LumberJocks

Homage @ Rietveld

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Project by KnickKnack posted 09-23-2011 07:50 PM 3199 views 6 times favorited 7 comments Add to Favorites Watch

I’ve long been fascinated by the Rietveld Joint – you have to respect a guy who has an actual joint named after him, doubly so since, in its purest form, it’s a theoretical joint you can’t even make!
The idea of using it in a tray has been bobbling around in the fuddle of my brain for quite a while, so I decided, finally, to make it.
In theory it’s all very easy – just a load of square cross section lumber joined by dowels, right? The problem that had been holding me back was how to embed the tray base within the structure – I “solved” this by making the two bottom sections slightly higher (4 mm to be precise – the width of the ply base) – everywhere you look, you see the 20mm square cross section since it’s also recessed by the 4mm into the next tier of wood.
Since the perfect Rietveld joint is technically impossible to make, I decided to go with through and through dowels everywhere – 20 in all. I could flush them, but beech dowels against pine don’t stand out very well, so I decided to make my own jatoba dowel caps – 40 of them.
I did this by putting a square offcut in the drill, and sanding, sanding some more, and then more. Once the piece is basically a cylinder it gets a lot easier – sand to 6mm diameter, saw off a ~5mm slice – repeat – 39 more times!

I’d toyed with the idea of staining the different pieces of wood in “red/blue” style colours. I even asked a question here about how I might sand after staining, but there seemed to be no good solution. The wife wanted to stain the base blue (to go with the kitchen, like that’s a good reason), but even she agreed when it was being trial fitted that it wouldn’t be right. All this was lucky, i think, it looks fine “au natural”.

Just for a change glue-up wasn’t too much of a challenge – 90° things clamp pretty well – the biggest problem was that, as seen in the last but one picture, that was all of my small clamps being used just for one end.

Pine and jatoba. Portuguese Oil finish. 50cm x 25cm x 6cm high.

This Lumberjock posting may self-destruct at any moment – comment while you can!

-- "Do not speak – unless it improves on silence." --- "Following the rules and protecting the regulations is binding oneself without rope."





7 comments so far

View TopamaxSurvivor's profile

TopamaxSurvivor

14797 posts in 2342 days


#1 posted 09-24-2011 12:03 AM

Maybe I am dense, but what is impossible about it?

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View KnickKnack's profile

KnickKnack

990 posts in 2233 days


#2 posted 09-24-2011 12:24 AM

All the dowels are supposed to be purely internal – so you can cut them all in the right place, but you can’t actually put the 3 pieces together at the same time, which you need to do.

-- "Do not speak – unless it improves on silence." --- "Following the rules and protecting the regulations is binding oneself without rope."

View TopamaxSurvivor's profile

TopamaxSurvivor

14797 posts in 2342 days


#3 posted 09-24-2011 01:04 AM

That would be beyond us mere mortals for sure! I defer to my ancestors in CT that were charged with witchcraft in the late 17th century. Maybe they or their convicted neighbors could do it ;-))

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Gary's profile

Gary

7292 posts in 2099 days


#4 posted 09-24-2011 01:39 AM

Bob, I really think the impossible thing is knowing how to pronounce it…

-- Gary, DeKalb Texas only 4 miles from the mill

View TRYPHON974's profile

TRYPHON974

74 posts in 1448 days


#5 posted 09-24-2011 06:26 AM

Intriguing joint. Here’s another method I’ve been told by a carpenter to make dowels, hit a roughly round piece of wood in a hole. The dowel won’t be perfectly straight as it will follow the wood grain,it’s even better :).

View whitewulf's profile

whitewulf

447 posts in 1603 days


#6 posted 03-08-2012 02:12 AM

A variation might be to eliminate dowels, and rebate each piece…....

-- "ButI'mMuchBetterNow"

View Jpedi's profile

Jpedi

93 posts in 726 days


#7 posted 10-11-2012 01:16 AM

Wow, I’m studying that, can’t see how it can be hard, but…... I know for certain I don’t have NEAR enough clamps!! Heh heh….

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