Dog Pee Corrosion

Topic: 
Structural Issues
Question: 

George:

A nice couple from Ballard called you the other day with a question concerning the structure of their home. You were kind enough to give them my name and I did respond and I'd like to thank you very much for this referral. This gives me an opportunity to tell you about something that may be a bit off the beaten path of the typical home inspection problem but one day you might make use of the following information.

[ for full effect, read with sense of great drama ]

My discovery comes roundabout not from the couple above but from my own home. A while back we remodeled parts of our home including replacing the posts and brackets supporting the carport which had taken on quite a sag at one end. There had been some earth settlement at that corner but I was also concerned about one particular 4x4 carport bracket (steel tube type) which had rusted so deeply as to be almost cut in half. The rust was at midpoint of the exposed column, not right