Started by ChugiakTinkerer, January 20, 2016, 01:21:07 AM
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Quote from: ChugiakTinkerer on January 20, 2016, 10:24:43 AMI'm going through that same process myself. Trying to think things through too far ahead of time can get me wrapped up in minutiae though. Was pondering last night about how to provide light and power. Originally I was thinking about DC lights, like using RV fixtures. Then I realized that AC wiring and fixtures are a lot more available and affordable. With a small capable inverter like the Morningstar SureSine 300 I can cover most of my needs and save the heavy stuff for the generator. A big 105 amp-hour battery or two to store energy and a couple solar panels for about 400 watts is what I'm thinking. Just starting to read up on this stuff but one suggestion was to get everything else working before you consider wind. It's typically too expensive and unreliable for most users.
Quote from: ChugiakTinkerer on January 21, 2016, 05:00:22 AMThe three biggest costs I've come up with are the foundation, the roof, and the stove & pipe. Three places where it pays to do it right.Sent from my HTC One using Tapatalk
Load designMain floor, 16x28 (448 s.f.), dead load 15 psf, live load 40 psf = 24,640 lbsLoft floor, 16x19 (304 sf), dead load 15 psf, live load 40 psf = 16,720 lbsRoof, 20x44 (880 sf), dead load 20 psf, live load 20 psf, snow load 70 psf = 96,800 lbsDecks, 360 sf, dead load 10 psf, live load 40 psf = 18,000 lbsTotal load = 156,160 lbsPadsSoils may not be capable of supporting greater then 1500 psfDesign load of 156,160 lbs requires foundation footprint of 105 s.f.Treated timber pads of 24" x 18" yield 3 sf of supporting area. This is extended by depth of compacted crushed gravelA 36" x 30" crushed gravel bed 6" deep provides 7.5 sf of supporting material.A minimum of 14 pads are required to support the structure.PostsAssuming a compressive strength perpendicular to grain of 335 psi, 6x6 horizontal pad timber can withstand 12,000 lbsAssuming a compressive strength parallel to grain of 525 psi, 6x6 vertical post can withstand 18,900 lbsGirdersA constructed beam of dimensional lumber must be fastened in accordance with R602.3(1)Center beam is bearing load transmitted through the interior support timbersPer R502.5(1), 70 psf snow load, a beam of 4 2x10 can support a span of 7' 7"Posts under main floor placed 7' on center have maximum span of 6' 6"With additional post and pad under interior load points, total of 23 postsFloorsMain floor joist span of 7' 3"Per R502.3.1(2) with 20 psf dead load, #2 or better, 2x8 on 24" allows span of 9' 3"Blocking at center beam and along header joistsExtra blocking at load bearing wall, under wood stoveWallsPer R602.3(5) for bearing walls supporting roof and a floor, 2x6 on 24"Jack studs under interior timber and at gables under ridge beamDoor and window headers 2x12 sandwich with foam core
Quote from: Don_P on January 23, 2016, 07:52:41 PM...Being on unbraced piers there is nothing keeping them vertical, frost and seismic issues, looks like the wind has quite a fetch as well. Find a way of doing more than the 2x brace slapped on as an afterthought. I'd be more tempted to build a crib of timbers on a leveled gravel base but local wisdom rules in situations like this.