木材 軟質材

Preservative, tt-w-571 treatment type, acid copper chromate or ammoniacal copper arsenite or chromated copper arsenate, type i, ii or iii or coal-tar creosote or creosote coal-tar solution or creosote petroleum solution or pentachlorophenol in heavy petroleum solvent or pentachlorophenol in light petroleum solvent or pentachlorophenol in volatile solvent preservative solution type, any acceptable no. 1 northeastern lumber manufacturers association or any acceptable no. 1 northern hardwood and pine manufacturers association or any acceptable no. 1 structural west coast lumber inspection bureau or any acceptable no. 1 western wood products association or pine, southern no. 1 sr timbers southern pine inspection bureau or redwood no. 1 structural redwood inspection service species-grade and grading association, 10 ft and longer with a max of 1 pct to be 10 ft and a min of 50 pct to be 14 t and longer random length, 12.000 inches nominal overall specified width-location and measuring method, 10.000 feet minimum random measuring method and length

由任何針葉樹製成的木材，橫截面尺寸為5英寸（127.0毫米）x 5英寸（127.0毫米）或更大。