R502.3

Section R502.3 is titled 'Allowable joist spans' and provides a prescriptive system for sizing of common species of lumber floor joists. The purpose of this section is to provide predesigned floors which are compliant with the base design parameters required by the code, assuring structural stability (within those presumed design parameters), and allowing for designs to be done without hiring a design professional.

The model shows two groups of floor joists (grouped by joist spacing) with the maximum allowable span labeled per Table R502.3.1(1). Presuming that it is known they are all of the same species can you determine the size, spacing, design dead and live load, species, and grade of each floor joist?