Easy Adirondack Chair Plans - How to Build Adirondack Chairs . Mar 21, 2017 . These Adirondack chair plans will help you build an outdoor furniture set that becomes the centerpiece of your backyard. It's a good thing that so . Although there are a few angles and curves to cut, there's no fancy joinery -- everything's held together with corrosion-resistant deck screws. We used cedar for..