đŞIDEAL STAIR TREAD & RISER DIMENSIONS â A CIVIL ENGINEERING GUIDE
Proper stair dimensions are essential for comfortable, safe, and efficient movement between floors. The correct relationship between the riser height and tread depth helps reduce fatigue and the risk of tripping.
đ 1. Riser (R)
The vertical distance between two consecutive stair treads.
- Typical guideline: 150â180 mm
- Excessively high risers can make stairs difficult to climb.
đ 2. Tread / Going (T)
The horizontal distance between successive stair nosings.
- Typical guideline: 250â300 mm
- Adequate tread depth provides sufficient foot space.
𧹠3. Stair Nosing
The front edge of a stair tread, which may project slightly beyond the riser below.
- Typical projection: approximately 20â30 mm, where permitted by the applicable code.
đ 4. Stair Comfort Rule
A commonly used preliminary design guideline is:
2R + T â 600â630 mm
Example:
- Riser (R) = 170 mm
- Tread (T) = 290 mm
Calculation:
2(170) + 290 = 630 mm â
This satisfies the illustrated rule of thumb.
â ď¸ Important Construction Notes
- Keep riser heights and tread depths uniform throughout each flight.
- Check stair width, headroom, landings, handrails, and balustrades against the applicable building regulations.
- Consider the building's occupancy and accessibility requirements.
- These dimensions are general guidelines, not universal code requirements. Always verify the applicable local building code before construction.
đď¸ Build smarter, build stronger!
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@etconp
Proper stair dimensions are essential for comfortable, safe, and efficient movement between floors. The correct relationship between the riser height and tread depth helps reduce fatigue and the risk of tripping.
đ 1. Riser (R)
The vertical distance between two consecutive stair treads.
- Typical guideline: 150â180 mm
- Excessively high risers can make stairs difficult to climb.
đ 2. Tread / Going (T)
The horizontal distance between successive stair nosings.
- Typical guideline: 250â300 mm
- Adequate tread depth provides sufficient foot space.
𧹠3. Stair Nosing
The front edge of a stair tread, which may project slightly beyond the riser below.
- Typical projection: approximately 20â30 mm, where permitted by the applicable code.
đ 4. Stair Comfort Rule
A commonly used preliminary design guideline is:
2R + T â 600â630 mm
Example:
- Riser (R) = 170 mm
- Tread (T) = 290 mm
Calculation:
2(170) + 290 = 630 mm â
This satisfies the illustrated rule of thumb.
â ď¸ Important Construction Notes
- Keep riser heights and tread depths uniform throughout each flight.
- Check stair width, headroom, landings, handrails, and balustrades against the applicable building regulations.
- Consider the building's occupancy and accessibility requirements.
- These dimensions are general guidelines, not universal code requirements. Always verify the applicable local building code before construction.
đď¸ Build smarter, build stronger!
ââââââââââââââââ
đáá°á¨á᪠áá¨á áĽá ááá˝ á¨áŽááľáľáŤáá˝á ááá áááὠᨠYouTube ááá˝á á¨áłá˝ áŁáá ááá á áááŁáľ SubScribe á ááá á¤á°á°áĽ áááđ
https://youtube.com/@ethiopianconstruction7?si=ils307xXQQpIdCwG
@etconp
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