It's probably nailed or screwed through the sole plate normally. It would fail easily if it weren't for the other walls keeping it square. A mortice & tenon would probably be over the top! Coach bolts would be another option.
@Airhead started
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It's probably nailed or screwed through the sole plate normally. It would fail easily if it weren't for the other walls keeping it square. A mortice & tenon would probably be over the top! Coach bolts would be another option.