[Cob] dirt bags (on behalf of Ryan Hunt)

[Patrick Newberry]

Ryan had a good point. It should be catenary which I meant but did not
articulate. The compass is usefull however for keeping your rows even as
you go up the catenary shape in your corbelling process and is
frequently used by Nader and crew and CalEarth.



Pat Newberry
 
 


-----Original Message-----
From: Ryan Hunt [mailto:ryanhunt at hugllc.com] 
Sent: Monday, December 12, 2005 8:23 PM
To: Patrick Newberry
Subject: Re: [Cob] dirt bags


The shape of the profile of the dome should be catenary.  There are a 
lot of good resources for understanding catenary arches and domes.  Try 
CalEarth at:
http://www.calearth.org


Patrick Newberry wrote:

>Well the best shap is round.
>
>Basically you put in a compass in the center of your circle. I used a 
>log/ stump with a wheel from a cart that would spin  360%. This becomes

>our measuring tool as you corbelle each row.
>
>Openings require small value forms.
>
>
>Pat Newberry
>www.gypsyfarm.com
>
>Also you can check out
>www.calearth.com
>
>
>
> 
>The box said "Requires WinXP, W2k, or better," and so I installed 
>Linux.
>
>
>
><snip>
>
>I guess this is not exactly the place to ask for help, as dirtbags
>buildings are not exactly cob, but I can't think of a better place to
>ask.
>
>I'm planning to build a dirtbag dome (5m diameter) and I need to know
>what would be the ideal shape (curve) for this kind of corbelled dome. 
>Does anyone here have relevant information on this subject?
>
>Thanks in advance,
>
>Nico.
>
></snip>
>
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