Structural grades are determined by knot size and density. Below is a short description of the various structural grades and their common uses:

  • Select Structural – High quality, limited in characteristics that affect durability. Excellent appearance with little to no knots.
  • #1 & Btr – Recommended for construction where high strength is needed. Good appearance with minimal knots.
  • #2 & Btr – Not as durable as #1 & Btr yet still has a good appearance. More knots than 1 & Btr, but knots are well spaced to up hold design quality appearance.
  • Dense “Old Growth” – Dense is a Sel Str and #1 & Btr grading add on. Dense grade adds an additional element of structural strength and helps minimize checking. Does not effect the appearance grade of the timber.