i build this rocking chair along with the “japanese rocking chair” 10 years ago when i was a design student in israel in a chairs design course. i think its “maple” . i gave it to a good friend of mine (who is also a crpenter) as a wedding gift but he didnt keep it so well as he keep his wife .. . i try to give this chair a bone structure look lik a Skeleton . it hold itself only by its joints , i didnt us any glue and it can be Factorize. i dont us plans when i do it , its more like intuition , step by step.