[Cob] Con greenhouse

[Dean]

Another idea to
Brace that unsupported 16' wall. Form a column in the wall with 3 pieces 18"lumber, pour concrete with a couple pieces rebar full height. Integral column.  Not sure the voids of dry concrete are such a good idea. May cause cracking

Sent from my iPhone

> On Sep 19, 2015, at 1:00 PM, coblist-request at deatech.com wrote:
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> Today's Topics:
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>   1. cob greenhouse question (Malcolm Schluenderfritz)
>   2. Re: cob greenhouse question (john fordice)
>   3. Fwd:  cob greenhouse question (Malcolm Schluenderfritz)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Fri, 18 Sep 2015 13:31:38 -0600
> From: Malcolm Schluenderfritz <mschluenderfritz at gmail.com>
> To: coblist at deatech.com
> Subject: [Cob] cob greenhouse question
> Message-ID:
>    <CALUHa8=AdWoxeqQc4eZUGyyg4jDeeaCR19wud-Ro-m402GvVVQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
> 
> I am building a small greenhouse, 16 feet by 8 feet, and 8 feet tall. The
> North and West walls will be cob, and about 18 inches thick. I will be
> inserting some pieces of concrete as we go, in the center of the wall. The
> walls are straight, not curved.
> Do I need to add buttresses to this wall to keep it up, or is it thick
> enough? The North and West walls already form a corner, so they provide at
> least a little Lateral support to each other.
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Fri, 18 Sep 2015 15:56:44 -0700
> From: john fordice <otherfish at comcast.net>
> To: Malcolm Schluenderfritz <mschluenderfritz at gmail.com>
> Cc: coblist at deatech.com
> Subject: Re: [Cob] cob greenhouse question
> Message-ID: <204C9D53-2BB8-40FC-A1D1-E50C8B143F91 at comcast.net>
> Content-Type: text/plain;    charset=utf-8
> 
> Hi Malcom,
> Do you have a drawing of what you intend to build ?
> If so, please send it to me as a pdf & I?lltry to answere your questions.
> john fordice  -  Cob Research Institute
> www.cobcode.org <http://www.cobcode.org/>
> 
>> On Sep 18, 2015, at 12:31 PM, Malcolm Schluenderfritz <mschluenderfritz at gmail.com> wrote:
>> 
>> I am building a small greenhouse, 16 feet by 8 feet, and 8 feet tall. The
>> North and West walls will be cob, and about 18 inches thick. I will be
>> inserting some pieces of concrete as we go, in the center of the wall. The
>> walls are straight, not curved.
>> Do I need to add buttresses to this wall to keep it up, or is it thick
>> enough? The North and West walls already form a corner, so they provide at
>> least a little Lateral support to each other.
>> _______________________________________________
>> Coblist mailing list
>> Coblist at deatech.com
>> http://www.deatech.com/mailman/listinfo/coblist
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Sat, 19 Sep 2015 10:51:21 -0600
> From: Malcolm Schluenderfritz <mschluenderfritz at gmail.com>
> To: Coblist at deatech.com
> Subject: [Cob] Fwd:  cob greenhouse question
> Message-ID:
>    <CALUHa8=KV8stZPDgv9YxCY1xJoWrwqYHxD+Y7AON4=aq6yXqPQ at mail.gmail.com>
> Content-Type: text/plain; charset=UTF-8
> 
> ---------- Forwarded message ----------
> From: Malcolm Schluenderfritz <mschluenderfritz at gmail.com>
> Date: Fri, Sep 18, 2015 at 8:40 PM
> Subject: Re: [Cob] cob greenhouse question
> To: Howard Switzer <howard at earthandstraw.com>
> 
> 
> Hello Howard,
> 
> Thanks for the advice.
> 
> I will try to post a plan soon.
> 
> I am stuck with the 18" base because the foundation is already build. I
> agree that it seems something is needed at the North East corner.
> 
> The concrete is to use it up and to speed drying on the wall. (An idea from
> "The Hand Sculpted House." ) I got huge loads of broken concrete dumped for
> the foundation and for retaining walls on other parts of the site. These
> are pieces that are fairly good but not quite square enough for those uses.
> Spaced widely (so that they do not form problematic joints) in the core of
> the wall, it seems that they will allow me to use less cob, which not only
> means faster drying, but also less cob mixing and less purchased sand use.
> 
> I would think that if cob is strong enough to arch over small niches, it
> would be strong enough to take a few pieces of concrete inside the wall.
> But correct me if I am wrong.
> 
> 
> 
> On Fri, Sep 18, 2015 at 8:29 PM, Howard Switzer <howard at earthandstraw.com>
> wrote:
> 
>> I know John will take good care of you, (do post your plan if you can) but
>> basically you got a 16 foot wall braced on one end, right, so sounds like
>> you need to brace the other end somehow. Now I expect there will be an east
>> wall so you might consider bracing it in such a way as it could serve to
>> buttress the end of the wall and you might want to embed some anchors in
>> the cob for attaching that bracing wall....or you could just do a cob
>> buttress off the end of the wall in the other direction, which is probably
>> the better option, just guessing. You might also want to consider battering
>> the wall a bit, wider (20") at the bottom than the top (16"), right? Might
>> add some more stability. What are the concrete pieces doing in the middle
>> of it?  Just trying to get rid of it or something?
>> 
>> 
>> 
>> On Fri, Sep 18, 2015 at 2:31 PM, Malcolm Schluenderfritz <
>> mschluenderfritz at gmail.com> wrote:
>> 
>>> I am building a small greenhouse, 16 feet by 8 feet, and 8 feet tall. The
>>> North and West walls will be cob, and about 18 inches thick. I will be
>>> inserting some pieces of concrete as we go, in the center of the wall. The
>>> walls are straight, not curved.
>>> Do I need to add buttresses to this wall to keep it up, or is it thick
>>> enough? The North and West walls already form a corner, so they provide at
>>> least a little Lateral support to each other.
>>> _______________________________________________
>>> Coblist mailing list
>>> Coblist at deatech.com
>>> http://www.deatech.com/mailman/listinfo/coblist
>> 
>> 
>> 
>> --
>> Howard Switzer - Architect
>> 668 Hurricane Creek Road
>> Linden, TN 37096
>> 931 589 6513
>> www.earthandstraw.com
>> 
>> ?You never change things by fighting the existing reality.
>> To change something, build a new model that makes the existing model
>> obsolete.?
>> ? Richard Buckminster Fuller
>> <http://www.goodreads.com/author/show/165737.Richard_Buckminster_Fuller>
> 
> 
> 
> 
> 
> 
> 
> -- 
> Malcolm Schluenderfritz
> Secretary,
> 
> The Saint Isidore Society,
> saintisidoresociety.wordpress.com
> 
> 
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> End of Coblist Digest, Vol 13, Issue 19
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