Trap rekenmachine
Design stairs, calculate riser height, tread depth, stringer length, angle, and check building code compliance. 3 calculation modes with step-by-step solutions.
Berekenen
Select a calculation type, enter your measurements, and click Calculate to see stair dimensions, stringer length, and code compliance with step-by-step solutions.
Resultaat
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Code Compliance
Stapsgewijze oplossing
Volledige gebruikershandleiding
What is the Stair Calculator?
The Stair Calculator helps you design safe, code-compliant stairs. Enter the total rise (floor-to-floor height), and it calculates the number of risers, riser height, tread depth, total run, stringer length, and angle — all checked against building codes (IRC/IBC).
3 Calculation Modes
Design
Totale stijging → stijgbuizen, stijgbuishoogte, loopvlak, run, stringer.
Riser & Tread
Gegeven R, T, n → totale stijging, run, stringer.
Stringer
Stijgen + rennen → stringerlengte, hoek.
Normen voor bouwvoorschriften
| Parameter | Bereik | Ideal |
|---|---|---|
| Hoogte stijgbuis | 4–7.75" | 7" |
| Profieldiepte | 10–14" | 11" |
| 2R + T Formula | 24–25" | 24.5" |
| Max Rise tussen landingen | 12 ft | — |
Terminologie van trappen
📏 Verhoger — vertical face of the step
🦶 Loopvlak — horizontal surface you step on
📐 Stringer — diagonale steunbalk onder de treden
⬆️ Totale stijging — floor-to-floor vertical height
➡️ Totale run — horizontal distance from top to bottom
Gemeenschappelijke afmetingen
🏠 Residential: 7" riser, 11" tread (2R+T = 25)
🏢 Commercial: 6.5" riser, 12" tread (2R+T = 25)
🪜 Steep: 7.5" riser, 10" tread (2R+T = 25)
🚶 Gentle: 6" riser, 13" tread (2R+T = 25)
Belangrijke opmerkingen
- All risers must be uniform height (max ⅜" variation).
- Controleer de lokale bouwvoorschriften; de vereisten variëren per rechtsgebied.
- Minimale vrije ruimte: 6 ft 8 in (80 inch).
- Leuningen vereist aan minstens één zijde voor 4+ stootborden.