**EDITED**: Didn’t clearly describe what I’m after. One more try:

Anyone know if Clark’s catalogue (circa 2004) has ‘set’ interval pattern on their outlines? Rocker & outlines are measurable on the tearsheets, but the interval distance from **x ****I’m not finding,** i.e., where’s the zero point on the blank to reference the dims?

Some outlines I see (USBlanks) are center point of blank, measuring out 12", 18", 24", and so forth. I tried this attempting to dupe a 7’-3" Clark blank in the catalogue and it threw me off.

I took one of my architectural rulers to see what distance the marks are (assuming the drawing and marked intervals are accurate to the scale on the tear sheet. if their drawing are true, these intervals are all over the place. I'm guessing there must be a standardized set of intervals for all the boards in the Clark Catalogue (or I may have a bogus Clark book).

See attached. Thanks.