I wish I could find the pictures, but, we rebuilt a 3 story apartment complex, that had damage like that after only 5 years. It kept me busy for 2 years. In that case, it was all in the construction details, or lack of.
I caution people against painting these structures, but they sometimes just want that look. The scary thing is that the paint seems to hide a lot of serious damage, before it's too late.
This job also had a lot of notches, where water sits. You guys that notch your posts to allow beams to set in them, better make sure you keep the water out. I don't know if I posted one of the pics, where a notched beam had sunk about 1 1/2" into a notched post.
I have learned so much about correct building techniques, by seeing these failing structures. Especially the young structures that have failed long before they should have.
Another thing about this job that should be a lesson to all. There was ton's of caulking. Every joint. Guess what, it didn't keep the water out. Caulking is for painters, not for waterproofing.