Dimension lumber, also known as dimensional lumber, is the common term for lumber cut to standard width and depth, and it is measured by inches. Common sizes are 2X4’s, 2X6’s, and 4x4’s.
Dimension lumber is often called by these names, two by fours, two by sixes, etc. and it is not length specific. In other words, dimension lumber concerns the width and depth of the piece of dimension lumber, not the length of it.
Standard Lengths of Dimension Lumber
Lengths of dimension lumber, however, do come in standard lengths. In the United States, these measurements come in 6, 8, 10, 12, 14, 16, 18, 20 22, and 24 foot lengths. Dimension lumber can be bought in pre-cut studs, for framing and other purposes, which will save a carpenter time in certain applications.
Dimension lumber is generally used for rougher construction, so it is commonly made from softwoods such as pine. Hardwood boards are more often used in the making of fine furniture and cabinetry.