What is the little rectangular box with an “R” number in it at the beginning of many sections?
The “R” number indicates that there is supplemental information available in the Reference section, located in the back of the printed cost data books. While some o of the information in the Reference section is general in nature, much of it provides additional data specific to some particular material or application. The R number is RSMeans’ way of suggesting a location of potentially very useful additional information.
