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To Add Complex Free Reverse Spiral Curve Groups to Alignments

To add a free reverse spiral-curve-spiral-spiral curve group between an entity and a curve

Add a free reverse spiral-curve-spiral-spiral curve group between an entity (a tangent or a curve) and a curve. The last spiral in the curve group is a reverse spiral: spiral-curve-spiral-reverse spiral.

  1. Click the alignment. Click Alignment tabModify panelGeometry Editor Find.
  2. On the Alignment Layout Tools toolbar, click Free Reverse Spiral-Curve-Spiral-Spiral (From entity, end curve).
  3. Select the tangent or curve (the First Entity) from which you want to add the curve group.
  4. Select the curve (the Next Entity) to which you want to add the curve group.
  5. Specify whether the curve solution angle is less than 180 degrees or greater than 180 degrees.
  6. Specify the radius of the curve, or enter D to specify the degree of curvature.
    Note: To calculate the radius or degree of curvature using other known curve parameters, enter 'CCALC to open the Curve Calculator.
  7. Specify the length of the first spiral in.
    Note: You can specify length by picking two points in the drawing. Zero is an acceptable length for any of the spirals in this curve group.
  8. Specify the length of the first spiral out.
  9. Specify the length of the second spiral out.

To add a free reverse spiral-spiral-curve-spiral between a curve and an entity

Add a free reverse spiral-spiral-curve-spiral between a curve and an entity (a tangent or a curve). The second spiral in the curve group is a reverse spiral: spiral-reverse spiral-curve-spiral.

  1. Click the alignment. Click Alignment tabModify panelGeometry Editor Find.
  2. On the Alignment Layout Tools toolbar, click Free Reverse Spiral-Spiral-Curve-Spiral (From curve, end entity) .
  3. Select the curve (the First Entity) from which you want to add the curve group.
  4. Select the tangent or curve (the Next Entity) to which you want to add the curve group.
  5. Specify whether the curve solution angle is less than 180 degrees or greater than 180 degrees.
  6. Specify the radius of the curve, or enter D to specify the degree of curvature.
    Note: To calculate the radius or degree of curvature using other known curve parameters, enter 'CCALC to open the Curve Calculator.
  7. Specify the length of the first spiral in.
    Note: You can specify length by picking two points in the drawing. Zero is an acceptable length for any of the spirals in this curve group.
  8. Specify the length of the second spiral in.
  9. Specify the length of the spiral out.

To add a free reverse spiral-spiral-curve-spiral-spiral between two curves

Add a free reverse spiral-spiral-curve-spiral-spiral curve group between two curves. The second and last spirals in the curve group are reverse spirals: spiral-reverse spiral-curve-spiral-reverse spiral.

  1. Click the alignment. Click Alignment tabModify panelGeometry Editor Find.
  2. On the Alignment Layout Tools toolbar, click Free Reverse Spiral-Spiral-Curve-Spiral-Spiral (Between two curves).
  3. Select the curve (the First Entity) from which you want to add the curve group.
  4. Select the curve (the Next Entity) to which you want to add the curve group.
  5. Specify whether the curve solution angle is less than 180 degrees or greater than 180 degrees.
  6. Specify the radius of the curve, or enter D to specify the degree of curvature.
    Note: To calculate the radius or degree of curvature using other known curve parameters, enter 'CCALC to open the Curve Calculator.
  7. Specify the length of the first spiral in.
    Note: You can specify length by picking two points in the drawing. Zero is an acceptable length for any of the spirals in this curve group.
  8. Specify the length of the second spiral in.
  9. Specify the length of the first spiral out.
  10. Specify the length of the second spiral out.
Parent topic: Adding Lines, Curves, and Spirals to an Alignment

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