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

Really? When exactly was this average leg articulation determined? Or
did someone make a rough guess of 2 ft some years ago, which sounds so
much more accurate when expressed to the nearest centimetre.

I read about it in Scientific American at least 25 years ago, possibly
more. So you'll have to do your own research beyond that.

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Clive D.W. Feather | Home:
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