Also found in: Dictionary, Thesaurus, Encyclopedia, Wikipedia. counterpart. n. in the law of contracts, a written paper which is one of several documents which constitute a contract, such as a written offer and a written acceptance. Often a contract is in several counterparts which are the same but each paper is signed by a different party, particularly if they are in different localities.
dimension lumber. Joists, planks, rafters and other standard commodity lumber that usually range in width from 1 to 2 inches, in thickness from 2 to less than 5 inches, and in length from 3 to 12 feet. quality process
Lumber (American English; timber in Australian English, British English, Hiberno-English, and New Zealand English) is wood that has been processed into beams and planks, a stage in the process of wood production.Lumber may be supplied either rough-sawn, or surfaced on one or more of its faces.n Australia, Ireland, New Zealand and Britain, the term timber describes sawn wood products, such as floor boards. In the United States and Canada, generally timber describes standing or felled trees, before they are milled into boards, which are called lumber.