L-Shaped Staircase with Auto Winders Calculator

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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
Stairs Dimensions, Stairwell
LB
LT
Staircase Construction Mode
EX
AB
AT
Staircase Dimensions
SH
SW
Steps
MW
MF
DH
SC
SF
SO
SP
Risers
HV
HT
Stringers
T
WI
QT
4
Upper Floor Slab
SX
WX
ST
Wall
WT
Switch interface
Choose Drawing:
Switch interface
Distance: 0
Calculation results
Staircase Dimensions
  • Angle (Slope/Pitch): 34.2 °
  • Comfortable Staircase Formula (R + G): 39.05 cm
  • Blondel's Formula (2R + G): 54.84 cm
  • Rise (Step Height): 15.79 cm
  • Going: 23.26 cm
  • Number of Steps: 18 pcs.
  • Stairway Width: 100 cm
  • Correct a Going (Lower Stairway): 10.17 cm
  • Correct a Going (Upper Stairway): -20.33 cm
Materials for construction
Step № 1
  • Length: 100 cm
  • Tread Depth: 27.21 cm
  • Thickness: 4 cm
  • Volume: 0.011 m3
Step № 2
  • Length: 100 cm
  • Tread Depth: 27.21 cm
  • Thickness: 4 cm
  • Volume: 0.011 m3
Step № 3
  • Length: 100 cm
  • Tread Depth: 31.83 cm
  • Thickness: 4 cm
  • Volume: 0.013 m3
Step № 4
  • Length: 103.92 cm
  • Tread Depth: 37.92 cm
  • Thickness: 4 cm
  • Volume: 0.016 m3
Step № 5
  • Length: 118.25 cm
  • Tread Depth: 43.95 cm
  • Thickness: 4 cm
  • Volume: 0.021 m3
Step № 6
  • Length: 149.18 cm
  • Tread Depth: 45.97 cm
  • Thickness: 4 cm
  • Volume: 0.027 m3
Step № 7
  • Length: 151.42 cm
  • Tread Depth: 42.43 cm
  • Thickness: 4 cm
  • Volume: 0.026 m3
Step № 8
  • Length: 123.75 cm
  • Tread Depth: 41.84 cm
  • Thickness: 4 cm
  • Volume: 0.021 m3
Step № 9
  • Length: 107.29 cm
  • Tread Depth: 39.07 cm
  • Thickness: 4 cm
  • Volume: 0.017 m3
Step № 10
  • Length: 100.68 cm
  • Tread Depth: 30.07 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 11
  • Length: 100 cm
  • Tread Depth: 28.91 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 12
  • Length: 100 cm
  • Tread Depth: 28.91 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 13
  • Length: 100 cm
  • Tread Depth: 28.9 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 14
  • Length: 100 cm
  • Tread Depth: 28.91 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 15
  • Length: 100 cm
  • Tread Depth: 28.9 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 16
  • Length: 100 cm
  • Tread Depth: 28.91 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 17
  • Length: 100 cm
  • Tread Depth: 28.9 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Step № 18
  • Length: 100 cm
  • Tread Depth: 28.91 cm
  • Thickness: 4 cm
  • Volume: 0.012 m3
Riser № 1
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 2
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 3
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 4
  • Length: 100.59 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 5
  • Length: 105.22 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 6
  • Length: 120.45 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.003 m3
Riser № 7
  • Length: 141.42 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.003 m3
Riser № 8
  • Length: 118.2 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.003 m3
Riser № 9
  • Length: 103.45 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 10
  • Length: 100.07 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 11
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 12
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 13
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 14
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 15
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 16
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 17
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Riser № 18
  • Length: 100 cm
  • Width: 11.79 cm
  • Thickness: 1.8 cm
  • Volume: 0.002 m3
Initial parameters
Display
  • Units: cm
  • Drawing Color: color
Staircase Type
  • Left Turn:  selected
Stairs Dimensions, Stairwell
  • Length along Lower Stairway: 200 cm
  • Length along Upper Stairway: 350 cm
Staircase Construction Mode
  • Fixed Total Run:  selected
Staircase Dimensions
  • Total Rise: 300 cm
  • Stairway Width: 100 cm
Steps
  • Minimum Tread Depth at the Connection to the Support Post: 10 cm
  • Minimum Tread Depth at the Connection to the Stringer: 4 cm
  • Rise: 16 cm
  • Thickness: 4 cm
  • Tread Overhang (Nosing): 3 cm
  • Tread Overhang (Side): 3 cm
Risers
  • Thickness: 1.8 cm
Stringers
  • Thickness: 4 cm
  • Minimum Throat Depth: 15 cm
  • Quantity: 3 pcs.
Upper Floor Slab
  • Slab Overhang: 210 cm
  • Distance from Wall: 140 cm
  • Thickness: 20 cm
Wall
  • Thickness: 20 cm
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How to calculate L-Shaped Stair with AUTO Winders?

  • 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 the staircase construction mode — fixed total run, EX, fixed total run №2, total run №1 is calculated automatically, AB, fixed total run №1, total run №2 is calculated automatically, AT.
  • Step 5. Input the stair, stairwell dimensions — total rise, SH*, stairway width, SW, length along lower stairway, LB, length along lower stairway, LT.
    * 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. Input the steps parameters — rise, DH, thickness, SC, nosing, SF*.
    * nosing = tread overlap
  • Step 6.1. Input the winder steps parameters* — minimum tread depth at the connection to the support post, MW, minimum tread depth at the connection to the stringer, MF.
    * more details in the image below
  • Step 6.2. Select to install the top step below 2nd floor level or keep it at the 2nd floor level, SP.
  • Step 7. Select to install risers or not, H.
  • Step 7.1. Input the risers parameter — thickness, HT.
  • Step 8. Input the stringers parameters — thickness, T, minimum throat depth, WI, quantity, QT*.
    * standard stair — 2 pcs (by default)
    * custom stair — 3-5 pcs
    * mono stringer stair — 1 pcs
  • Step 9. Input the upper floor slab parameters* — thickness, ST, overlap, SX, distance from wall, WX.
    * required for visualization only
  • Step 10. Input the wall parameter* — thickness, WT.
    * required for visualization only
  • Step 11. Please check all entered values, click the «Calculate» button and get a L-Shaped Staircase with Winders (AUTO pcs) design.

 

Plans of L-Shaped Staircase (AUTO Winders) — Layout Notations 

Drawing L-shaped Staircase with Auto Winders
Drawing L-shaped Staircase with Auto Winders
Optimal Step Size
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