What Are The Actual Dimensions Of A 2 By 4

2x4 and 2x6 boards lose 1 2 inch in thickness and 1 2 inch in width before leaving the mill.

For instance hardwood trim that ends up being just over 1 thick surfaced on 2 sides is called a five quarter 5 4 board. If boards will be kiln dried after milling they start their lives sized 1 62 in. It is thus possible to find 2 4s that are four eight and twelve feet in length. In most cases hardwood boards come in random widths to be ripped to size by the woodworker.

That means a 2 x 4 board is actually 1 1 2 inches by 3 1 2 inches. Then the edges are surfaced planed reducing the actual size to 1 1 2 in. A four by six post measures 3 1 2 inches by 5 1 2 inches. 2x4s are not actually 2 inches by 4 inches.

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. The larger 1x boards 1x8 1x10 etc lose 3 4 inch in width. A nominal 2x4 board starts out 1 56 in. 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 canada and the united states the standard lengths of lumber are 6 8 10 12 14 16 18 20 22 and 24 feet 1 8 2 4 3 0 3 7 4 3 4 9 5 5 6 1 6 7 and 7 3 m. Next they re dried in a kiln then surfaced to an actual 1 1 2 in. If you are using rough sawn or true dimension timbers however 4 inches means 4 inches. Lumber manufacturers typically cut a tree into the various standard types of dimensional lumber very shortly after the tree is felled.

One of the most popular cuts of lumber for home building is the two by four which actually measures 1 5 inches high by 3 5 inches wide. That means a 1x10 is actually 3 4 inch in thickness by 9 1 4 inches. Here are the common sizes of lumber and their actual sizes. Hardwood board widths vary.