29 May '13, 10am

Wall section solution — to build under Zone 6 tree house on 27 steel columns #green

I have insulation and barrier questions for an unusual wall that has to enclose 13 4x4 or 5x5 steel columns on 18" piers at different elevations holding up a "tree house"? These piers/columns occur every 10 to 15 feet of exterior wall and there are another 14 piers and a CMU to deal with inside the perimeter, none of which are insulated. At the top of these steel columns are small 1/4" steel U plates holding 5"x15" wood beams. At each plate, nut to bolt thickness is 6 ¾”. We are using 2x6 framing and trying to keep the basement f-wall (up to 6' underground) around 5" by embedding steel supports anchored to footings and wood beams. The base of the f-wall under the slab would be 9"+ with a step to 5". Existing 25-year old walls above the wood beams consist of 3/4" vertical lap cedar over Tyvek over 1/2" plywood on 2x6 batt insulated walls with 975 sf of R1 to R2 glazing in 1...

Full article: http://www.greenbuildingadvisor.com/community/forum/green...

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