[Cob] Next step

[howard at earthandstraw.com]

While the bags may well resist such a load I hope no one is attempting a 20 foot high wall of them as that would be very risky.


Howard Switzer, Architect
668 Hurricane Creek Road
Linden, TN 37096
931-589-6513
www.earthandstraw.com
  ----- Original Message ----- 
  From: Janet Standeford 
  To: Cob List 
  Sent: Wednesday, January 13, 2010 6:39 PM
  Subject: Re: [Cob] Next step


  Hi Damon,
  Actually the dirt is dampened and fed into bags already in place on the 
  wall. Coffee cans can be used, then the bags are jiggle tamped. That's 
  actually a lot less work than cob and it provides thermal mass.
   If my calcs are right the 840 kN/m Kathy mentioned is equivalent to 
  188,000 lbs/ft so with a wall only 20 feet high, there is no way the 
  bags can burst due to pressure.
  Also, jiggle tamping damp earth  in the bags should, per some sites I've 
  seen, create a more rammed earth effect after dry.
  If I'm wrong on this please let me know everyone.


  Damon Howell wrote:
  > "Does anyone here think the following is helpful to our 
  > cause?...EARTHBAG HOUSING"
  >
  > I never have come to an understanding of earth bags. What happens when 
  > the bags deteriorate? Hope I'm not around one when that happens. I've 
  > watched videos of people doing it and it seems to me cob construction 
  > is about the same amount of work. Plus I feel much safer standing 
  > beside a solid cob wall.
  >
  > Damon in GA, USA
  >
  >
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