Corner Joint for Timber Structure

[MishaZ]

Looking to build a 14x14 timber gazebo structure with mortise and tenon joinery.  Will be using Cypress wood.  Will have hip roof.  My posts are 6x6, tie beams are 6x8 and knee braces 4x6.

This is my first rodeo.  Got a number of books on the subject.  Looking for advice on the best corner joint you would suggest.  Bellow is one I'm currently considering that came from Historic America Timber Joinery.



 

[Jim_Rogers]

That's the one I would use.

Jim Rogers

[wojotf]

[Ljohnsaw]

Wojotf,
Is that upside down?  With the mortise only in the one beam, what holds the other beam in place?

[MishaZ]

Wojotf, that looks like Sill and Floor Joint to me.  Unless it is upside down as ljohnsaw stated. 

[MishaZ]

another option

[MishaZ]

Any more input?

[GRadice]

Do you want both tie beams to stop at the outside corner, as you show? Or can one of them project beyond? If one projects beyond that opens up more and maybe stronger possibilities.

[Don P]

Similar to those last sketches, not much of a tenon.
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[MishaZ]

Do you want both tie beams to stop at the outside corner, as you show? Or can one of them project beyond? If one projects beyond that opens up more and maybe stronger possibilities.

I'm planning to do a hip roof, so can't really have any overhang.

[GRadice]

I'm not sure that is correct. If the eaves are wide enough there is plenty of room for an overhang. This is a standard hip roof framing in Japan, for example.  I admit the joinery is a little complicated and you might not want wide eaves so this might not help your situation.



 

[MishaZ]

I'm not sure that is correct. If the eaves are wide enough there is plenty of room for an overhang. This is a standard hip roof framing in Japan, for example.  I admit the joinery is a little complicated and you might not want wide eaves so this might not help your situation.

It does look a bit more complicated.  Assuming I do extend my beam, what would the joint look like that you mention is possibly stronger?

[GRadice]

Here are a couple of versions. In the first one, the mortise for a tenon on the top of a post has been omitted. The two tie beams are joined by a through wedged tenon. In the second, the tie beams are lapped.