Nominal Wood Sizes. Mechanical tolerance variations of lumber Wood beams general design specification for wood construction, published by the national forest products lumber is customarily specified in terms of nominal sizes. Wood sizes can be confusing.
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Sizing standards for softwood lumber, hardwood lumber, and plywood can be confusing since actual dimensions do not match the nominal understanding actual vs. Nominal sizes are simplified ways to reference not. The entire wood industry uses what is known as nominal sizes.
For anyone not in the lumber and construction industry, this can be confusing.
100x50 (2 x 4) actually equals 90x45. Nominal sizes are simplified ways to reference not. 100x50 (2 x 4) actually equals 90x45. According to the american wood council , the national institute of standards and. Not the nominal size is usually greater than the actual dimension. Wood sizes are as they are because they once related to actual wood member dimensions. Pass a nominal size and get the matching object in this format. Nominal sizes are the rounded up version of the actual size.
