here's how I built mine
6'x8'--on 2x6 runners floor joists are 2x4, 16" on center
Single pitch roof: 7' in front 6' in back
2x2 upright stud frame 2' on center luan skinned
Here's the kicker:
Chop that baby at 4' high
now you have sections that bolt together (2x2 meets 2x2--carriage bolt and nut through each framed division) at 4' height and each corner (upper and lower sections)
roof: 2, 6'x4' sections on 2x2 square frame--supported by a pair of 2x2's that run the length screwed to ends--rigid foam held in place by those 2x2's in the ceiling
Front is the only different part--2 3'x7' high sections either side of a 7'x2' door
45 degree corner braces all around and at ceiling (compound miter saw helps w/angles)
Goes together at access in about 45 min w/3 guys and can be towed by snowmobile/atv/car (if enough ice)
rigid foam fits nicely in framed sections and propane keeps it toasty
the real bonus:
FITS IN MY SUBURBAN!!!!!!
cuz i don't have a trailer
p.s. I scavenged all matl's and paid under $ 50.00 for the whole thing--I was amazed at what I could get my hands on at job sites
good luck and Post a pic when you're done
Here's some pics of mine added 2/10/07 with the "chop"