👉Staircase Rules & Formulas 👇
🚧1. Number of steps = Height of Floor (H) ÷ Rise (R)
🚧2. Tread width (T) = Total Length of Staircase (L) ÷ Number of Steps (N)
🚧3. Slope of staircase = tan⁻¹ ( Rise (R) ÷ Tread (T) )
🚧4. Landing Length = 1.2 m to 1.5 m
🚧5. Headroom clearance = Minimum 2.1 m
🚧6. Staircase width = 1.0 m to 1.5 m Sure
🚧7. Step Proportion Rule (Thumb Rule)
2 × Rise (R) + Tread (T) ≈ 550 mm to 700 mm
🚧8. Comfort Formula
⏺Rise (R) × Tread (T) ≈ 40000 to 42000 mm²
🚧9. Staircase Angle (θ)
⏺25° ≤ θ ≤ 40°
🚧10. Flight Height
⏺Flight Height = Number of Steps (N) × Rise (R)
🚧11. Total Run (Horizontal Length)
⏺Total Run = Number of Treads (T) × Tread width
🚧12. Width of Landing
⏺Landing Width ≥ Stair Width
🚧13. Maximum Riser Height
⏺R ≤ 190 mm (residential)
⏺R ≤ 150 mm (public buildings)
🚧14. Minimum Tread Width
⏺T ≥ 250 mm (residential)
⏺T ≥ 300 mm (public buildings)
🚧15. Step Proportion (Blondel’s Rule)
⏺2R + T ≈ 600 mm to 650 mm
🚧16. Maximum Flight (Steps in One Flight)
⏺≤ 12 steps (comfortable)
⏺≤ 16 steps (maximum)
🚧17. Minimum Width of Stairs
⏺Residential = 900 mm to 1000 mm
⏺Public = ≥ 1500 mm
🚧18. Handrail Height
⏺850 mm to 900 mm (from tread nosing)
🚧19. Headroom Clearance
⏺≥ 2100 mm (2.1 m)
🚧20. Landing Width Rule
⏺Landing Width ≥ Stair Width
🚧21. Preferred Staircase Angle
⏺25° – 35° (most comfortable)
40° (maximum)
🚧22. Spiral Stairs
⏺Minimum Tread at Centre = 150 mm
⏺Minimum Width of Step = 250 mm
⭐️Our YouTube Channel👇
https://youtube.com/@ethiopianconstruction?si=YPBAC3MRTl5Uu6BK
🚧1. Number of steps = Height of Floor (H) ÷ Rise (R)
🚧2. Tread width (T) = Total Length of Staircase (L) ÷ Number of Steps (N)
🚧3. Slope of staircase = tan⁻¹ ( Rise (R) ÷ Tread (T) )
🚧4. Landing Length = 1.2 m to 1.5 m
🚧5. Headroom clearance = Minimum 2.1 m
🚧6. Staircase width = 1.0 m to 1.5 m Sure
🚧7. Step Proportion Rule (Thumb Rule)
2 × Rise (R) + Tread (T) ≈ 550 mm to 700 mm
🚧8. Comfort Formula
⏺Rise (R) × Tread (T) ≈ 40000 to 42000 mm²
🚧9. Staircase Angle (θ)
⏺25° ≤ θ ≤ 40°
🚧10. Flight Height
⏺Flight Height = Number of Steps (N) × Rise (R)
🚧11. Total Run (Horizontal Length)
⏺Total Run = Number of Treads (T) × Tread width
🚧12. Width of Landing
⏺Landing Width ≥ Stair Width
🚧13. Maximum Riser Height
⏺R ≤ 190 mm (residential)
⏺R ≤ 150 mm (public buildings)
🚧14. Minimum Tread Width
⏺T ≥ 250 mm (residential)
⏺T ≥ 300 mm (public buildings)
🚧15. Step Proportion (Blondel’s Rule)
⏺2R + T ≈ 600 mm to 650 mm
🚧16. Maximum Flight (Steps in One Flight)
⏺≤ 12 steps (comfortable)
⏺≤ 16 steps (maximum)
🚧17. Minimum Width of Stairs
⏺Residential = 900 mm to 1000 mm
⏺Public = ≥ 1500 mm
🚧18. Handrail Height
⏺850 mm to 900 mm (from tread nosing)
🚧19. Headroom Clearance
⏺≥ 2100 mm (2.1 m)
🚧20. Landing Width Rule
⏺Landing Width ≥ Stair Width
🚧21. Preferred Staircase Angle
⏺25° – 35° (most comfortable)
40° (maximum)
🚧22. Spiral Stairs
⏺Minimum Tread at Centre = 150 mm
⏺Minimum Width of Step = 250 mm
⭐️Our YouTube Channel👇
https://youtube.com/@ethiopianconstruction?si=YPBAC3MRTl5Uu6BK
1 comment
Ⓜ️ MEMES🐾🌱SEED🍅 ⚡VIA
Tnx ENGINEEROCH YIBIZU
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