FYI, ZONE LETTERING HEIGHT IS COVERED BY ASME Y14.2 AND THE ZONES THEMSELVES ARE COVERED BY ASME Y14.1 (2012).
PER ASME 14.1: 5.5.2 Zone Methods. There are two methods of
numerical zoning on multiple-sheet drawings, repetitive
and continuous. The repetitive method (preferred) is to
begin each drawing sheet with zone number one. The
repetitive method requires that zone references throughout
all drawing sheets include the sheet number. When
the repetitive method is not used, the continuous
method shall be used throughout all drawing sheets
starting with zone number one on sheet one, continuing
each new sheet with the next higher zone number than
the last number used on the previous sheet. Do not
mix repetitive and continuous methods on the same
drawing.
I HAVE SEE BOTH OF THESE DONE. I HOPE THIS HELPS.
THANKS,
DICK