Lumber
Lumber or
timber is a collective term for harvested wood that has been manufactured into boards and planks. This process is part of something called wood production. Lumber is predominantly used for structural purposes but has many other uses as well. Lumber is classified as hardwood or softwood. Lumber is supplied either rough-sawn as it came off of the saw or surfaced on one, two, three or all four sides. Besides pulpwood,
rough lumber is the raw material for furniture-making and other items requiring additional cutting and shaping. It is available in many species, usually hardwoods, but it is also readily available in softwoods such as white pine and red pine because of their low cost.
Finished lumber is supplied in standard sizes, mostly for the construction industry, primarily softwood from coniferous species including pine, fir and spruce, cedar, and hemlock, but also some hardwood, for high-grade flooring.