I have an existing third floor deck (10'x40'). It is supported by a
6"x12" beam resting on 18' tall 8"x8" posts.My question: I want to install a second floor deck, underneath the existing deck, by tying into the existing posts. Which is the best way? One contractor recommended notching into the existing posts and inserting 4x12 beams. This seems like more work and also means cutting halfway into the post and weakening it. Another contractor said to tie into the post with custom made hardware or maybe a Simpson connector. This method seems simpler, but will the ties support the weight of a deck and people?
I haven't seen either method in any of the how-to books. They always show the beam resting on top of the post.
Thanks, Karamo