Lumber or timber is wood in any of its stages from felling through readiness for use as structural material for construction, or wood pulp for paper production. often refers to the wood contents of standing, live trees that can be used for lumber or fiber production, although it can also be used to describe sawn lumber whose smallest dimension isn't less than 5 inches (127 mm). Lumber is supplied either rough or finished. Besides pulpwood, rough lumber is the raw material for furniture-making a… (More on Lumber)