In some of the larger timbers, like the 2x8's, 2x10's, and 2x12's, we also stock longer lengths (some up to 24'), since these are often used as rafters or for floor joists, where longer is usually better. Commercial softwood lumber dimension chart - nominal and actual sizes. The usual lengths are 8', 10', 12', 14', and 16'. Lets say you have a piece of random width oak with an actual size of 7/8 thick by 7 3/4 wide by 63 long. a nominal 8x8 timber has a minimum finished size of 7.25' x 7.25'), most timbers over 7' are finished with 1/2' removed. The length of the boards is generally exactly what you order, though we usually only stock pieces of even lengths. While NIST Publication PS20 indicates that nominal 7' to 15' thick timbers should have 3/4' removed for a finished dimension (e.g. In this case, the planing is necessary for a smoother surface, so that the board could be used for interior applications. If you have full-dimension lumber it is about 1.33 times stronger by being 2 inches instead of 1.5 inches (goes directly with thickness), and about 1.34 times for being 8 inches vs. A 1圆, for example, actually measures 3/4" x 5 1/2". 'A planed 2x8 is actually only 1.5 x 7.25 inches. Instead, a 2x4 is really only 1 1/2" by 3 1/2". Because of this extra milling, a 2x4 no longer measures a full 2 inches by four inches. Lumber Dimensions Lumber Dimensions 2x4s are not actually 2 inches by 4 inches. Now, most timber is milled and planed to give it a little more of a finished look, and a little more of a consistent size and profile. It is because hardware stores sell lumber that. In the past, when a timber was called a 2x4, it actually measured 2 inches by 4 inches. A 2×8 piece of lumber is actually 1 x 7 inches (38 x 203 mm) smaller than advertised at hardware stores. An important thing to know is that with most any dimensional lumber, there is a difference between what the board is called, and what it truly measures. The larger 2x boards (2x8, 2x10, etc.) lose 3/4 inch in width. What we stock is a framing grade of spruce in an assortment of sizes and lengths. 2x Board Sizes That means a 2 x 4 board is actually 1-1/2 inches by 3-1/2 inches. "Dimensional" lumber is the general name for framing lumber.
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