no problem;when it comes to stoves I am bitchier in person. just ask Paul
Ernie Wisner wrote:
the largest full system i would put on a wood floor is 8" and figure the load accordingly. cob is lighter than water by the cubic foot so you can calculate you load requirements by water and build in some safety margin.
I think the best small demo would be 6" system with thirty foot of exhaust ducting in three passes through a bench. build a frame for the whole thing and fill with the perlite and clay mix. the critical area is under the burn tunnel but to be safe as you can put the foundation under the whole thing.
Perlite and clay mixed and packed into a 2"X4" or brick frame then build the stove on it. this should give you a perlit/clay layer 1"3/4" (2"X4") to 2"1/2" (Brick) thick that supports the stove fine. if you want more insurance build the frame for the whole stove with brick on edge then layer in; 1 inch thick sand bed then fill with dry perlite , cap with a trimmed bit of 3/4" mason board build the stove right on top of it.
the only part of the stove that gets really hot us right around the burn tunnel this section is about 1 meter long by 2/3 of a meter wide.
I will have Erica look at this later and she will i am sure make it far more clear then I.