Free-form stair, example 1

Tool(s): Free-Form

Example 1:

(1) Line of travel
(2) Inner boundary: Points 1 through 6
(3) Outer boundary: Points 7 through 12
Points on line of travel: Points 13 through 18
(A) Start angle: = + 180°
(B) Angle of rotation = delta angle = - 360°
(C) Bottom = top