Bareiss columns?

[Jeandré]

> Hi, I'm currently enjoying my first read of the Mars series,
> and I wondered if any of you fans knew where I could see a
> drawing or photo of the "Bareiss column" mentioned. I did some
> searching and found only one (old) text reference to it.
> -Sheer curiosity. . .
> Thanks in advance.
> --
> David P. Crews

--
Jeandré
k...@go.to
http://go.to/ksr/

[chrisli...@gmail.com]

I looked for the same thing. If this query is still live 14 years later, you might try https://m.flickr.com/#/photos/2b/1076443/

Cheers
Chris

[trwe...@gmail.com]

Just Wondered the same thing during my first read, thanks for the link

[albinoflea]

On Thursday, December 4, 2014 2:07:20 AM UTC-5, trwe...@gmail.com wrote:
> Just Wondered the same thing during my first read, thanks for the link

I'm pretty sure the source of these is the October 1991 issue of Popular Science; the timing coincides well with the writing of Red Mars:

http://books.google.com/books?id=T0la7o3hnA4C&lpg=PP1&pg=PA16#v=onepage&q&f=false

They definitely have a different look than the rendering on Flickr that Chris posted a link to.

[baxendal...@gmail.com]

The rendering is correct from all explanations, as well as the original artist's interpretation. If I still had a solidworks license I would show a model of what the artist did.

If I understand it, he made a semicircle. He then made a second semicircle x distance above the first one. This second one was rotated about the center of the semicircle, not the center of the circle of which it is a part of. He then created a curved face between the two circles, probably with some sort of shortest path theory. It's hard to tell from that photo.

[gil...@gmail.com]

There is nothing in October, only in the Science News 1991.1.12 issue.

Just draw a semicircle in a horizontal plane. Put a copy below it rotated 180 degrees. The straight line connecting the ends of the lower semicircle is directly below the middle of the curved one above. Make n equally spaced points around the semicircle & along the straight edges. Then connect them. The semicircle morphs into a straight line going up or down.

[rjvin...@gmail.com]

Another 4 years on and the reference is also included in "New York 2140". Based on that single, rather small image in Popular Science I have created a Sketchup model replicating the picture. You can find it by searching the Sketchup warehouse for "Bareiss Column".
If you are familiar with sketchup you can scale and make other adjustments, one interesting feature I found was that scaling the model to tall, slender column significantly reduces the effect of the leaning.

Hope this is useful to someone...

[mdgo...@gmail.com]

Very useful. Thank you for taking the time to do that and to share it.