Ding rods to ensure structural integrity similar to residential aluminum fencing. All components are pre-punched or drilled for easier installation. Easily follow the modest changes of ground along the property lines. Or 3" square ¡¨¢ 0.125" wall Spacing between pickets Standard: 3-13/16"; optional: 1-1/2" or 1-5/8" Fasteners Stainless steel Width 6' to 8' Perimeter of schools and protect children. Blue warrior style industrial aluminum fences are used to provide higher security and keep intruders out. Warrior style aluminum fences are ideal for providing higher security and keeping intruders out.