I know this questions can't be answered, since it depends on so many factors, but let's call this an opinion survey.
Fence will be 5' high, with a 2x4 pressure-treated pine (PTP) wood frame and horse-fencing "panels". Posts will also be PTP, 4x4. Stainless steel fasteners, to avoid corrosion due to the PTP.
Ground is mostly clay, somewhat acidic (pH about 6.5), not impermeable, but also not the most permeable stuff ever.
Since the majority of the surface area is horse-fencing, I'm not expecting the wind to be much of an issue.
Of the following two options, which would you go with?
- Use 8' posts and bury them 3' deep, tamped-earth, with gravel at bottom for drainage.
- Use 5' posts, anchored at the base to a hot-dipped galvanized post base, either something like an Oz-post T4-850, or a Simpson CB44HDG embedded in a concrete footing?
My main concerns would be:
- Rot/corrosion. Which will deteriorate faster, a buried PTP 4x4, or a HDG anchor in contact with corrosive PTP wood?
- Cost. The HDG anchors are expensive! Are they worth it?
- Time. I'll be digging by hand (digging bar and post digger).
- Warping. The PTP is very green, very wet. Will one of these two options deal better with the inevitable warping-stress?
What do you think?