|Project by Ryan Shervill||posted 08-30-2008 05:19 PM||3253 views||4 times favorited||25 comments|
Here it is, what I believe to be the worlds first Folding AND rocking Adirondack chair, and the first one built of TREX composite.
Built as a project article for Canadian Home Workshop Magazine (Full story/plans will be published in summer 2009), this chair was an engineering nightmare, requiring close to 50 hours of modelling and necessitating the construction of no less than four prototypes to get the telemetry correct. It has 12 pivot points with blind pivots, and uses two 3/4” copper pipes and 5/16” threaded rod as a torsion bar set-up to make the chair ridgid and to serve as the locking bar The rear pipe is captured in the runner base, the front locks into cutouts in the front legs when the chair opens creating constant tension on the frame of the chair and making everything super-rigid when open. The more weight applied to the chair, the stronger it gets!
The chair is constructed of TREX, copper pipe, and yes, as per the rules,...even wood, all bonded with Gorilla Glue. The pivot hinges are all “roto-hinges” from Lee Valley Tools, and they are maple pivots on a metal stem. These roto hinges were the very reason I chose Gorilla Glue to assemble the chair…I couldn’t find any adhesives that would bond the wood with the composite, so I gave the GG a try and it seems to work and is holding up fine. Considering this chair weighs over 80 (yes eighty) lbs and has been shipped for photography from Penetanguishene to Toronto to Manatoulin Island to Toronto and then back to Penetanguishene and stayed in one piece, I’d say that is a testimonial to the glue’s bond.
Thanks for looking!
-- Want to see me completely transform a house? Look here: http://forum.canadianwoodworking.com/showthread.php?41055