If the nominal size is smaller than 1” then the actual size is 1/4” smaller than the nominal size.If the nominal size is larger than 2” and smaller than 8” then the actual size is 1/2” smaller than the nominal size.If the nominal size is 8” or larger, then the actual size of the board will be 3/4” smaller.ġ×1 – Framing Lumber – Dimensional Lumber – The Home Depot. How do you convert nominal size to actual size? When the board is first rough sawn from the log, it is a true 2×4, but the drying process and planning of the board reduce it to the finished 1.5×3. The true measurement of a 2×4 is actually about 1.5×3. The most common or standard deck board width is 6-inch wide planks based on square-foot coverage, labor, and material cost. What is the actual width of a deck board? If you use 5/4 decking, you are getting two-thirds of the board of a 2×6. What is the actual width of a 5 4 deck board? The nominal measurement is made before the lumber is surfaced. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). The “nominal” cross-section dimensions of a piece of lumber, such as 2 X 4 or 1 X 6, are always somewhat larger than the actual, or dressed, dimensions. Why is dimensional lumber not actual size? They reduce the number of injuries like unwanted splinters during the handling and manufacturing process and also ensure that the lumber stays looking its best all throughout until the customer sees it. Why do 2×4’s have rounded edges?Ģ×4 have rounded edges as it’s very beneficial to the wood itself and those working with it. Older homes may have lumber with nominal and actual dimensions that match: 2x4s that are actually 2 inches by 4 inches. The actual dimension is the size: 1 1/2 inches by 3 1/2 inches, for example. ĭimensional lumber is lumber that is cut to standard widths and depths, but never lengths. Our Boards come in the following dimensions with the common size listed first, followed by the actual size in the parenthesis. In this case, the planing is necessary for a smoother surface, so that the board could be used for interior applications. Spruce/Pine/Fir Common Board (Actual Dimensions: 0.70 in. What is the actual size of a 1 x8 No 2 Pine? The larger 1x boards (1×8, 1×10, etc.) That means a 1×10 is actually 3/4 inch in thickness by 9 1/4 inches. That means a 1 x 4 board is actually 3/4 inches by 3 1/2 inches.
1×4 and 1×6 boards lose 1/4 inch in thickness and 1/2 inch in width before leaving the mill.
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