Determine where the fence will be located. Draw a diagram of the planned fence. Measure how long each side of the fence will be, and record each measurement on the diagram.
Take your diagram to a store that sells lumber for fences. Ask a sales associate to create a materials list from the map. Purchase the materials needed for the job.
Mark the spots on the ground where the 4-by-4 posts will be set. Stretch a string line between two wooden stakes to use as a guide for locating where the holes should be dug. Using a measuring tape, mark a spot every 7 feet 9 inches.
Dig a hole 12 inches to 18 inches deep and 6 inches wide at each mark using a post hole digger.
Mix the concrete in a wheelbarrow using water and a mason's hoe.
Each 4-by-4 post must be set in its hole so it is exactly vertical before adding the concrete. Fill the hole around each post with mixed concrete. Allow the concrete to dry for 24 to 48 hours.
Mark each corner post 20 inches up from the ground and 48 inches up from the ground. Snap a chalk line across all the posts using the corner post markings. This will mark each post to locate where the rail should be fastened.
Place each 2-by-4 between two posts at the chalk line markings. Fasten it to the posts using a framing nail gun.
Use a siding nail gun to fasten each picket to the rails. For consistent spacing, use a scrap picket as a spacer.