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 the United Kingdom, the word lumber is rarely used in relation to wood, and timber is almost universally used in its place; but lumber has several other meanings in Britain, including unused or unwanted items.