345a6fca   
   From: one-if-by-land@concord.com   
      
   "RicodJour"  wrote in message   
   news:61950cac-c783-4bf0-9d11-79caefb12f3e@i36g2000prf.googlegroups.com...   
   > On Apr 13, 10:29 am, "Ken S. Tucker"  wrote:   
   >> On Apr 12, 8:49 am, 3D Peruna  wrote:   
   >>   
   >>   
   >>   
   >> > EDS wrote:   
   >> > > However even further North in permafrost areas, the   
   >> > > buildings must be insulated from the earth to avoid melting the   
   >> > > permafrost.   
   >> > > I worked on one project where we put in 2' of stone on the   
   >> > > permafrost, and   
   >> > > built a wood frame sitting on the stone to support the building, with   
   >> > > a 3'   
   >> > > space between building and stone. Another way is to set wood piles   
   >> > > into the   
   >> > > ground down to below the permafrost summer melt line, and build your   
   >> > > structure several feet above grade.   
   >>   
   >> > That past few winters we've had little snow and brutal cold   
   >> > temperatures.  A couple of winters ago, almost everyone's septic   
   >> > systems   
   >> > froze up.  Frost down 7' in most places with a few reaching 8'.   
   >>   
   >> > Frost design depth here is 5'...  But most people just opt for the   
   >> > additional small expense and go 8+' with a basement (unless they have   
   >> > water table issues).   
   >>   
   >> We had a general rule in our neighbourhood,   
   >> don't drive over the septic field with a snow-   
   >> mobile. It compacts the snow, and fucks it's   
   >> insulating value, driving the frost down into the   
   >> ground. Same for underground water pipes.   
   >   
   > Interesting.  I know you shouldn't drive over them in the summer for   
   > different reasons, but I never thought about the insulating value   
   > being affected that much by a snowmobile - the load is distributed far   
   > more in a snowmobile and it's a much lighter load to begin with.   
      
   I guess it acts like one of those earth compactors.   
   In FL my 600 pound riding mower collapsed the drainfield.   
      
   --- SoupGate-Win32 v1.05   
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