[permaculture] Re: Hobbitate for Humanity....
cure at rtinet.com
Mon Nov 8 17:26:52 EST 2004
on 11/8/04 9:00 AM, permaculture-request at lists.ibiblio.org at
permaculture-request at lists.ibiblio.org wrote:
> Message: 3
> Date: Mon, 8 Nov 2004 10:14:18 -0500
> From: Jay Woods <woodsjay at cox.net>
> Subject: Re: [permaculture] Re: permaculture Digest, Vol 22, Issue 9
> To: permaculture <permaculture at lists.ibiblio.org>
> Message-ID: <200411081014.18969.woodsjay at cox.net>
> Content-Type: text/plain; charset="iso-8859-1"
> There is far too much overengineering here. Remember that 10 foot diameter
> corrugated steel pipe (http://www.ncspa.org/ for the trade association and
> http://www.acipco.com/ for an example company) is used to give farmers access
> to their fields underneath freeways and to provide drainage for streams. The
> key thought here is that arched structures (like hobbit holes) carry far more
> load for the cross section than do load bearing flat ceilings.
I agree ...arched structures are best. I've researched some East Indian
sites on prefab ferro-cement technology with precast barreled vaults. But
they aren't easily buried and might tend to accumulate moisture between the
But in US....there's a firm in Texas with the most cost-effective method of
concrete dome construction I've found. They start with a big inflatable
They also give "hands on training" every year for self-builders... Two or
three classes a year, I think.
They claim to have great success with underground structures....
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