Below are free plans from the web for building a plywood boat. over 40 free plans. boating is full of thrill and adventures, and you will be glad to make it a part of. Plywood for boat building. apa technical sheets. the following are technical data sheets from the american plywood association. plywood grading in the us is not. Intro: the bo-at single sheet plywood boat. my son and i built this simple one sheet plywood boat following the plans and sage advice provided in the following link.