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Significance and Use
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.
1.1 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D9 Terminology Relating to Wood and Wood-Based Products
D143 Test Methods for Small Clear Specimens of Timber
D198 Test Methods of Static Tests of Lumber in Structural Sizes
D245 Practice for Establishing Structural Grades and Related Allowable Properties for Visually Graded Lumber
D1165 Nomenclature of Commercial Hardwoods and Softwoods
D1990 Practice for Establishing Allowable Properties for Visually-Graded Dimension Lumber from In-Grade Tests of Full-Size Specimens
D2395 Test Methods for Specific Gravity of Wood and Wood-Based Materials
D2555 Practice for Establishing Clear Wood Strength Values
D2915 Practice for Sampling and Data-Analysis for Structural Wood and Wood-Based Products
D3737 Practice for Establishing Allowable Properties for Structural Glued Laminated Timber (Glulam)
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials
D4444 Test Method for Laboratory Standardization and Calibration of Hand-Held Moisture Meters
D4761 Test Methods for Mechanical Properties of Lumber and Wood-Base Structural Material
ANSI StandardsANSI/AF&PA NDS National Design Specification for Wood Construction
National Institute of Standards and Technology StandardPS 20 Voluntary Product Standard, American Softwood Lumber Standard
Canadian Standards Association StandardCSA O141 Softwood Lumber
ICS Number Code 79.080 (Semi-manufactures of timber)
ASTM D6570-04(2010), Standard Practice for Assigning Allowable Properties for Mechanically Graded Lumber, ASTM International, West Conshohocken, PA, 2010, www.astm.orgBack to Top