Water damage on my 1920s house has caused total destruction of several cedar posts under my house. I want to replace them but cannot find a detailed explanation of how to do it anywhere! I have an engineering degree and spent much of my youth working on a farm so I can usually do most mechanical tasks IF I have good instructions. I would rather preserve the historical nature of the house (as we have on almost everything else) and prefer not to use non-wooden posts but I am open to seeing other methods of repair, such as concrete. Specifically, but not limited to, I need to know how deep to dig, what to put at the bottom to prevent sinking, jacking hints, how to put the post into the hole so that it is the right height, etc. Details, please! The house has moved in the past seven years no doubt partially because of the loss of support of water damaged posts. I have done what I can to prevent water from getting to the posts. House info: 1225 sq. ft. single story located in San Antonio in Blackland prairie soil (black dirt and some clay) with 18-24" crawl space. Thanks!