[Greenbuilding] Concrete foundation forms

[Rushd45]

Hi all,

I'm looking for a concrete foundation system, I think that somebody on this list provided a link, which I have lost... 

The system is basicly thin polypropelene, 6 mils thick or so, that is preprinted with dimensions/lines on it. You pound some stakes in the ground, 12" wide, 18" wide, what ever your foundation is, put 1x2s along the tops of the stakes, then put the plastic on the ground. Unfold the plastic so that it comes up the sides and you staple it to the 1x2s, put some more 1x2's across the top from side to side. There is the foundation form, a U shaped form held in place by the stakes and 1x2's. The plastic, even though thin has enough strength to hold the weight of the wet concrete.

I've made a little drawing, with a fixed-width font
 X is wood stake
-- and | are the plastic sides
c is the concrete
g is the ground

  _            _
  X|cccccc|X          
  X|cccccc|X
  X|cccccc|X
  X|cccccc|X
  X|cccccc|X
  X------------X
gXgggggggXg
gXgggggggXg

Thanks for the help,

Rush
Tucson AZ
www.ironandwood.org