I want to build a pwf in ohio, I talk to a panel supplier in Michigan. Can a wood foundation be installed on a ply sheeted footing plate with out concrete? Can a pwf be installed with only one wall layout?? The wood foundation supplyer said he will install the plywood up and down, is the better?? The panel supplyer said there is no need for a design or to install big pads for beam supports. Is this right. I look at some web site and this information is different. Who is right??? The wood foundations web site or a low cost Panel company selling a one panel does all plan?? Help me.