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1 Explanation of American Lumber Standards 1931

handle is hein.beal/explamls0001 and id is 1 raw text is: UNITED STATES DEPARTMENT OF AGRICULTURE MISCELLANEOUS PUBLICATION NO. 107 Washington, D. C. March, 1931 AN EXPLANATION. OF AMERICAN LUMBER STANDARDS By C. V. Sw:ET,' Principal Engineer, in Charge Section of Industrial Investiga- tions, Forest Products Laboratory,' Branch of Research, Forest Service CONTENTS Page Page American lumber standards in relation to asso- Appendix A ------------------------ ciation rules and to purchases by the ultimate Lumber associations issuing grading rules user -------------------------------2 for important commercial species and Rdsum6 of provisions of American lumber stand- maintaining inspection departments- 7 ards-- - - . -.-- -4 Appendix B --------------------------7 Grade 4 Select grade qualities under basic grade Size standards--------..- classification for softwood yard lumber- 8 Measirement, description, tallying, and Typical defects of determining importance marking standards------------------5 inselec grades--------------------8 Inspection service and maintenance of stand- Common grade qualities under basic grade arPd ......! ...... . . . . . . .. . . .. aid--- ----------------------- 6 classification for softwoodyard lumber- 8 Nomenclature of commercial woods-------6 Typical defects of determining importance Summary and conclusionsA----------------6 in common grades 9 American lumber standards, published as SimplifiedV Practice Rec- ommendation R 16-29, fourth edition, by the United States Depart- menV of Commerce, have been created for the purpose of eliminating unnecessary differences in the grading rules of the various softwood lumber manufacturers' associations of the United States and to em- body the efforts to date of the several organized branches of the lum- ber trade to work out together such improvements in lumber manu- facturing and merchandizinA practice as will result in the maximum satisfaction in the use of lumber consistent with the price levels and the competitive conditions that characterize the lumber trade. The provisions of American lumber star-lards serve o- a gulide to each regional lumber manufacturers' association in preparing or revising its grading rules. When an association is prepared officially to adopt and publish association rules based on those standards the rules must comply with the requirements set forth. A permanent organization, the central committee on lumber standards, made up of representatives of lumber producers, distributors, and consumers, acts as a steering committee in considering necessary additions and revisions to American lumber standards and passes judgment as to when the association rules comply with the standards. Thus they nThe information relative to grade and defect characteristics given in Appendix B is based upon extensive investigations by E. M. Davis, Forest Products Laboratory, for which the author makes grateful acknowledgment. 2 Maintained by the U. S. Department of Agriculture at Madisn, Wis., in cooperation with the University of Wisconsin. 33327-311

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