2X4 Actual Dimensions. Keep this in mind when you measure for projects, considering your standard 2x4 is actually 1+3⁄4 in by 3+3⁄4 in. When the board is first rough sawn from the log, it is a true 2x4, but the drying process and planing of the board reduce it to the finished 1.5x3.5 size. You've just run into the reality of actual lumber sizes as compared to the nominal sizes—the sizes by which they at this point, the 2 x 4 is actually 2 inches x 4 inches, a 2 x 10 is actually 2 inches x 10 inches, etc.
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In this case, the planing is necessary for a smoother surface, so that the board could be used. To use your tv's resolution to its maximum, you want to be exactly on the line for your tv dimensions and media. In order to find the actual dimensions from a floor plan, you can set up and solve a proportion. This year i actually had an order come in 1 3/8 x 3 1/2. You will still see the difference for a standard resolution video, though, up to a distance of 18'. In north america, the 2x6 size is actually referring to the lumber's nominal dimension. Product dimensions will vary depending on moisture content. Image size is the dimensions of an image.
