I started by drawing out some basic sketches of what I thought would be a cool look and worked out some basic engineering ideas. Our idea was to capitalize on the standard sizes of decking/treated lumber available to minimize waste. We also designed the playground so that all activities could be watched from the back porch of the house (swings, slide, entrance, etc.)
Step 1: Layout
After placing the posts in the holes we leveled the frame and attached them together using lag screws. Make sure you drill pilot holes to guide your lag screws and ensure the frame is attached level, square, and securely.
We then poured quickcrete around the posts.