ASTM D5664-99 - 10.9.2001
 
1. Scope

1.1 This test method covers procedures for obtaining data to assess the initial adjustments to allowable design stresses for lumber treated with candidate commercial fire-retardant (FR) formulations and further procedures for obtaining data to assess the effect of extended exposure to elevated temperature of 66 ± 2oC (150 ± 4oF).

1.2This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

 
2. Referenced Documents

E176-24a

Standard Terminology of Fire Standards (Includes all amendments and changes 12/9/2024).

U.S. Product Standards PS 20

American Softwood Lumber Standard Available from American Lumber Standard Committee, Incorporated (ALSC), P.O. Box 210, Germantown, MD 20875-0210, http://www.alsc.org.

E84-26a

Standard Test Method for Surface Burning Characteristics of Building Materials (Includes all amendments and changes 4/15/2026).

D6841-21

Standard Practice for Calculating Design Value Treatment Adjustment Factors for Fire-Retardant-Treated Lumber

D5516-26

Standard Test Method for Evaluating the Flexural Properties of Fire-Retardant Treated Softwood Plywood Exposed to Elevated Temperatures

D4761-25

Standard Test Methods for Mechanical Properties of Lumber and Wood-Based Structural Materials

D3500-20(2026)

Standard Test Methods for Wood Structural Panels in Tension

D1165-25

Standard Nomenclature of Commercial Hardwoods and Softwoods

D143-25

Standard Test Methods for Small Clear Specimens of Timber

D9-20

Standard Terminology Relating to Wood and Wood-Based Products