As you have already decided on how high and wide you want it, now you should attach a purlin (the pipe that attaches to the ribs across the top of the gh and holds the structure together) 1/2 the length of your pipe ribs. It's best to do this before you try to raise the pipes. Line up the ribs to the other side of your gh, then hammer rebar on the other side of the area you're covering.
