The greenhouse is designed to be 100 ft long. Requiring supports every 3 feet. Using 1 3/4 galvanized fence posts cut in half I prepped 34 pipes. Because of the wind, we decided to use long support posts. Once the posts are cut, one end is predrilled with a 1/4 hole 12″ from the top to anchor the hoop. 
Don’t forget to remove the burrs from the metal. If it doesn’t cut you it definitely will puncture the greenhouse covering.
