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Nominal Actual Wood Sizes

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The label put on the lumber you buy is called the nominal lumber size. Actual softwood lumber dimensions.

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Once the wood dries it shrinks.

Nominal actual wood sizes. 2x4s are not actually 2 inches by 4 inches. Commercial standard lumber sizes table chart. The actual size is always a little bit smaller.

We show you the quick translation to actual numbers including 2×4. Dry lumber that has been seasoned or dried to a moisture content 19 or less and green lumber has a moisture content of greater than 19. Dont be confused by nominal board dimensions when you buy lumber or read plans.

After the board is dried and planed it becomes its actual size of 1 12×3 12. Then after it is dried the wood is planed to smooth the surface and make the wood a uniform size. 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.

Plywood is graded so that each face receives a grade of a b c or d grades. A sheet of 12 inch plywood is really 1532 inch thick while a 34 inch sheet is 2332 inch thick. Softwood lumber is generally used for framing walls and floors.

Here are the common sizes of lumber and their actual sizes. The difference between nominal and actual dimensions. Once planed the wood is considered finished thus the nominal size of the lumber you purchase is different from the actual size.

Subtract 14 inch for dimensions under 2 inches 51 mm subtract 12 inch for dimensions under 8 inches 200 mm subtract 34 inch for larger dimensions. Nominal refers to the dimension the lumber was sawn. Actual lumber sizes lumber depth and width are typically given in nominal dimensions.

This chart shows the nominal in name only and corresponding actual real dimensions of common wood sizes like 24 dimensions and 14 lumber. Something doesnt quite match up. Hardwood lumber is sized based on how.

When a 24 is cut out of a log it is 2×4. The wood is still green and wet. Dont leave the house without your tape.

Rough lumber cannot be less than than 18 32mm thicker or wider than the nominal finished thickness or width except that 20 of a shipment cannot be less than 232 24mm thicker or wider. Measure the actual width and thickness of a pine board like a 2×4 and then look at the sign above the rack. Commercial lumber dimensions american softwood lumber standards nominal and actual sizes are indicated in the table below.

Some people get a little maniacal about nominal vs. The most common nominal thicknesses of plywood are 12 inch and 34 inch but once again the actual sizes are slightly different. Softwood lumber comes in a number of standard lengths as listed in.

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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Nominal Wood Sizes
Nominal Wood Sizes
There are two main types of lumber.
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