
Can I notch-mount a 2x8 on both sides of a 6x6?
I want to notch mount the 6x6 posts and install two 2x8 secondary beams inside the notches. Is this too dangerous to the structural integrity of the posts? In particular, the rear posts worry me as they will have 14" of post above the notching.
I was planning to througbolt each secondary beam to the post with two bolts, above/below. Potentially recessing the bolt head and using a Simpson strong tie APT6 overtop the bolt as well.
The main beams will be face-mounted instead of notched. I should also mention this is for a lean-to pergola, but I'm struggling to get any input on this design choice and was hoping someone here could give me an informed opinion.