Technical
Units and Measurements
4/4 Lumber - Kiln Dried Hardwoods measuring 1" rough thickness. (Note: 4/4 lumber will finish plane on both faces at a maximum thickness of 13/16")
5/4 Lumber - Kiln Dried Hardwoods measuring 1-1/4" rough thickness. (Note: 5/4 lumber will finish plane on both faces at a maximum thickness of 1-1/16")
6/4 Lumber - Kiln Dried Hardwoods measuring 1-1/2" rough thickness. (Note: 6/4 lumber will finish plane on both faces at a maximum thickness of 1-5/16")
8/4 Lumber - Kiln Dried Hardwoods measuring 2" rough thickness. (Note: 8/4 lumber will finish plane on both faces at a maximum thickness of 1-13/16")
Board Foot (NET) - A board foot is a volume measurement. Linear dimensions of the board are simply a function that provide the formula for calculation. Equal to 1/12th of a cubic foot, the board foot takes into account the actual thickness of the board.
Random Width and Length (RWL) - The fact that hardwoods are almost always offered in a random width and length assortment can present something of a mystery. Hardwood lumber is cut to yield the highest grade and maximum of usable material while minimizing waste. Both widths and lengths are, therefore, random and even the best grades allow occasional defects.