(1) The posts to which the gate is hung are insufficient for carrying the weight of the gate or aren't anchored in the ground properly to prevent them from tilting over time. A 12' long gate is going to exert some serious downward force at the unsupported end of the gate, and the longer the lever, the less force is required to move whatever is at the opposite end of the lever -- in this instance the post. Your post needs to get exponentially stronger as the gate gets longer. For a 12' gate that stands 4' high, I would use 10" x 10" x 10' posts, anchored in post holes six feet deep and at least 3' in diameter, then filled with the most durable concrete I could find, including a polymer prod
Wooden gates add ambiance and security to your home. Gates should include features and designs that allow your gate to operate flawlessly into the future. Consent and Code Contact your local building department before planning to ensure that the location and design of the gate complies with code, or if consent is needed in your area. Support Wooden driveway gates are heavy. Adequate support is one of the most important aspects for longevity and durability. Six-by-six posts are typically required, but four-by-four posts bolted together will also suffice. Plant the Posts Step 1 Dig a hole at least 18-inches square, and 36 inches deep. Pour 6-inches of gravel into the hole. Step 2 Set the post
