There are a couple things that "graders" look for in a piece of lumber. One is the knot holes, if they are large this effects the grade. The other is bark no one wants a board that is all bark. So when you are looking for a strong piece of lumber you want one that has knot holes smaller than a half dollar coin and not all barked up the only bad effect that the bark has is it makes it hard to nail to.
sleep
In construction grade staking: blue tops (2x2x6 to 12 inch stakes) mark the level of finish grade; red tops (2x2x6 to 12 inch stakes) mark the level of sub-grade; the color comes from lumber crayons used by the surveyor to ID the stakes by colorizing stake tops;
Water, Trees, Lumber.
Treated lumber should be used in outdoor construction. There are different types of treated lumber, some are for above ground use and some are for below grade use.
Fishery and Lumber
It is the second weakest grade in this scale: C14, C16, C18, С22, С24, С27, С30, С35 and С40.
Hampton's Willamina
16inches above grade
Yes. You will have to work around the ink stampings and knots, but the wood will take a stain.
lumber and tech stuff
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Top 6th grade class is 601 honors
premium select has less knotts, #2 construction grade.