Lumber / timber is thick planks / planks that are sawn from a log tree. Sawn timber is used mainly for construction purposes or to make furniture, to manufacture paper and even plywood (plywood).
Sawn timber is classified into two main categories as hardwood lumber and softwood lumber. Sawn timber from softwood trees is easy to saw and chisel, so is often used to make furniture, produce paper or build houses for residential areas. Meanwhile, lumber from hardwood trees is often used in the manufacture of furniture, pallets and flooring.