The United States Forest Products Laboratory is a federal research institution referenced in the 1935-miami-dade-building-code for its technical contributions to structural engineering standards.
In the context of Chapter 25 (Wood), the laboratory’s recommendations serve as the basis for determining allowable unit working stresses for “Yard Lumber” and “Other Lumber” 1935-Miami-Dade-Building-Code_p145_164. Specifically, Table II in Section 2503 derives its values from the laboratory’s recommendations for lumber conforming to the Grade Example of “Common” Structural Material in the American Lumber Standards (p. 157).
Additionally, the code utilizes the laboratory’s fourth-power-parabolic-Euler formula to compute allowable stresses for timber columns with length-to-dimension ratios exceeding 11 (p. 158). The laboratory is distinct from the american-society-for-testing-materials, which sets testing methods, and the united-states-department-of-commerce, which issues the American Lumber Standards.