Using Southern Pine

Grade Descriptions

Based on SPIB Grading Rules

• • Visually Graded Dimension Lumber: 2" to 4" thick, 2" and wider
  • Prime Dimension: 2" to 4" thick, 2" to 12" wide
  • Timbers: 5" x 5" and larger
  • Mechanically Graded Lumber - Machine Stress Rated (MSR) Lumber: 2" and less in thickness, 2" and wider
  • Mechanically Graded Lumber - Machine Evaluated Lumber (MEL):
    2" and less in thickness, 2" and wider
  • E-rated Structural Laminations: 2" and less in thickness, 2" and wider
  • Glued Lumber: 4" and less in thickness, widths vary by product
  • Scaffold Plank: 2" and 3" thick, 8" and wider
  • Stadium Grade: 2" thick, 4" to 12" wide
  • Seawall Grades: 2" to 4" thick, 6" to 14" wide
  • Marine Grades: 1" to 20" thick, 2" to 20" wide
  • Decking, Heavy Roofing and Heavy Shiplap: 2" to 4" thick, 2" and wider
  • Boards: 1" to 1-1/2" thick, 2" and wider
  • Industrial Lumber: 2" and thicker, 2" and wider
  • Structural Lumber: 2" and thicker, 2" and wider
  • Radius Edge Decking: 1-1/4" thick, 4" to 6" wide
  • Finish: 3/8" to 4" thick, 2" and wider
  • Flooring, Drop Siding, Paneling, Ceiling and Partition, OG Batts,
    Bevel Siding, Miscellaneous Millwork
  • Moulding