Modular fence structure

A picket fence panel assembly, comprising:

• upper and lower vertically spaced inverted U-shape rails each having a bight portion and a plurality of longitudinally spaced non-circular apertures therethrough in substantial vertical alignment,
• each aperture being characterized by a rail tab projecting toward an opposite limit of the aperture;
• a post at respective ends of said panel assembly;
• rib means on each said Dost for supporting respective end portions of said rails;
• a like plurality of vertically disposed tubular pickets cooperatively received by and extending vertically through the aligned apertures,
• each said picket having vertically spaced wall slots cooperatively nesting said tabs;
• and,
• picket locking means interposed in one rail aperture between the picket outer surface opposite said tab and the opposite limit of the aperture diametrically opposite the tab and cooperating with said tab for precluding movement of said pickets with respect to said rail,
• said picket locking means including:
• an inverted L-shaped member having a foot portion overlying the rail bight portion adjacent said one aperture and having a leg substantially defining a V-shape and having one leg of the V-shape underlying the rail bight portion in opposition to said foot portion.