As the primary component of an iron safety fence, panels include all the important hardware between each fence post. Altogether, the panels are what form the bulk of your fence. To create one, each safety fence panel begins with a top and bottom rail, typically made from square tubing, 1″ per side. These rails act as the anchors for the pickets, the vertical bars that create the barrier portion of your fence. Pickets are commonly between 1/2 inch to 5/8 inch in diameter and be made from square tubing similar to the rails.