[EricH]

Originally Posted by usacat6

Still need clarification about gaps along a frame edge. Assuming Figure 4-1 in the bumper-rule section, and assuming that the displayed bumper segments are such that the portion covering a given edge is 8" (measured from corner to middle of frame), then is there a maximum length of the remaiming exposed frame, or does the amount of exposure not matter?

As long as you have the 8" bumper segments from the corners, there is no maximum length of exposed frame. There is also no minimum length of exposed frame.