<table width="90%" cellspacing=0 cellpadding=0 align=center><tr><td>Quote, originally posted by ep72 &raquo;</td></tr><tr><td class="quote">Usually on blueprints .5 is 5/10ths = 6"</td></tr></table>

.5' = 6"
.5" = 1/2"

And I was all set till I saw that framing square.