Help with reading blueprints

[shawnzilla]

I'm looking at the blueprints for Oscar's Happy Hour Bartop cab and am confused about a couple of his measurements.

If I'm looking at page 2 of the blueprints (the side panel detail). There are three different measurments notated at R1/4" R3" and R3"

What unit of measurement is this? The location of these measurements is where the top panel meets the front and back angled section.

For reference, these plans are located at http://www.skum.org/bartop/

[rbarr110]

That means the radius size of the rounded corner on the side panels.

[shawnzilla]

That means the radius size of the rounded corner on the side panels.

Thank you! I figured it must be something like that. (my college geometry days are soooooooo far behind me)