I've got an old post and beam that we're are installing a new post in. The two beams above lap over the main beam and it was suggested that we install a capital block under the lapped joints that will then be above the new post.
I've tried to research capital blocks for ideas, but only found one reference in an old timber frame article.
My questions: how thick should the capital be? And are there any images out there of examples?

Thanks in advance,
Chris