The following set of Adirondack chairs are what I would consider “easy to build”. These chair plans are from Lowe’s creative ideas and are a beautiful addition to any patio or yard. I love the simplicity of the design. The arms and lower runners are essentially a box with the seat being an additional box that ties them together.
I would have to say that there is a negative to this simple design in that the lower slat, or runner, is always in contact with the ground. You could have this on a patio, a deck, or in the yard and in each case, the flat runner will be trapping moisture. Cedar, redwood, or pressure treated will resist rot, but the constant contact with surface water will eventually lead to rot. If I were to build these, I would add a block under the front leg and back leg to reduce the contact. You can always replace the blocks if they rot. Better yet, use a piece of composite deck material as a small 1″ x 4″ x 4″ foot.
Good luck with your build. Click on the photo (above) for the full plans at Lowe’s.