Re: [MedievalSawdust] me first Bog Chair
- Don't know about Bog chairs, but I've used 1 x 12 pine for bookcases with no problems yet. A lot depends not only on the weight, but the span. For books the longest unsupported span is about 32". If I was considering an entertainment center with an older tube tv (and I am), I would think about some type of cross-brace in the center. Just a thought.
Conal O'hAirt Jim Hart <baronconal@...> wrote:Subject: [MedievalSawdust] me first Bog Chair
So my very first woodworking project for the SCA was a personal Bog
Chair/Stargazer chair. I know, not really period. With the first one
in splinters under me I soon realized that (1" x 10") pine boards
wouldn't even support even my lithe 180 lbs frame. Next I tried Poplar
wood. That lasted about 3 or 4 tries before collapsing. What, dear
folk, am I doing wrong?
try a pine 2x12..... Once you get to that size boards the quality of the wood goes up and you get yellow pine in stead of white pine or fir. MUCH stronger....
Aude Aliquid Dignum
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- Rebekah d'Avignon <rebekahdavignon@...> wrote:Don't know about Bog chairs, but I've used 1 x 12 pine for bookcases with no problems yet. A lot depends not only on the weight, but the span. For books the longest unsupported span is about 32". If I was considering an entertainment center with an older tube tv (and I am), I would think about some type of cross-brace in the center. Just a thought..COMMENTI was taught that, for "library" shelves, one should calculate for a minimum of 11lbs weight per foot run of shelf to carry 9.5" x 6.5" format books., and size the timber thickness accordingly.1" [nominal] x 8"/9" (nominal) over a 32" span will just-about do it spaced to carry 9.5" x 6.5" format books. For larger formats - say 10" x 12" - I routinely use 1.25" x 12" (nominal) knot-free pine. Or high-grade multi-Ply, edged.I haven't had any of my Customers complain this wasn't working, - over a near-40-year period.What I'd use for a "star-gazer chair" - if a Customer asked for one and I couldn't convince them to choose another design, instead, - I don't know. It's a non-SCA-period and "yukky" design, and there are flat-pack designs out there with a far-more "period" feel to them. Glastonbury chairs are nice, and not too complex to make. Savonarola chairs need a lot of prep-work to get all the jigs and dimensions right, - and I wouldn't do all that just to make one. A short production run for 4 or more units would make it worthwhile, though.But if I really needed to make a "stargazer chair", then I'd probably use 1.25" (actual) thick Ash or White Oak, Certainly not the quality of Pine I can buy off-the-shelf at my local [and only] Island Timber Supplier.For an entertainment centre, I'd look carefully at the TV-weight, and the width of the sub-units - video, satellite box, dvd player, &c, that one might wish to place underneath the TV, and set my load-bearing uprights as close as possible to each-other within the "carcass", allowing only just-enough clearance to slip the sub-units into place. Always assuming, of course, that my Customer couldn't afford a light-weight Plasma widescreen TV.Julian,isolated in "old" Jersey.
He’s right; pine and poplar are both soft woods. (You’ll notice that I don’t say “softwoods.”) They’re not strong enough to hold someone your size in a Bog Chair. In pine you will need between 1 & ½” and 2” thick. Poplar might
From: email@example.com [mailto: firstname.lastname@example.org ] On Behalf Of Johann Friedrich
Sent: Thursday, March 15, 2007 8:25 PM
Subject: Re: [MedievalSawdust] me first Bog Chair
I would suggest using 2" material rather than 1". The thinner material
just can't handle the stresses in that design. I’ve had success with 1 & ¼” wood using north American white oak.
So either go with thicker wood or a hardwood like oak or ash.
On Fri, 16 Mar 2007, Crimthann wrote:
> So my very first woodworking project for the SCA was a personal Bog
> Chair/Stargazer chair. I know, not really period. With the first one
> in splinters under me I soon realized that (1" x 10") pine boards
> wouldn't even support even my lithe 180 lbs frame. Next I tried Poplar
> wood. That lasted about 3 or 4 tries before collapsing. What, dear
> folk, am I doing wrong?
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