 70 мм

Baluster width 40 мм

Baluster spacing 130 мм

Post width 80 мм

Materials

Treads

Risers

Stringers

Calculation Results

Step count15

Riser height 200 mm

Tread depth 266.7 mm

Stair angle37°

Headroom 2800 mm

Blondel formula 667 mm

Wood volume 0.631 m³

Weight (approx.) 473 kg

Material cost (approx.) 1007 $

Standards Check

⚠ Riser height: 200mm (150–200)

✓ Tread depth: 267mm (250–300)

✗ Blondel formula (2h+g): 667mm (600–640)

✓ Stair angle: 37° (30–39)

✓ Headroom clearance: 2800mm (min 2000)

✓ Stair width: 900mm (min 800)

✓ Railing height: 1000mm (min 900)

✓ Baluster spacing: 130mm (max 150)

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