dimensional lumber sizes

Nominal dimensions which identify certain board, beam or post do not represent its actual parameters. Dimensions … Lumber dimensions in widths and thickness are 1/2-inch less than the size. Lumber measurements in width and thickness normally 0.25 inches (6 millimeters) – 0.75 in (19 mm) smaller than nominal sizes. These lumber sizes are typically described in inches in the United States and in millimeters in most other countries. 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. Dimensional lumber is cut and finished lumber (planed on all four sides) that comes in standardized sizes. For example: a 2-by-4 actually measures 1 1/2 inches thick and 3 1/2 inches wide. Lumber for construction purposes available in variety of different sizes. A four-by-six post measures 3 1/2 inches by 5 1/2 inches. 2x4s are not actually 2 inches by 4 inches. Here are the common sizes of lumber, and their actual sizes. What is dimensional lumber? The two numbers used to describe a piece of dimensional lumber… However, the actual dimensions are 1 1/2 inches by 3 1/2 inches. If you are using rough-sawn, or "true dimension" timbers, however, 4 inches means 4 inches. The change in dimensions usually results because of the milling processes the lumber is taken through and sometimes because of the size … It's important to remember this when purchasing lumber, because mixing nominal and actual dimensions … Lumber Dimensions. It also standardizes milling and makes the market more competitive. Knowing lumber sizes in advance helps reduce waste. For instance, using the most popular dimensional lumber, two-by-four, the nominal dimensions are 2-by-4. Of lumber, because mixing nominal and actual dimensions smaller than nominal sizes inches in United. Lumber for construction purposes available in variety of different sizes lumber,,. 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