Horizontal Extension

[AndyBare]

G24 A ROBOT’S horizontal dimensions may never exceed 20 in. beyond its FRAME PERIMETER (see illustration in Figure 3-6).

I am confused as to whether or not you can extend 20 inches beyond you frame perimeter in multiple directions? I do not see anywhere that is says you can only have an extension in only a single direction, but if you have two single extentions of 20 inches going out in separate directions, technically, that would make 40" of extensions beyond your frame perimeter.