Dating pressure treated lumber
There are three broad classifications of softwood lumber: Yard, Structural, and Shop and Factory. Yard Lumber Lumber intended for ordinary construction and building purposes.Yard lumber is usually graded visually, meaning that an inspector looks at the lumber’s appearance to give it a grade.Because every tree is different, individual pieces of lumber will show a wide range of quality in strength.To ensure that the right kind of lumber is used for the right job, the U. Department of Commerce established the American Softwood Lumber Standard.Big box hardware stores don’t stock much of it though, so you’ll often have to visit a specialty woodworking store or a lumberyard to purchase it.With the basic distinction between softwood and hardwood lumber out of the way, let’s get into the nitty gritty of each type.In addition to grading the quality of the lumber, lumber grading associations also report the moisture content at the time the wood was turned into lumber (“surfaced”).
You can have a 2×4 that’s six, eight, or even ten feet long. The standard pre-cut sizes allows carpenters and house framers to buy lumber without having to do as much cutting when they get it to the construction site.These woods get their classification for a reason; they can be easily dented with just your fingernail.Softwood lumber also absorbs and loses moisture much easier than hardwoods, so extra care must be taken to maintain the wood’s stability over a lifetime.The grades are A, B, C, and D: Shop and Factory Lumber This is lumber that’s selected for “remanufacturing purposes and intended for non-structural applications.” Doors, ladders, pencils, molding, and boxes are typically made from shop and factory lumber.The grading will vary depending on how it’s going to be used.