Aspect Ratio 5:4; eg, 8x10, 16x20 popular panel sizes
The Basic Dynamic Symmetry Armature for panels with sizes, 8x10, 16x20 and any others with the aspect ration 5:4. The aspect ratio of 5:4 is so close to that of 14:11 that I might use this armature in the field for an 11x14 panel.