Remember that Omran's design is built for KY snowloads -- along the lake in WI you are almost certainly going to need a lot stronger construction, especially if you want such little slope on your roof.
I don't have a current picture of mine (and it's snowing right now, so it will have to wait
) but here is a pic of the posts and beams, before I put the purlins up.
Note that this is a slightly odd design, as it has the beams running shortwise and 2x6's on edge as the purlins. The posts are p/t 4x4s but are effectively built up to 4x7s because I ran the thingies that prop the beam up all the way down to the ground, for strength and also to give a flat surface to attach the fencing to.
However the more usual design is with beams along the long edges, 2xsomethign rafters, and 2x4 purlins (flatwise) to nail the roofing into. What I'm doing is from an older Canada Plan Series plan, modified for dimensions etc, just because I've built sheds the other way and was curious to try it this way
I'm serious about snow load... especially with a flattish roof, you can get into real problems that way real fast, and personally I believe that given the work and expense it takes to build the thing in the first place, it is HEAVILY worth slightly OVERbuilding it. (And you know, there will come a day eventually when you have 2' of wet snow and then an inch of rain...)
Diagonal bracing you don't need plans for. Just, you know, do it
Use 2x6 lumber, across a reasonably wide span (i.e. not just cutesy little 2' long corner braces). And stick 'em in wherever necessary/convenient, such that no matter which way or from what side the structure was pushed, there'd be diagonal braces resisting it. The braces *can* be mortised in, but normal people just nail 'em on good with blunted 4" spiral nails, possibly predrilling a very fine half-depth pilot hole first to discourage the wood from splitting.
If you want to see examples of diagonal bracing, go find a book on building decks, and look at where they are talking about TALL decks, like on 8-15' high posts. They will show you various diagonal bracing schemes.
(e.t.a - here is a pic of my big horse shed, as an example of one common diagonal-bracing scheme (although if it weren't protected from our worst winds by the barn, and if I were less of a lazybutt, it could use more diagonal bracing, especially on the short sides).
Basically look at the diagonal things up towards the top. That is one good general-purpose scheme you could use for your run.)
Good luck, have fun, respect the weight of snow
,
Pat
