Thread: Rocker's Joint Testing - the Movie

Very impressive!
Love your scientific approach

Originally Posted by Fencepost2

Very impressive!
Love your scientific approach

I think we should call him Dr Rocker from now on!

Cheers,

P

Many thanks to Bitingmidge for his expertise in taking the pictures of the testing of the mitre joints (despite my best efforts to block his view), in downloading the video onto his computer, and editing it.

I am happy to report that my heart now seems to be in excellent shape, now that the 30 mm hole between its atria has been patched, and that, a month after my open-heart surgery, I was fit enough to drive to the home of the Bitingmidge to learn some of the wonders of i-Movie.

Rocker

Glad to see you are on the mend Rocker and welcome to the zipper and (I assume) CABG club.
Wonderful demo!! What was the best joint construction with what glue?
Just a point on safety; the G clamp should have been the other way up.

Originally Posted by artme

Just a point on safety; the G clamp should have been the other way up.

I cringe now and I cringed then when I see that deck-shoe clad foot and bare shins about to get impaled on the broken chair!

The guys got away with it, in the way we've all been getting away things for centuries before WH&S was invented, but I wouldn't suggest anyone else does it!

P

I have just realized that there is a typo in the video. The weight at which the blackwood zigzag frame failed was 365 kg, not 265 kg. This will be corrected in the next day or two.

Frame-by-frame examination of the video of the zigzag frame indicated that it was the side where the glue failed which gave way before the other side where the wood failed. I believe that the glue failure was probably because the splines were slightly too thick, so that, when they were driven home into the kerfs, the joint was starved of glue.

Rocker

Originally Posted by artme

What was the best joint construction with what glue?

Artme,

I believe that the strongest mitre joint is one that is reinforced by twin splines glued in place with epoxy glue, since this reinforcement method has the largest glue area. However, joints reinforced by a single large through tenon, or by three floating tenons, are easily strong enough to be used safely in zigzag chairs, so long as they are glued with epoxy.

Rocker

I'd like to see the guys balance on your Z rocker like that!

Do you realise they only show you the clown’s legs. The test is a bit dodgy I think.





Just stirring

They weren't real clowns, they were leg models

OR they are all jockeys. 25kg each.

Link updated now with the correct weight!

Wongo, all were indeed 25 kg, except for some bloke called "Neil" who Teejay suggested would break the thing if he got on.

That's what happened!

P

Fantastic!!! Brilliant!! Love seeing the testing put together into a rivetting video.


Even better news is that you are recovering quickly Rocker


Cheers
Wendy

Terrific! Hope you are feeling better Rocker.

Loved the scientific approach - easily replicated - could even hear the circus band in the background.

Only about the third look I have had at "the tube" - I can now see greater value in it.

Regards,
Bob