[EricH]

Gary, Figure 4-3 clearly shows that a gap of 1/4" or less can go longer than 8" long, and a gap of less than 8" can go deeper than 1/4". Two separate parts are marked OK that are either longer than 8" or deeper than 1/4".

So either the rule is not written clearly or the pictures are wrong. Assuming the Figure 4-3 is right, the rule should really read something like, "Any gap that is deeper than 1/4" && wider than 8" will be considered unsupported." If the figure is wrong, all three marked areas are illegal.