I am designing a pole barn to park our motorhome under and I have seen a bunch of pole buildings being built on pillars with brackets for posts. I have built pole buildings by pouring poles in concrete but never used any of those brackets. I have done a bunch of street lights and traffic signals and they have LONG j-bolt anchors, generally, tied to reinforcing steel. I can't get my head around a 6X6 post being bolted to a sheet metal bracket holding a roof in a wind. Does it really work LOL????

I also see a lot of people splicing PT posts to non treated posts, 3 feet or so above grade, with brackets, in order to cut down on the length of the poles (6X6X16 is about the longest commonly available). Anyone know if the IBC or any standard covers these brackets and splicing of poles?