U-Shaped Staircase with Eight Winders Calculator

Error calculationPlease check your input
the Calculator will be available after changes in the relevant parameters.
Click "Calculate" to open the options window.
Switch interface
Display
DU
CL
Staircase Type
LF
RG
Connection type Winder Steps to Newel Post
LOC
INT
Stairs Dimensions, Stairwell
Y
X
Z
Calculate Total Run Along
FTP
FMD
FBT
Steps
QB
4
QM
0
QT
6
SW
SF
SO
SP
Risers
H
HT
AS
Stringers
T
WI
Winder Stringers
IT
IW
Support Joists
JT
JW
Support Posts
SB
Upper Floor Slab
ST
Balustrade
RH
BA
RT
RW
Wall
WT
Switch interface
Choose Drawing:
Switch interface
Distance: 0
Calculation results
Staircase Dimensions
  • Angle (Slope/Pitch): 30.17 °
  • Comfortable Staircase Formula (R + G): 42.96 cm
  • Blondel's Formula (2R + G): 58.75 cm
  • Rise (Step Height): 15.79 cm
  • Tread Depth (Step Width): 31.97 cm
  • Going: 27.17 cm
  • Number of Steps: 18 pcs.
  • Stairway Width: 100 cm
Lower Stringers
  • Minimum Throat Depth: 16.35 cm
Upper Stringers
  • Minimum Throat Depth: 16.35 cm
Lower Winder Stringer №1
  • Minimum Throat Depth: 23.5 cm
Middle Winder Stringer
  • Minimum Throat Depth: 20.49 cm
Upper Winder Stringer №2
  • Minimum Throat Depth: 20.49 cm
Materials for construction
Lower Stringers
  • Width: 30 cm
  • Length: 123.68 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.03 m3
Upper Stringers
  • Width: 30 cm
  • Length: 197.3 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.047 m3
Lower Winder Stringer №1
  • Width: 40 cm
  • Length: 106.27 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.017 m3
Middle Winder Stringer
  • Width: 40 cm
  • Length: 208.8 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.033 m3
Upper Winder Stringer №2
  • Width: 40 cm
  • Length: 110.58 cm
  • Thickness: 4 cm
  • Quantity: 1 pcs.
  • Volume: 0.018 m3
Winder Step №1
  • Width: 47.4 cm
  • Length: 100 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.038 m3
Winder Step №2
  • Width: 54.7 cm
  • Length: 131.38 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.057 m3
Winder Step №3
  • Width: 50.93 cm
  • Length: 137.24 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.056 m3
Winder Step №4
  • Width: 45.33 cm
  • Length: 111.95 cm
  • Thickness: 4 cm
  • Quantity: 2 pcs.
  • Volume: 0.041 m3
Straight Step
  • Width: 31.97 cm
  • Length: 100 cm
  • Thickness: 4 cm
  • Quantity: 10 pcs.
  • Volume: 0.128 m3
Risers (Straight Steps)
  • Width: 11.79 cm
  • Length: 100 cm
  • Thickness: 1.8 cm
  • Quantity: 10 pcs.
  • Volume: 0.021 m3
Riser (Winder Step №1)
  • Width: 11.79 cm
  • Length: 100 cm
  • Thickness: 1.8 cm
  • Quantity: 2 pcs.
  • Volume: 0.004 m3
Riser (Winder Step №2)
  • Width: 11.79 cm
  • Length: 101.37 cm
  • Thickness: 1.82 cm
  • Quantity: 2 pcs.
  • Volume: 0.004 m3
Riser (Winder Step №3)
  • Width: 11.79 cm
  • Length: 129.06 cm
  • Thickness: 1.83 cm
  • Quantity: 2 pcs.
  • Volume: 0.006 m3
Riser (Winder Step №4)
  • Width: 11.79 cm
  • Length: 98.46 cm
  • Thickness: 1.79 cm
  • Quantity: 2 pcs.
  • Volume: 0.004 m3
Balustrade
  • Handrail Width: 8 cm
  • Handrail Thickness: 4 cm
  • Balustrade Length: 338.72 cm
  • Volume: 0.011 m3
Balusters
  • Width: 5 cm
  • Length: 86.83 cm
  • Quantity: 11 pcs.
  • Volume: 0.024 m3
Lower Newel Post
  • Width: 8 cm
  • Length: 168.95 cm
  • Quantity: 1 pcs.
  • Volume: 0.011 m3
Upper Newel Post
  • Width: 8 cm
  • Length: 105.79 cm
  • Quantity: 1 pcs.
  • Volume: 0.007 m3
Support Posts
  • Width: 8 cm
  • Total Length: 812.84 cm
  • Total Volume: 0.052 m3
Support Post №1
  • Width: 8 cm
  • Length: 122.32 cm
  • Volume: 0.008 m3
Support Post №2
  • Width: 8 cm
  • Length: 74.95 cm
  • Volume: 0.005 m3
Support Post №3
  • Width: 8 cm
  • Length: 90.74 cm
  • Volume: 0.006 m3
Support Post №4
  • Width: 8 cm
  • Length: 185.47 cm
  • Volume: 0.012 m3
Support Post №5
  • Width: 8 cm
  • Length: 185.47 cm
  • Volume: 0.012 m3
Support Post №6
  • Width: 8 cm
  • Length: 153.89 cm
  • Volume: 0.01 m3
Support Joist №1
  • Width: 15 cm
  • Length: 93 cm
  • Thickness: 5 cm
  • Quantity: 1 pcs.
  • Volume: 0.007 m3
Support Joist №4
  • Width: 15 cm
  • Length: 93 cm
  • Thickness: 5 cm
  • Quantity: 1 pcs.
  • Volume: 0.007 m3
Initial parameters
Display
  • Units: cm
  • Drawing Color: color
Staircase Type
  • Left Turn:  selected
Connection type Winder Steps to Newel Post
  • Tongue and Groove Joint:  selected
Stairs Dimensions, Stairwell
  • Total Rise: 300 cm
  • Total Run: 263 cm
  • Stairway Width: 100 cm
Calculate Total Run Along
  • Upper Stairway:  selected
Steps
  • Quantity (Lower Stairway): 4 pcs.
  • Quantity (Winders): 8 pcs.
  • Quantity (Upper Stairway): 6 pcs.
  • Quantity (Middle Stairway): 0 pcs.
  • Total Quantity: 18 pcs.
Risers
  • Thickness: 1.8 cm
Stringers
  • Thickness: 4 cm
  • Width: 30 cm
Winder Stringers
  • Thickness: 4 cm
  • Width: 40 cm
Support Joists
  • Thickness: 5 cm
  • Width: 15 cm
Support Posts
  • Width: 8 cm
Upper Floor Slab
  • Thickness: 20 cm
Balustrade
  • Balustrade Height: 90 cm
  • Baluster Width: 5 cm
  • Handrail Thickness: 4 cm
  • Handrail Width: 8 cm
Wall
  • Thickness: 20 cm
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How to calculate U-Shaped Stair with Eight Winders (4+4 pcs)?

  • Step 1. Choose the measurement units, DU — mm, cm, m, inches, feet.
  • Step 2. Choose the drawing color, CL — monochrome, color.
  • Step 3. Choose the staircase type — left turn, LF, right turn, RG.
  • Step 4. Choose how to calculate total run — along upper stairway, FTP, along intermediate stairway, FMD, along lower stairway, FBT.
  • Step 5. Input the stair, stairwell dimensions — total rise, Y*, total run, X, stairway width, Z.
    * from the 1nd floor level to the 2nd floor level
    * total rise = stairwell height (if top step is on the 2nd floor level)
  • Step 6. Choose type of winder steps connection to newel post — tongue and groove joint, LOC, mounting inside the newel post, INT.
  • Step 7. Input the steps parameters — number of steps on upper stairway, QT, number of steps on intermediate stairway, QM, number of steps on lower stairway, QB, thickness, SW, nosing, SF*.
    * nosing = tread overlap
  • Step 7.1. Select to install the top step below 2nd floor level or keep it at the 2nd floor level, SP.
  • Step 8. Select to install risers or not, H.
  • Step 8.1. Input the risers parameter — thickness, HT.
  • Step 9. Input the stringers parameters — thickness, T, width, WI.
  • Step 10. Input the stringers with winders parameters — thickness, IT, width, IW.
  • Step 11. Input the support joists parameters — thickness, JT, width, JW.
  • Step 12. Input the support posts parameter — width, SB.
  • Step 13. Input the balustrade parameters — baluster width, BA, baluster height, RH, handrail thickness, RT, handrail width, RW.
  • Step 14. Input the upper floor slab parameter* — thickness, ST.
    * required for visualization only
  • Step 15. Input the wall parameter* — thickness, WT.
    * required for visualization only
  • Step 16. Please check all entered values, click the «Calculate» button and get a U-Shaped Staircase with Eight Winders design.

 

Plans of U-Shaped Staircase (8 Winders) — Layout Notations

Drawing U-shaped Staircase with Eight Winders
Drawing U-shaped Staircase with 8 Winders
Optimal Step Size
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