The best way to describe a helix, would be to look at the
picture below. It's a three-dimensional curved object that circles
around a center line. If you're familiar with one of America's favorite
toys, the slinky, all you need to do is pull the slinky apart and you've
got a helix.
Now when it comes to building a set of helix stairs
like this, you've really got to know what you're doing. I personally
have never attempted to build this type of stairway, but obviously they
can be built. Otherwise we wouldn't be looking at the one in the picture
above.
All I can say about this particular stairway, is that it is an
architectural wonder.
If you're interested, the helical stairway is located in Santa Fe, New
Mexico, United States of America. It was commissioned to be built in
1872 and makes two complete revolutions up to a choir loft.
According to Wikipedia, the name of the Church is called," Our Lady of
Light Chapel." Like I said earlier, the stairway is a modern marvel.
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