[Ferro List] Sphere leveling

[Ron Cleave]

Jano,  there is a process called "slab jacking" that involves pumping  
concrete under the slab to raise it up.   For what it's worth.  Ron C


On Feb 24, 2008, at 11:43 AM, Janoahsh wrote:

> Hi Chris,
> Where I live the ground is always moving downhill.  Houses built on  
> pilings
> demonstrate this by the pilings all leaning down hill within a few  
> years.
> Slabs work best.  This is earthquake and volcano country as well.
> What I'm thinking is that there should be some provision for  
> jacking or
> turning the sphere, that is built in, ahead of time.  Normal  
> buildings are
> built with beams, or flat slabs that can be jacked more easily, but  
> a thin
> shell sphere is not so endowed.
> The problem with a sphere is that a jack pointing directly away  
> from the
> sphere will not spin it but only push it in the opposite direction  
> and will
> probably damage the shell before any leveling is accomplished  
> unless some
> provision is made.
> This sphere will outlive conventional construction many times over  
> and this
> pretty much assures that leveling will be come an issue, if not on  
> my life,
> in future generations.
> Jano
>
> -----Original Message-----
> From: list-bounces at ferrocement.net [mailto:list- 
> bounces at ferrocement.net] On
> Behalf Of Christopher Glasspool
> Sent: Sunday, February 24, 2008 10:20 AM
> To: Ferrocement Discussion List
> Subject: [Ferro List] Sphere leveling
>
> Jano,
> Is this sphere going to be out of level because of permafrost  
> melting or
> some other anticipated occurrence? Given the even footprint of a dome,
> sphere, circle or even a square, I don't see the need for more than  
> the
> normal precautions for your area. Whether that is pilings, or a  
> floating
> slab (bottom for a sphere). I imagine Alaska has some very different
> building codes for foundations, or is everything just individually
> engineered? - chris
>
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