I am building a wooden porch(deck) on the front of my house and have a question about the footings. I am using Lowes instructions http://www.lowes.com/cd_Build+a+Deck_578806386
and am currently digging the footings. I have bought the two Sonotubes for my 2 required posts, and they are 8"x48".
I want the center of the deck posts to be 1 ft in from the LH and RH sides of the deck and 1 ft in from the front of the deck(side opposite the house). The other side of the deck is going to be attached to the hosue using a Ledger board.
The Sonotubes get filled to the top with cement and then once the concrete sets some a J-Bolt gets put into the center of the cement. A Post Anchor then later slips over the J-Bolt and a nut secures it there. The 4x4 Post then slips into the Anchor and is secured.
What is an easy way to get the sonotubes positioned so that the center of the tubes are lined up to give me those 1 foot-from-the-edges spacing that I want? In other words since the J-Bolt is going to be centered in the cement inside the Sonotube, it needs to be lined up with those 1-foot in lines I want. Is Batterboards and string my only option?