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The spread sheet idea is a excelent one by all means do so. Many folks get a good ripping by not being well informed and making generalizations. Be sure to get quotes including a time table for the quoted price. I build alot of buildings and do the overbuild thing, Never had someone call me up and chew me out for overbuilding. Can't afford to do it right the first time, then the second time you sure can. Some questions come to mind when suggesting rafter spacing etc. Will it ever be insulated and heated, will birds become a problem. Is there a min. head room needed, will a ceiling ever be in store? Is tearing down a local building for the materials a option? Does someone in your area have used lumber? Think over the lean to part. Many companies when building on a lower addition especialy on the gable end-(making the building longer) at the first 10 foot interval we add a double rafter as snow drifts usually end up there. In our area 2x4 on top of rafters are usually 24 inches on center, (layed flat) max. rafter spacing 4 foot on center. If you put them on edge you can almost double that number. I get alot of questions about what's it gona cost for a shed so big by so big. My answer is if I could quote it to you off the top of my head without crunching numbers and knowing exactly where every door---and everything prefered is listed-- you best not hire me because I will pad it to cover the extras. I would strongly suggest talking to your local lumber yard for there recomandations in your area. I do know a big mistake made by do it yourselfers is they think 1 x 4 lumber is cheaper than 2 x 4 lumber. Most times it is not, and if so very little differance. Dave NE IA
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