What tests? Quote:
"What we hear most – and agree with - is that biscuits joints serve best as a quick and easy way to keep glue-up parts in alignment, and that they add appreciable pull-apart to strength joints that would be otherwise too weak to stand on their own – like butt joints and miter joints. Doweled joints, on the other hand, are stronger – especially when it comes to shear strength – but usually take longer to make. This popular conclusion also echoes the findings of the “Wood Joint Torture Test”, published in the November, 2006 issue of Wood magazine, where dowels and biscuits were actually tested against one another under stress in a variety of joints."
From here: Doweling vs. Biscuit Joints / Rockler How-to
Theo- I have to agree with you Theo.
My real world experience, seeing what lasts and fails at customers residences... and have to take apart, break down, rebuild, repair and sometimes to destroy things with different joining techniques... Just don't show biscuit joining as being better/stronger than dowels.
When I started, years ago when I was an apprentice... and many years later as a Master Carpenter training apprentices... one thing we did do was have them practice a joining techniques, then have them make it fail. Doing that, you can see for yourself what works and doesn't. That sort of breaks the molds on a lot of myths. Also gives someone the practice to make things better and stronger.
I can't say that was or is universal, but it taught me allot about how things really worked. (or not)
I know Jerry just got a new doweling jig and has been practicing. I think that would do well.
I know he also has a new miter-lock joint bit, which would do well.
If he had a mind to, he could combine using both... Or do a miter-lock with adding contrasting colored dovetail keys... (Like I mentioned before.) I know he is aching to practice with that miter-lock bit. Harry has done a few threads on spline key jigs, which could be converted easily to cutting dovetail keys... And Jerry does have an Incra system. You want to practice on things with higher end furnishing... And other higher skills...
*** Like I started getting into, sometimes my customers see or know something is built a certain way, and they willing to pay extra for that. I have customer that looks for dovetails and M&T joiining. They are willing to pay extar to have that. Most M&T joining, you do not see... But if they can see dovetails... they take interest. It is distincintive and shows a higher skill level. Dovetails keys are done into mitered joints... and what better than to add them to a good-miter lock joint, eh?
I've done a lot of M&T joining. I've only done 2 end-of-bed blanket chest in what could be considered true Mortise an tenon joinery. That is one furnishing that you just don't commonly think of M&T joinery in it's construction. Those two were raised panel chests, with the frames were rail and stile with M&T joinery.
Spline joinery is more common in the higher end chests. Some others that could have remotely or absractly been considered as M&T, but were still more along the lines of blind dados or partial splines... just throwing out ideas...