Abstract: A fence is constructed of fence sections with at least two parallel horizontal rails and vertical pickets attached to the rails. These sections may be preassembled. They are held at their ends in connectors fastened to vertical posts. Rails have unique sectional profiles for enhanced rigidity for spanning greater distances between posts. Rail profile is a channel with open bottom, a flat top web, and a pair of legs extending down from the top web. An additional web extends down one side and joins one of the legs to provide extra rigidity. Apertures in the top web corresponding to the shape of the pickets receive the pickets therethrough. Pickets are fastened to the rails by features which enable the rails to assume an angle other than 90 degrees for securing between post that are not at the same elevation, or “racking”.