hand done m/t's

[Anonymous]

...

I see there is a picture of a 4 shoulder tenon. In fact this is a very unusual tenon and I can't think of a situation where one would ever want to use one. No doubt someone will put me right on this!
...

Jacob,

It is my four shoulder tenon, I guess. I won't correct you, why should I? I'm teacher, but that's no reason. :lol: Indeed I come to do tenons scarcely and I wanted to go sure hiding my mistakes. Indeed if I do just two shoulders, the joint is stronger, because wider, but any mishaps in the mortise will show up. So, that's the reason. For me professionals with a lot of everyday practice can do that, for me it is current job to do four shoulders...

Have a nice evening,

Yes I see the point. I suppose the extra bit of shoulder need only be a few mm to cover the mortice.

One thing that has always crossed my minds with mortice and tenon joinery is the location of the tenon.
In every photo I remember seeing of a tenon it has always been in the centre of the thickness.
does anyone ever put the tenon more to the front or back of a joint?

Yes often as the tenon usually has to line up with a rebate (traditional windows) or a slot (traditional doors) and other details - so is rarely exactly central. Depends on what you are making.


cheers
Jacob

 

[engineer one]

often from what i have seen, certain chairs are designed with the mortices offset.

i think it has to do with the twisting moment.
paul :wink: