For this project we worked with Gene and Alicia Hamman of Quality Farm Fencing. The husband-and-wife team has been building fences for a long time, Gene for 18 years.
Step 1: Preparation
Two steps are important to keep your gate from sagging. First, put in sturdy hinge posts. For this project we used 7-foot, creosote-treated round posts. We sunk them 2 feet, 6 inches in the ground. For larger spansâ16- or 20-foot gatesâuse 8-foot posts buried 3 feet deep. Take your local conditions into account. Cold climates require deeper postholes to avoid damage from the frost.
The second step is to use the correct hinges. The gates here come complete with screw-in hinges. Over time, however, this type of hinge tends to pull loose from the post.
Instead, use 3/4-inch, all-thread hinge bolts that extend all the way through the post. That way the nut can be adjusted as the position of the gate changes with time.