Throw out your architects scale, you don't need it anymore.
This new and unique quarter inch scale rule makes taking measurements on light plots and stage prints simple and fast. Just place the center "0" on the stage center line and measure in both directions up to 35 feet in either direction without repositioning the ruler. Several extra quarter inch scales let you make measurements up to 70 feet total. And you can see everything on your print while working because the rule is made of a clear plastic. It also has a regular 18 inch ruler.