22084mp4 May 2026

: Most builders recommend burying one-third of the total post length in the ground. For a standard 6-foot fence, the post should be at least 2 feet deep.

: The hole should typically be three times the width of the post (e.g., a 12-inch diameter hole for a 4x4 post) to allow for sufficient concrete or gravel packing. 22084mp4

If you are instead asking about the technical specifications for a "deep post" (as in a structural fence post): : Most builders recommend burying one-third of the

: In colder climates, posts must be set below the frost line —often 36 to 48 inches deep—to prevent "frost heaving," where the ground pushes the post out as it freezes and thaws. 22084mp4