North American log plank is original to a long according to size, shape, quality standard or special provisions of cut into logs, the length logs called the logs. North American log sheet in construction, furniture, craft sculpture and papermaking, etc. are great purposes. Lumber use: divided into direct use and by chemical or special processing materials to use. Wood use directly: architecture, timbers, electricity column, sleepers, packaging, furniture, craft sculpture, ships, sports equipment, cultural and educational supplies, Musical Instruments, decoration etc