On 21/6/14, Bill, discombobulated, unleashed:

>We live on the bottom of an ancient lake bed. Dig down about 6 feet and 
>you will find an expansive clay that goes down another mile or so. When 
>the clay gets wet, it expands and houses actually lift slightly. The 
>large floor surface moves more than the footings however. Interior walls 
>in our basements have to be floated at least an inch and a half around 
>the perimeter to as much as 4 inches in the center of the basement of a 
>large house.
>It's only been in the past dozen years or so that the construction 
>industry has figured out how to build a stable basement in this area.
>Most of the basements here have horizontal cracks in the walls 
>destabilizing them and require steel C channels attached to the floor 
>joists above and buried in the concrete floor to keep the walls from 
>caving in.
>This is just about the stupidest place to build a city, and it turns out 
>that the reason it was put here was to enrich some local politicians who 
>owned land in the area and railroad magnates who were cooperative given 
>the proper amount of lubrication.
>Twenty miles in any direction takes one out of the lake bed and into 
>more stable ground.

Interesting!

Are there any geodesic buildings built on the clay that you know of?

Concept:

<http://en.wikipedia.org/wiki/Geodesic_dome#Methods_of_construction>

In effect, a foundation is laid, knee-walls built, then the dome
constructed onto this, put up pretty much like erecting a tent. Then any
internal walls are non-supporting, except for the 2nd floor (1st floor
for UK readers).

I desperately wanted to build on a couple of decades ago...

-- 


Cheers,
  Cotty


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