| Project by Ryan Shervill | posted 94 days ago | 615 views | 1 time favorited | 24 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!
Ryan Shervill
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
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24 comments so far
Bigbuck
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1050 posts in 200 days
posted 94 days ago
Wow, that is awsome. Althought at 80lbs I am not so sure it need to fold, cause I sure as heck wouldn’t be moving it around very often in fear I might actually get some exercise and loose my feminine figure :).
Very nice job.
-- Glenn, New Mexico
Ryan Shervill
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199 posts in 350 days
posted 94 days ago
LOL…I know…..think of it as folding “for storage”, and not “for transport” :D
The upside is that being as the TREX is all 1” X 5 1/2”, the chair could be built from 5/4 cedar deck boards as well….and weigh around 20 lbs :D
Thanks for the compliment!
Ryan
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
kolwdwrkr
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474 posts in 127 days
posted 93 days ago
This is a cool concept and a nice looking chair. Just tell your clients they need to do 6 months of extreme weight training before they purchase it so they can tote it around. LOL. Thanks for posting.
-- ~ Inspiring those who inspire me ~
thetimberkid
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1684 posts in 240 days
posted 93 days ago
Great job!
Thanks for the post
Callum
-- Look great, get your TTK merchandise now! http://www.printfection.com/thetimberkid/ Check out my site http://thetimberkid.blogspot.com/
MsDebbieP
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12282 posts in 698 days
posted 93 days ago
sweet!!
I like the transport results as well… (still in one piece)
Awesome
-- "Functional WoodArt" by Debbie, Canada (http://www.execulink.com/~yohan)
Karson
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13585 posts in 938 days
posted 93 days ago
Great Ryan. A nice job and congratulations on the upcoming article.
-- Karson Southern Delaware karson_morrison@bigfoot.com
Ryan Shervill
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199 posts in 350 days
posted 93 days ago
Thanks everyone :)
Karson~ Thanks for the congrats, but they really arent neccessary….that’s what I do for a living :)
Ryan
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
Karson
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13585 posts in 938 days
posted 93 days ago
But no reason not be congratulated, on your profession.
-- Karson Southern Delaware karson_morrison@bigfoot.com
Ryan Shervill
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199 posts in 350 days
posted 93 days ago
LOL…good point! It IS nice to hear.
Next time I go out of the house I’m gonna start with the mailman and work outwards from there, make a few peoples day :)
Thanks Karson.
Ryan
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
scottb
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3060 posts in 864 days
posted 93 days ago
ambitious chair… I suppose with the material used and its weight it is probably the only adirondack to suffer no ill if left in place year round.
keep pushing the envelope!
-- I am always doing what I cannot do yet, in order to learn how to do it. - Pablo Picasso -- http://snbcreative.wordpress.com/
Dusty56
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1401 posts in 225 days
posted 93 days ago
hahahaa…my very first thought after seeing it was made from TREX was …that thing’s gotta weigh a ton ! I have handled way to much TREX in my career and I have to wonder if after sitting in the sun all day , can you actually sit in the chair without toasting your backside and have they improved it enough to stay smooth to the touch , rather than abrasive after some ” seasoning ”. I was routing a profile on a section of TREX to be used as a handrail on a friends deck when all of a sudden sparks were flying from my router bit …there was a piece of metal buried in the product !!! So much for my bit : (
Nice job on the chair : )
-- Dusty56@comcast.net
Dadoo
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1557 posts in 528 days
posted 92 days ago
It’ll definitely outlive it’s hardware! Nice chair Ryan! Needs an end table to compliment it now!
-- Bob Vila would be so proud of you!
Ryan Shervill
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199 posts in 350 days
posted 91 days ago
A table? Oh geeze….another 50 lbs to lug around!
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
SteveKorz
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1419 posts in 251 days
posted 91 days ago
Wow… just thinking about trying to figure out the pivot points of that chair makes my head hurt…
Great job though, it looks great!
-- As iron sharpens iron, so one man sharpens another. (Proverbs 27:17)
Mark Shymanski
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715 posts in 250 days
posted 91 days ago
“close to 50 hours of modelling and necessitating the construction of no less than four prototypes to get the telemetry correct.” Telemetry? Do you mean geometry?
-- ....next big purchase is wood for the next project, Mark
Ryan Shervill
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199 posts in 350 days
posted 91 days ago
Hi Mark…..well, in the context I used it, either would work I guess.
“telemetry” might not be the best word to describe it…but it was easier than saying “Coplanar mechanical interaction” Although truth be told, once the “telemetry” ( I used this to describe arcs of movement across the three seperate planes, all pieces “communicating” (hence the telemetry part) with each other to affect the others course of movement) was established, the geometry was pretty much self dicatating.
Translation: How the heck do I get this chair to pivot in such a way that it folds flat into itself, without hitting anything, and yet maintains the proper angles once erected?
Essentially: The angles of the arms dicatate the angle of the seat which dicates the angle of the backrest which dicates the angle of the front legs which dicatates the angle of the struts which dictates the stationary angle on the rockers…...and you can switch those into any order and get the same result :) Every component is dependant on another component to dictate it’s positioning.
Because of the three different pivot angles, and the differences between seat, back, and arm angles, yet having to have them all work together to pivot to a final angle near 90 (or 0 depending on which way the chair is standing :) ) so they would all lie flat was…well…..”challenging” :)
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
Don Kondra
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51 posts in 423 days
posted 90 days ago
LOL
That’s pretty sharp for first thing in the morning :)
Cheers, Don
-- Don Kondra - Furniture Designer/Maker
Davesfunwoodworking
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231 posts in 412 days
posted 90 days ago
Can you tell me what part of this chair is wood? Its a great looking chair. I would have to say getting all of it to fit just right so that you can fold it up must have taken a bit of work. The chair looks good. I don’t think I would want to pack it to far from home however. Great job.
-- Davesfunwoodworking
Ryan Shervill
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199 posts in 350 days
posted 90 days ago
Thanks Guys.
Dave~The wood is in the hinges!
The hinges I used are Roto-Hinge pivot hinges. They are made of two maple rounds with a steel pin running through the centers. Gorilla Glue was the only adhesive I could find that would bond the wood to the composite…and I tried just about everything!
Ryan
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
Napaman
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2092 posts in 614 days
posted 90 days ago
soooooo coool….congrats on such a wonderful achievement…
-- Matt, Napa, CA...119 days to sanity...
Mark Shymanski
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715 posts in 250 days
posted 89 days ago
telemetry (uncountable)
1. (applied sciences) the science, and associated technology, of the automatic recording and transmission of data from a remote source to a receiving station for analysis
Geometry (Greek γεωμετρία; geo = earth, metria = measure) is a part of mathematics concerned with questions of size, shape, and relative position of figures and with properties of space. Geometry is one of the oldest sciences. Initially a body of practical knowledge concerning lengths, areas, and volumes, in the third century B.C., ...
Both of the above definitions are from Wikipedia but I think others would substantially agree. Canadian Home Workshop is one of the magazines that got me started in woodworking and it concerns me that one of its staff would choose to obfuscate their communication instead of using commonly accepted terms that clearly , and more precisely (in my humble opinion) communicate the concepts under discussion. Is it really coplanar mechanical interaction or several planes of motion intersecting… clarity is critical and adopting new definitions for words does not help clarify a already unclear communication.
Don’t get me wrong Ryan I think it is a great chair and a great demo of what you were trying to do with the composites, it is just that re-defining terms to poorly (IMHO) communicate a concept when a term that more clearly communicates it is already extant concerns and irks me.
I’ll get off my soapbox and try and wind down after my 36 hour shift here…like my daughter says “Daddy gets cranky when he is tired”
-- ....next big purchase is wood for the next project, Mark
Ryan Shervill
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199 posts in 350 days
posted 89 days ago
LOL….see, in the big picture, well…it really doesn’t matter. The article is written with pattern routing templates …no methematical terminology involved :).
Regardless, the term was used as it applies to dependant intrerelated mechanicals….more about how intersecting objects move both together and seperately, and their effect therin, as opposed to fixed continums (ie: geometry) but I digress.
Is it really coplanar mechanical interaction or several planes of motion intersecting…
Well, if one plane wasn’t directly effective on the second, you would be correct. However, as the pieces share a physical connection, and movement on one mechanical plane directly dictates the arc of movement on the other (offset rear pivot) it is, in fact, mechanical interaction
Anyway, my university/engineering days are far behind me, and my head is beginning to hurt :)
Thanks for the compliment on the chair, and our magazine.
Cheers,
Ryan Shervill
-- If you can't set a good example, at least serve as a horrible warning... www.rarewoodcreations.com
MsDebbieP
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12282 posts in 698 days
posted 89 days ago
my head is spinning… not sure what the correct term for that is! haha
-- "Functional WoodArt" by Debbie, Canada (http://www.execulink.com/~yohan)
Mark Shymanski
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715 posts in 250 days
posted 89 days ago
vertigo? ;-) Now I am going to bed… G’night :-)
-- ....next big purchase is wood for the next project, Mark