The frost line where I live is only 12 inches. The code around here
says it is okay to bury posts 2 ft. deep with poured concrete. That I
do know. Maybe I'm not clear on the beams. I was planning to attach
them to the 4x4 posts with lag or carriage bolts. I also plan to let
the 4x4s run continuous 3 ft. above the beam to attach railings. the
joists will be attached to the 2x10 beam with metal joist hangers on 16
in. centers. Any experienced opinions on this would be appreciated.