1. Stair Design and Construction 3/09
Architecture III
Stair Design and Construction
3/09

2. Stair Design and Construction
Key Terms
Baluster
Curtail
Guardrail
Handrail
Headroom
Kick Plate
Landing
Newel
Nosing
Rise
Riser
Run
Stringer
Tread
Well Hole

3. Stair Design and Construction

4. Stair Design and Construction

5. Stair Design and Construction
Inner string (closed)
Outer string (open)
Tread
Riser
Newel post
Balusters
Banister / Handrail
Return nosing
Fascia
Landing
Curtail

6. Stair Design and Construction
Stair Types
Straight
“L”- Shaped Stairs
Double “L” Stairs
“U”- Shaped Stairs
Winder
Spiral

7. Stair Design and Construction

8. Stair Design and Construction

9. Stair Design and Construction

10. Stair Design and Construction
Winder Stairs
vs.
“L” Shaped Stairs

11. Stair Design and Construction
4 Rules of Stairs
The slope of stairs should be between 30° - 35° ( S = 30° - 35°)
The sum of two risers and one tread should equal 25” (2R + T = 25)
The product of the riser height multiplied by the tread width should equal approximately 75” (R x T = 75)
The sum of one riser plus one tread should equal 17” – 18” (R + T = 17-18)