[Cob] Alternative Materials Justification

[Graeme North]

A small correction to the NZ standards reference

These do not specifically refer to cob apart from an informative sections but have been used many times to design cob buildings by making bricks and testing them to NZS 4298 as for adobe, with an additional shrinkage test thrown in. Cob was partially referred to in this manner as we were having trouble determining a reliable pre-construction test limit for cob shrinkage, but will be fully included in the revision currently under way. We are currently thinking about 0.5% over a standard 600mm long shrinkage box but any ideas on this welcome too.  

cheers

Graeme 
Graeme North Architects
49 Matthew Road
RD1
Warkworth 0981
tel/fax +64 (0)9 4259305

www.ecodesign.co.nz




> NZ4297:1998 New Zealand Standard - Engineering Design of Earth Buildings
> 
> NZ4298:1998  New Zealand Standard - Materials and Workmanship for Earth Buildings
> 
> NZ4299:1998  New Zealand Standard - Earth Buildings Not Requiring Specific Design







On 8/10/2014, at 3:44 AM, "Feile Butler" <feile at mudandwood.com> wrote:

> Hi Bill
> 
> This website has a large number of research papers on earth as a construction material.  https://sites.google.com/site/researchterra/research . You might find something here.
> 
> Also there are some national norms and codes which might prove helpful -
> 
> The Australian Earth Building Handbook
> 
> NZ97 New Zealand Standard - Engineering Design of Earth Buildings
> 
> NZ98 New Zealand Standard - Materials and Workmanship for Earth Buildings
> 
> NZ99 New Zealand Standard - Earth Buildings Not Requiring Specific Design
> 
> Regards
> 
> Féile Butler
> MRIAI B.Arch Dip. Arch Conservation Grade III
> 
> Assigned Certifier - Accredited PSDP
> 
> Co-Director of Earth Buidling UK
> 
> 
> Mud and Wood
> 
> Grange Beg, Skreen, Co. Sligo, Ireland
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> T:  +353 (0) 71 930 0488
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> M: +353 (0) 86 806 8382
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> E : feile at mudandwood.com
> 
> W: www.mudandwood.com
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> 
> 
> ----- Original Message ----- From: "Bill Wright, L.Ac., DNBAO" <bill at auburnacupuncture.net>
> To: "Coblist" <coblist at deatech.com>
> Cc: "Pablo Loayza" <info at naturallivingschool.com>
> Sent: Monday, October 06, 2014 8:56 PM
> Subject: [Cob] Alternative Materials Justification
> 
> 
>> 
>> 
>> Hi All,
>> 
>> The next phase of my building (sent link to pics
>> previously), is to get its jacket on - lime stucco. My building is a
>> simple, gable end round-wood timber framed structure, wrapped with
>> bale-cob, and a cob wall. I met w/ the man who will help me apply the
>> stucco, and for the gable ends; which are stick framed w/ 2"x6" DF
>> standard lumber, his preference is to stucco over a light-clay/straw
>> wall. I share his sensibilities, and have been envisioning the same
>> thing all along. However, this is unorthodox to my local county's
>> building codes to say the least!
>> 
>> If I am to do this, and I would like
>> to, I need to submit a form to my County's Building Dept., known as the,
>> "Alternate Materials, or Methods of construction and/or Design Request".
>> On the form it has a section called, "JUSTIFICATION", which reads,
>> "Attach copies of any reference, test reports, expert opinions, etc...
>> The Building Official may require that consultant be hired by the
>> applicant to perform test, research and analysis and submit a full
>> report of evaluation to the Building Division for consideration and
>> approval".
>> 
>> Anyone have references to, "test reports", "references",
>> "expert opinions"?
>> 
>> Thanks for being there...
>> 
>> Bill
>> 
>> -- 
>> 
>> Bill
>> Wright, L.Ac., DNBAO
>> 
>> Wright Acupuncture and Massage
>> 
>> 251 Auburn
>> Ravine Rd., Ste. # 205
>> 
>> Auburn, CA 95603
>> 
>> 530-886-8927
>> 
>> 
>> http://www.auburnacupuncture.net
>> 
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