Stringer Channels

Reference Parameters

• BaseLength - represents the distance between Lower Constraint Axis and Upper Constraint Axis

• LowerMiterOffset

• LowerSquareOffset

• UpperSquareOffset

• (NOTE: UpperMiterOffset is not included in this list, as it must be a calculated value instead of a reference dimension)

Expressions for Default User Parameters

• B_L: BaseLength

• G_OFFSET_START

  • if BottomCutType = Square: - LowerSquareOffset

  • if BottomCutType = Miter: LowerMiterOffset

• G_OFFSET_END

  • if TopCutType = Square: UpperSquareOffset

  • if TopCutType = Miter: UpperMiterOffset

User-Defined Parameters

• BasePlateThickness - default value 0.25, set from PA

• TopPlateThickness - default value 0.25, set from PA

• Landing Position - change name based on context

  • TopLandingHeight - 144 stringers only, set from PA

  • UpperLandingHeight - 216 upper stringers only, set from PA

  • MidLandingHeight - 216 lower stringers only, set from PA

• Landing Offset - change name based on context

  • TopLandingOffset - 144 stringers and 216 upper stringers, set from PA

  • MidLandingOffset - 216 lower stringers, arbitrary value 0

• Post Position - change name based on context

  • FirstPostPosition - 144 stringers only, set from PA

  • FirstPostPositionLower - 216 lower stringers only, set from PA

  • FirstPostPositionUpper - 216 upper stringers only, arbitrary expression = UpperLandingHeight / tan(StairAngleFromFloor) - 1 in

• TopCutType - text values “Miter/Square”

• BottomCutType - text values “Miter/Square”

• TopStepDepth - default value 2.5, set from PA

• TreadRise - set from PA

• TreadRun - set from PA

• NumRises - set from PA

• TreadPatternSpacing - arbitrary expression sqrt(( TreadRise / 1 in ) ^{2 ul + ( TreadRun / 1 in )} 2 ul) * 1 in

• TreadHoleDiameter - arbitrary value 0.46

• TreadHoleFromFront - default value 1.5, set from TA

• TreadHoleFromTop - default value 1.5 set from TA

• TreadHoleSpacing - default value 7, set from TA

• ChannelSize - for changing size, set from PA

• UpperMiterOffset - arbitrary expression TopLandingOffset / sin(StairAngleFromFloor)

Mid Plane - the center of the flanges (for constraint)

• Define as midplane between Bottom Plane and Top Plane

Lower Constraint Axis - where the Left Plane intersects the floor

• XY Plane at landing end: define by Left Plane and Floor Plane

• XY Plane at floor end: define by Left Plane and XY Plane

Upper Constraint Axis - where the Left Plane intersects the landing

• XY Plane at landing end: define by Left Plane and Floor Plane

• XY Plane at floor end: define by Left Plane and XY Plane

Landing Plane - represents the position of the landing.

• XY Plane at landing end: define by Upper Constraint Axis and angle from Left Plane (StairAngleFromFloor)

• XY Plane at floor end: define by an offset from Floor Plane (Landing Position)

Floor Plane - represents the position of the floor

• XY Plane at landing end: define by an offset from Landing Plane (Landing Position)

• XY Plane at floor end: define by Lower Constraint Axis and angle from Left Plane (StairAngleFromFloor)

Landing Channel Position Plane - the actual position of the channel

• Define as offset from top plane (TopLandingOffset)

Top Square Cut (through all)

• Active: TopCutType = "Square"

Top Miter Cut (through all)

• Active: TopCutType = "Miter"

Bottom Square Cut (through all)

• Active: BottomCutType = "Square"

Bottom Miter Cut (through all)

• Active: BottomCutType = "Miter"

Tread Hole (Diameter = TreadHoleDiameter)

Tread Hole Pattern (QTY = NumRises - 1 ul; Spacing = TreadPatternLength)