Hawkeye,
Danz's directions are really good for the bridge. I had some old 12 foot 2x8's sitting around from some decking framing, so I used them for everything on the bridge. Water drains through that area of the back yard and it gets muddy frequently, so I thought the bridge would keep a little mud out of the house. I kept the bottom of the supports straight since there is enough clearance with the slope that the bridge crosses.
Danz's directions are really good for the bridge. I had some old 12 foot 2x8's sitting around from some decking framing, so I used them for everything on the bridge. Water drains through that area of the back yard and it gets muddy frequently, so I thought the bridge would keep a little mud out of the house. I kept the bottom of the supports straight since there is enough clearance with the slope that the bridge crosses.