In reality these measurements are not a true measurement of the lumber thickness or width. If you can stop someone in the store to help explain the inconsistency theyll start throwing around a few words like nominal sizes and actual sizes and softwood lumber and hardwood lumber.
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This measurement refers to the thickness and width of the lumber and the length varies.
True dimension of 2×4. Surfaced refers to a finishing process that smooths the lumber to remove all saw marks. Measure the actual width and thickness of a pine board like a 2×4 and then look at the sign above the rack. The chart can be downloaded and printed from additional information below.
A 2×4 board is actually only 1 12 inches by 3 12 inches. Wood dimension chart this chart shows the nominal in name only and corresponding actual real dimensions of common wood sizes like 24 dimensions and 14 lumber. Actually the nominal size is often never the actual size.
A 2x6s real or true dimension is 15 x 55 within the industry it is referred to as its actual size. Same for 1×4 2×4 and 4×4 etc. 2x4s are not actually 2 inches by 4 inches.
The nominal size is used when discussing lumber nearly 100 of the time. 1×4 are 34 x 312 2×4 are 112 x 312. Here are the common sizes of lumber and their actual sizes.
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 15×35 size. The true measurement of a 2×4 is actually about 15×35. In north america hardwood lumber is usually specified using the quarter system where a board is identified by its thickness in quarters of an inch.
When the board is first rough sawn from the log it is a true 2×4. Hardwood lumber is sized based on how many sides are surfaced. The measurements used however may make you think you are getting cheated.
Lumber sizes and measurement. And this is true for most of the lumber you buy the actual dimensions will be reduced from the nominal dimension by which the lumber is classified. For example a 2×4 is actually 1 12 by 3 12 in size while a 1×6 board when measured proves to be only 34 x 5 12 in actual size.
Framing lumber is identified by the height and width of the board. Something doesnt quite match up. The way this comes about is that when lumber is cut from the logs it is considered rough cut.
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