How Wide Is A 2x4 Board

Actual dimensions and nominal dimensions youve just run into the reality of actual lumber sizes as compared to the nominal sizesthe sizes by which they are identified in the store. Width is slightly more variable. In rough cut condition a 2x4 is slightly less than 2 inches thick and approximately 4 inches wide.
how wide is a 2x4 board

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Pre wwii lumber was cut at stated dimensions a 2x4 was actually 2 inches by 4 inches.

How wide is a 2x4 board. A board foot is 1 inch thick 12 inches wide 12 inches long. What you will find is that your 2 x 4 is actually 1 12 inches x 3 12 inches and that your 1 x 6 board is actually 34 inch x 5 12 inches. A 2x6 is 5 12 inches wide. Re manufactured lumber is the result of secondary or tertiary processingcutting of previously milled lumber.

This chart shows the nominal in name only and corresponding actual real dimensions of common wood sizes like 24 dimensions and 14 lumber. In actuality a one by board measures only about 34 inch thick and a two by board is only about 1 12 inches thick. 2x4s are not actually 2 inches by 4 inches. Specifically it is lumber cut for industrial or wood packaging use.

Lumber is cut by ripsaw or resaw to create dimensions that are not usually processed by a primary sawmill. Dont be confused by nominal board dimensions when you buy lumber or read plans. We show you the quick translation to actual numbers including 2x4. Incidentally its 1 12 inches thick.

Re sawing is the splitting of 1 inch through 12 inch hardwood or softwood lumber into two or more thinner. When wood is milled from a rough to a smooth surface it loses about inch from each of its four sides. A piece of surfaced sanded smooth 2x4 lumber actually measures 1 inches thick and 3 inches wide. 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 15x35 size.

The rule of thumb is to subtract 12 for 6 inch wide and narrower boards and subtract 34 inch for 8 inch wide and wider boards. A 12 ft 2x4 would be 8 board ft 13 the width but 2x the thickness.