PS-20-10 - American Softwood Lumber Standard (Download)

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This Standard pertains to softwood lumber. It establishes standard sizes and requirements for development and coordination of the lumber grades of the various species, the assignment of design values when called for, and the preparation of grading rules applicable to each species. It provides for implementation of the Standard through an accreditation and certification program to assure uniform industry-wide marking and inspection.

Referenced in the following Codes:

  • 2009 International Building Code
  • 2009 International Residential Code
  • 2012 International Building Code
  • 2012 International Residential Code

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