8/27/2023 0 Comments 2x10 actual size![]() ![]() The contractor could have bought the joists at a discount and was never caught by the Building Inspector.īy the way, the grain of wood in your picture indicates a better than a normal piece of lumber. If you read the text, you'll see that there is a tolerance of 1/4" in the width and 1/16" in the thickness.the 2x direction.Īlso, the lumber could have been mis-cut and was rejected, so you won't find any grade stamp on your joists. I explained all that to let you know that your lumber could have been milled "green", but dried out, which caused the lumber to shrink. (There is a seldom used mark of S-DRY, which stands for Surface Dry and had a moisture content between 15%-19%.) Actually, if the stamp is smeared and "out of focus" to the point you can't read it, then it was milled "green". If it reads DRY, then it was milled when it was less than 15% moisture content. If it reads GRN, then it was milled (cut at the mill) when it was green and had more than 19% moisture content. Next to that round icon, you'll see the "moisture" grade. I suspect you'll find several numbers and letters in a small grouping (about 1"x2" area) with one of the icons of WWPA. If you look on your joists, you'll see a black ink "Grade Stamp". Where I live, grading is primarily done by Western Wood Product Association. (This can vary somewhat based on the species.). If you look at Table 3, "Dimensional" you'll see for 2 x 10's, the minimum size is 9 1/2" for green and 9 1/4" for dry. Grading rules for that (especially where you live) is established by the American Softwood Lumber Association, PS-20. Yes, there are grading rules and tolerances for lumber, timbers, etc.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |