standard us lumber sizes

The term dimensional lumber came into popular use around the beginning of the 20th century to distinguish lumber cut to pre-determined sizes from other types of wood such as corded wood for fireplaces. During this period the building industry sought to control costs and minimize waste by developing standard sizes and grades for building timber. 【Get Price】

The old standard of calling this board a 2 x 4 still remains even though in today's lumber practices the board has never been 2 x 4 inches in size. The actual vs. nominal sizes for common sizes of dimension lumber: 【Get Price】

Commercial Lumber Sizes Chart Table. The following data is standard reference and size data for commercially available lumber within the USA. All data is in imperial units (Inches). Mechanical Tolerance Variations of Lumber: Per. Voluntary Product Standard PS 20-05 American Softwood Lumber Standard. Dimension lumber can be purchased as dry or ... 【Get Price】

In 1961 at a meeting in Scottsdale Arizona the Committee on Grade Simplification and Standardization agreed to what is now the current U.S. standard: in part the dressed size of a 1-inch (nominal) board was fixed at 3 ⁄ 4 inch; while the dressed size of 2 inch (nominal) lumber was reduced from 1 5 ⁄ 8 inch to the current 1 1 ⁄ 2 inch. 【Get Price】

Softwood Lumber Dimensions. Softwood lumber is generally used for framing walls and floors. In the United States softwood lumber is governed by the National Institute of Standards American Softwood Lumber Standard (PS 20). North American Standard 1-by Lumber 【Get Price】

Lumber for construction purposes available in variety of different sizes. Nominal dimensions which identify certain board beam or post do not represent its actual parameters. Lumber measurements in width and thickness normally 0.25 inches (6 millimeters) – 0.75 in (19 mm) smaller than nominal sizes. 【Get Price】

What Are Standard Lumber Sizes?. The American Lumber Congress first established nationwide standards for lumber dimensions in 1924 in the midst of the construction boom that followed World War I. 【Get Price】