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American Wood Council

Where can I find information for nominal 1", 1-1/4", and 1-1/2" stress-rated boards?


Common board grades (less than 2" thick) used for decking or sheathing do not typically reflect design values for the lumber. When design values are required for boards used in design, stress-rated boards of nominal 1”, 1-1/4”, and 1-1/2” thickness, 2” and wider, of most species, are permitted to use the design values shown in the NDS Supplement for Select Structural, No. 1 & Btr, No. 1, No. 2, No. 3, Stud, Construction, Standard, Utility, and Clear Structural grades as shown in the 2” to 4” thick categories, when graded in accordance with the stress-rated board provisions in the applicable grading rules. Information on stress-rated board grades applicable to the various species is available from the respective grading rules agencies. See NDS Supplement Table 1B, footnote 1 and NDS Supplement Tables 4A and 4B, footnote 2 for more information.

 
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