Isometric of Stairs
Illustration of stairs; 3-dimensional view of 4 steps. The staircase can be created by combining/stacking various sizes of rectangular solids.
Ervin Kenison, S. B. and Edward B. Waite, S. B. Mechanical Drawing (Chicago: American School Of Correspondence, 1917) Part III: Page 122
Courtesy the private collection of Roy Winkelman