Stair Architecture
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Stair Architecture

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Stair Architecture Presentation Transcript

  • 1. Architecture Intro to Creating Stairways
  • 2. Terms for Stairs
    • Handrail
      • 30” high on slope
      • 34” high on landings
    • Landings
      • Flat floor area connected to stairs
  • 3. Cast Concrete Stairs
  • 4. Terms of Stairs
    • Baluster
      • Vertical member holding handrail
    • Tread
      • Horizontal parts of the steps
      • 1” to 1.25” thick
      • 10.5” to 11.5” deep
  • 5. Terms for Stairs
    • Riser
      • Vertical parts of the steps
      • .75” thick
      • 7” to 7 5/8” high
    • Nosing
      • Overhang of the tread
      • Approximately 1”
  • 6.  
  • 7.  
  • 8. Terms for Stairs
    • Stringer
      • Diagonal members, notched to hold risers and treads
      • Min. of 2 needed
      • If over 3’, then 3 is needed
  • 9.  
  • 10. Terms for Stairs
    • Headroom
      • Minimum distance from slope to ceiling is 6’6” minimum
    • Total Rise
      • Floor to floor measurement
    • Total Run
      • Distance from front of first step to end of last (landing to landing)
  • 11.  
  • 12. Types of Stairs
    • Straight
    • L
    • Double L
    • U
    • Winder
    • Spiral
    • Circular
  • 13. 4 Rules to calculating stairs
    • Slope must be 30-40 degrees
    • 2 risers and 1 tread=close to 25”
    • 1 riser X 1 tread=close to 75”
    • 1 riser + 1 tread=close to 17”
  • 14. Procedure in Planning Step 1
    • Determine the total rise (floor to floor)
      • Example:
        • Floor to ceiling 8’
        • Ceiling ½”
        • Ceiling joist 9 ¼”
        • 2 nd floor sub floor ¾”
        • 2 nd floor, floor ½”
    • Total rise= 107”
  • 15. Procedures in Planning Step 2
    • Figure out NUMBER and SIZE of risers
      • Divide total rise by 7 (for starters)
      • Round this number to an exact # (15, 16)
      • Divide this # into total rise to get actual size of risers
  • 16. Example Cont.
    • 107” divided by 7=15.28
    • Round this number to 15 or 16
    • Divide 107 by 15=7.13
    • Divide 107 by 16=6.6
      • This is the actual size of the risers!!!!!
  • 17. Procedures in Planning Step 3
    • Figure out NUMBER and SIZE of tread
      • Use rule #2 to find size (around 10.5-11)
      • Recheck with rule 3 and 4
      • Always one less tread than riser
      • # of treads x tread size must equal total run
  • 18. Things you have to calculate
    • Total rise=
    • Total run=
    • Rise of step=
    • Run of step= (tread)(10.5-11.5)
    • # of risers=
    • # of treads=
    • Angle of stairs=
    • Handrail height=
  • 19. Other Steps
    • 4. Draw riser, tread grid pattern
    • 5. Darken riser, tread and nosing
    • 6. Draw stringer (usually 12”)
    • 7. Find rough opening (min 6’6”)
    • 8. Recheck
    • Detail with balusters, handrails, etc.
  • 20. Other steps
    • 8’10”=106”
    • 106 divided by 7=15.14
    • Round down to 15
    • 106 divided by 15=7.06 actual riser height
    • 10.5 tread
    • 15 risers
    • 14 treads