July 2021 Print Changes:

  2021 Rule Book - Section 432 / Patio 2 / Worm-Eaten Pitch

April 2022 Print Changes:

2021 Rule Book - Section 103.3 / Density and Rate-of-Growth / Medium Grain

2021 Rule Book - Appx. A Tables 10 & 11 / Design Values for Mixed Southern Pine

November 2022 Print Changes:

2021 Rule Book - Section 422 & 423 / Timber Breaks Radius Edge Decking

2021 Rule Book - Section 431 & 432 / 1-inch Knot Displacement

2021 Rule Book - Section 210.1 / Addition of No.1 & No.3 Grades

2021 Rule Book - Section 739 / Removal Occasional Pieces

March 2023 Print Changes:

2021 Rule Book - Section 716 / Manufactured Holes in the Same Cross Section

2021 Rule Book - Section 750 & 751 / Wane Dip on the Ends

July 2024 Print Changes

2021 Rule Book - Clarification of SYP and SP Definition / Removal of Argentina Southern Pine Design Values

October 2024 Changes (not in print)

2021 Rule Book - Section 164 / MC## Designations