ASTM D3957-09(2020)
Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings

Standard No.

ASTM D3957-09(2020)

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM D3957-09(2020)

Scope

1.1 These practices cover the visual stress-grading principles applicable to structural wood members of nonrectangular shape, as typically used in log buildings. These practices are meant to supplement the ASTM standards listed in Section 2, which cover stress-grading of sawn lumber and round timbers. Pieces covered by these practices may also be used in building types other than log buildings. 1.2 The grading provisions used as illustrations herein are not intended to establish grades for purchase, but rather to show how stress-grading principles are applied to members used in log buildings. Detailed grading rules for commercial stress grades which serve as purchase specifications are established and published by agencies that formulate and maintain such rules and operate inspection facilities covering the various species. 1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical 1 These practices are under the jurisdiction of ASTM Committee D07 on Wood and are the direct responsibility of Subcommittee D07.02 on Lumber and Engineered Wood Products. Current edition approved April 1, 2020. Published April 2020. Originally approved in 1980. Last previous edition approved in 2015 as D3957 – 09 (2015). DOI: 10.1520/D3957-09R20. Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States 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. conversions to SI units that are provided for information only and are not considered standard. 1.4 This 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 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.

ASTM D3957-09(2020) Referenced Document

• ASTM D245 Standard Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber*， 2022-02-01 Update
• ASTM D25 Standard Specification for Round Timber Piles
• ASTM D2555 Standard Test Methods for Establishing Clear Wood Strength Values
• ASTM D2899 Standard Practice for Establishing Allowable Stresses for Round Timber Piles
• ASTM D3200 Standard Specification and Test Method for Establishing Recommended Design Stresses for Round Timber Construction Poles*， 2022-08-01 Update

ASTM D3957-09(2020) history

• 2020 ASTM D3957-09(2020) Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings
• 2009 ASTM D3957-09(2015) Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings
• 2009 ASTM D3957-09 Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings
• 2006 ASTM D3957-06 Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings
• 2003 ASTM D3957-03 Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings
• 1990 ASTM D3957-90(2002) Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings
• 1996 ASTM D3957-90(1996)e1 Standard Practices for Establishing Stress Grades for Structural Members Used in Log Buildings