[Cob] compare stonemasonry

[Kim West]

This site gives some volume/weight conversions.

http://www.diydata.com/materials/cement/cement.htm

----- Original Message ----- 
From: "Amanda Peck" <ap615 at hotmail.com>
<snip>
> I'm NOT a structural engineer.  Someone who is MAY be able to tell you 
> easily.  (Does anybody know off-hand about relative weights--concrete, 
> stone, cob?  I know there's a lot of "it all depends" in there.)
<snip>