Author Topic: Two more Z-chairs  (Read 4287 times)

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Offline Rocker

  • Posts: 63
  • Furniture maker, Queensland, Australia
    • Build your own rocking chair
Two more Z-chairs
« on: August 01, 2007, 02:25 PM »
At the risk of harping on about Z-chairs, here are a couple more that I have built recently.

The first is a carver, designed to match my zigzag dining chair. Its miters are 27.5?, giving 55? joints. They are reinforced by a single through 9.5 x 32 x 65 mm tenon. The tenon's mortices were routed on my mortising jig, using a 3/8" spiral bit with a 2" cutting length. The chair's seat/back assembly is supported by the upper of two stetchers, which join the two Z-assemblies. The back's stiles are screwed and dowelled to the rear end of the arms.

The second chair, designed for admiring the view from your penthouse suite in the Trump tower  :) , has
50? miters joining the feet to the legs, and 40? miters joining the legs to the arms, so that the chair reclines, with its seat at 10? to the horizontal. Its miters are reinforced by three locking tenons, in the same way as the original Zigzag dining chair. This chair is made of Rose Gum, with Jarrah laminated backslats.

David
Free downloadable plans and articles on jigs and furniture on my blog:
http://rockerswoodwork.blogspot.com/

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Offline John Stegall

  • Posts: 66
  • Full time teacher, part-time home repairs;
Re: Two more Z-chairs
« Reply #1 on: August 16, 2007, 12:30 PM »
Fine work as usual David.
John

Offline Dave Ronyak

  • Posts: 2234
  • Flyin' from NE Ohio
Re: Two more Z-chairs
« Reply #2 on: August 16, 2007, 01:13 PM »
Rocker,

Awesome chairs.  Any issues if a person sitting in one decides to lean back so that the front of the bottom runner members are lifted off the floor?  That would appear to put several members under high stress.  Selling any to BMW and Nissan "Z" car owners?

Dave R.
Friends, family and Festools make for a good retirement.  PCs...I'm not so sure.

Offline Rocker

  • Posts: 63
  • Furniture maker, Queensland, Australia
    • Build your own rocking chair
Re: Two more Z-chairs
« Reply #3 on: August 16, 2007, 05:49 PM »
Dave,

I have tried leaning back on the chairs, and they are able to withstand the stresses without any problems. The fact that the legs are dowelled to the seat side-rails, and the arms are dowelled to the back stiles, means that the seat/back assembly helps to resist the forces that are applied to the miter joint at the top of the leg. I am very confident that the chairs are easily strong enough to withstand normal use and abuse.

I have not attempted to sell any of my Z-chairs; I make them for myself and my relations.

By the way, this Forum's software seems to misinterpret the ASCII code for a degree sign, so that it is coming out as a question mark instead.

David
Free downloadable plans and articles on jigs and furniture on my blog:
http://rockerswoodwork.blogspot.com/

Offline Dave Ronyak

  • Posts: 2234
  • Flyin' from NE Ohio
Re: Two more Z-chairs
« Reply #4 on: August 17, 2007, 02:48 PM »
Rocker,

Your "leaning back" test is good enough for me.  Good point about the "Z" bar diagonal being pinned to the side rails of the seat.  That reduces the moment arm length.  I think you have invented the "Rocker Signature" chair.

Dave R.
Friends, family and Festools make for a good retirement.  PCs...I'm not so sure.

Offline woodshopdemos

  • Inactive Member
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  • Posts: 759
    • Woodshop Demos - 1400 pages of how-to
Re: Two more Z-chairs
« Reply #5 on: August 18, 2007, 11:25 AM »
not attempted to sell any of my Z-chairs; I make them for myself and my relations.

By the way, this Forum's software seems to misinterpret the ASCII code for a degree sign, so that it is coming out as a question mark instead.

David

Yes, I couldnt get ASCII to work. But "sup" does.

{sup]o[/sup}   brackets changed so example would show.


125o
« Last Edit: August 18, 2007, 11:27 AM by woodshopdemos »
In memory of John Lucas (1937 - 2010)

Offline Rocker

  • Posts: 63
  • Furniture maker, Queensland, Australia
    • Build your own rocking chair
Re: Two more Z-chairs
« Reply #6 on: August 18, 2007, 04:41 PM »
Thanks for that :)

David
Free downloadable plans and articles on jigs and furniture on my blog:
http://rockerswoodwork.blogspot.com/