ASTM D6570-18a - 1.10.2018
 
Significance and Use

4.1 The procedures described in this practice are intended to be used to establish appropriate allowable unit stresses, moduli of elasticity, and specific gravity for mechanically graded solid sawn lumber. An on-going quality control program to monitor compliance with the assigned grade properties is required.

 
1. Scope

1.1 This practice covers the methodology of grade qualification, assignment of design properties, and requirements for the quality control of mechanically graded solid sawn lumber.

1.2 This practice acknowledges alternative methods for the assignment of specific properties. These methods are assignment by test, relationship to other properties, and by procedures in other appropriate standards.

1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

 
2. Referenced Documents

D9-20

Standard Terminology Relating to Wood and Wood-Based Products

ANSI/AF&PA NDS

National Design Specification for Wood Construction

D198-22a

Standard Test Methods of Static Tests of Lumber in Structural Sizes (Includes all amendments and changes 10/14/2022).

D245-25

Standard Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber

D143-25

Standard Test Methods for Small Clear Specimens of Timber

D4761-25

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

D4444-25

Standard Test Method for Laboratory Standardization and Calibration of Hand-Held Moisture Meters

D4442-20(2025)

Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials

D3737-18(2023)e1

Standard Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam) (Includes all amendments and changes 11/9/2023).

D2915-25

Standard Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products

D2555-17a(2024)e1

Standard Practice for Establishing Clear Wood Strength Values (Includes all amendments and changes 2/23/2024).

D2395-17(2022)

Standard Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials

D1990-26

Standard Practice for Establishing Allowable Properties for Visually-Graded Dimension Lumber from In-Grade Tests of Full-Size Specimens

D1165-25

Standard Nomenclature of Commercial Hardwoods and Softwoods

CSA O141

Softwood Lumber

PS 20

Voluntary Product Standard, American Softwood Lumber Standard