Post depth should generally be equal to half the height. Clean 3/4” in the bottom of the hole can help especially if you have poorly drained soils. If you are on clay maybe go deeper. If you’re going to use concrete and you’re on sand, you’ll be fine with 3’. Better yet use a ground screw, there’s very little surface area for the frost to push against.
MrBusRider t1_j9qh5yf wrote
Reply to Post hole depth? by CancelCultAntifaLol
Post depth should generally be equal to half the height. Clean 3/4” in the bottom of the hole can help especially if you have poorly drained soils. If you are on clay maybe go deeper. If you’re going to use concrete and you’re on sand, you’ll be fine with 3’. Better yet use a ground screw, there’s very little surface area for the frost to push against.