Thanks guys for the support.
All limber is band saw milled and true to size: a full 2"x6", 2"x4", 2"x8" etc.
The posts are a full 4"x4". We air nailed together to hold and I re-spiked with longer galvanized spikes/nails.
The plates are air nailed and spiked to posts. Personally I don't trust air nails(3.5") with true dimensional lumber - but, they do help to put things together fast or hold in place when you don't have enough hands to hold the lumber, nail and hammer at the same time! There are/will be double 2x6 on either side of the 4x4 posts for strength - at the base, mid section and top plates. I tend to over build things.
We made one bay wall on the ground - squared and trued angles and built two more on top using the first one as a template - this went together fast. We then placed in position and leveled & trued everything with bracing before assembling. We checked building for square front to back and diagonally - we were within an eight of an inch!!
PA... somewhere on TBN some one did this shelf thing. The idea is to place the rake and back blade on the shelf with forks. The shelf will be 2x10" x10' joists/span with angle bracing on the sides with 2x4 as decking with 1" spacing between deck boards. Hopefully this will be strong enough to hold the rake and blade - they will be in separate bays not together on one shelf. They will be high enough to allow the bush hog to be backed in underneath. The snow blower will sit in front in the other bay.
toad and 2many are correct... when we first got it up I said this is huge... now I am not so sure!
The building will be sitting on a large slate rock dry stacked foundation. I try to replicate when possible older building techniques around my 200 year farm. There are a couple of larger barns down the road that are like this and believe it or not they are square and true after a hundred plus years.
I will remove the grass and lay landscape fabric/barrier and level with class A rock.
I use class A because I have extra sitting around.
Hopefully we will get the roof on. I have a pile of 3/4"x7.5" T&G left over from the horse barn build. I know there is enough for the roof and a wall... not sure if there is enough to do the whole building. Door thoughts: I am thinking 2x4 frame with corrugated plastic panels. this will let in light plus warmth/heat to keep things dry... any thoughts on this would be appreciated.
lloyd