Lumber may be supplied either rough-sawn, or surfaced on one or more of its faces. 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 (collectively known as Spruce-pine-fir), cedar, and hemlock, but also some hardwood, for high-grade flooring.
Lumber is mainly used for structural purposes but has many other uses as well. Lumber is classified as hardwood or softwood.
Wood items are normally highly prized on water worlds such as Nilfeheim, and among collectors and decorators. Most medium and low population worlds (Terra, Garden Eden, Planet Miramar and etc.) grow trees for timber, either for local use or export.