In article , Robin May
writes
The steps on the stairs are set at a distance which is about 1.5 times
that of a normal person's stride. This seems to be true for people of
all heights and leg lengths.

A well-designed stairway has two verticals plus one horizontal adding to
61cm. That is, in:

------+ A
+-+ :
| :
| :
| C~~~~~~D :
+--------+ :
+-+ :
| :
| :
| :
+--------+ B
+-+
|
|

the vertical distance AB plus the horizontal distance CD should be 61cm.
This matches the leg articulation for the average adult.

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