Originally, a “2 x 4” was cut as a rough green board that was exactly 2 x 4 inches in size, but by the time the boards were dried and planed, the boards were smaller, approaching the now-standard 1 1/2 x 3 1/2 inches in size.
Lumber Dimensions. 2x4s are not actually 2 inches by 4 inches. When the board is first rough sawn from the log, it is a true 2×4, but the drying process and planing of the board reduce it to the finished 1.5×3.5 size. Here are the common sizes of lumber, and their actual sizes.
Dimensional lumber is cut to a specific length, width, and depth. However, there The tables below provide both the nominal and actual sizes so many common.
Commercial softwood lumber dimension chart – nominal and actual sizes.
Trying to figure out lumber dimensions can be confusing, especially when the nominal size doesn’t match Measure the actual width and thickness of a pine board (like a 2×4) and then look at the sign above the rack. 2×12, 1-1/2 x 11-1/4.
Commercial Standard Lumber Sizes Table Chart Dimension lumber can be purchased as dry or green. Nominal Size, Actual Size, Weight / Foot **. 1 X 3.