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<br />..... <br /> <br />. <br /> <br />..., <br /> <br />. <br /> <br />.., <br /> <br />955 LUMBER AND TIMBER TREATMENT (INCLUDING TREATING MATERIALS). <br />(REV 5-25-05) (FA 6-30-05) (1-06) <br /> <br />. <br /> <br />SECTION 955 (Pages 867-869) is deleted and the following substituted: <br /> <br />II <br />. <br /> <br />SECTION <br />TIMBER <br />(INCLUDING TREATING MATERIALS) <br /> <br />955 <br />TREATMENT <br /> <br />M <br /> <br />- <br /> <br />, <br /> <br />955-1 General. <br />The work specified in this Section is the treating of structural timber, timber piling <br />and timber posts. The method of treatment for all such timber materials shall be in <br />accordance with the American Wood Preservers' Association (AWPA) Use Category <br />Standard (USC) - U 1, with the exceptions and additions as specified herein. <br /> <br />. <br /> <br />..., <br /> <br />. <br /> <br />, <br /> <br />955-2 Preservative. <br />955-2.1 Salt or Brackish Water Use: The treating of Southern Yellow Pine (SYP) <br />lumber or timber for use in salt or brackish water environments shall be done with <br />Chromated Copper Arsenate (CCA). <br />955-2.2 Above Ground or Ground Contact and Fresh Water Immersion Use: The <br />treating of SYP lumber and timber for above round or ground contact and fresh water <br />immersion applications, shall be done with Copper Azole-Type B (CA-B), Amine Copper <br />Quat-Type D (ACQ-D), or CCA, with the following exceptions: <br />Treatment of the wood products of the pedestrian bridges, wood rails at <br />buildings or rest areas, and fence posts shall be done either with Copper Azole-Type B <br />(CA-B) or Amine Copper Quat-Type D (ACQ-D). <br /> <br />I' <br /> <br />. <br /> <br />II <br />. <br /> <br />., <br /> <br />. <br /> <br />.., <br /> <br />955-3 Process. <br />All timber and lumber items shall be treated in accordance with standard T1 of the <br />AWPA manual. <br /> <br />- <br /> <br />. <br /> <br />..., <br /> <br />955-4 Requirements for Preservative Materials. <br />Amine Copper Quat-Type D (ACQ-D), Chromated Copper Arsenate (CCA), Copper <br />Azole-Type B (CA-B), Ammoniacal Copper Zinc Arsenate (ACZA) shall be in accordance <br />with AWPA P5. <br /> <br />. <br /> <br />..., <br /> <br />. <br /> <br />955-5 Requirements for Retainment. <br />955-5.1 Piling :A minimum of 2.50 Ib/ft3 [40.1 kg/m3] of CCA oxides shall be <br />retained in zone 1, outer 0.50 inch [12.7 mm], and 1.5 Ib/ft3 [24.0 kg/m3] in zone 2, outer <br />0.50 to 2 inches [12.7 to 51 mm]. <br />If ACZA is used, a minimum of 2.50 Ib/ft3 [40.1 kg/m3] shall be retained in <br />zone 1, outer 0.50 inch [12.7 mm], and 1.5 Ib/ft3 [24.0 kg/m3] in zone 2, outer 0.50 to 2 <br />inches [12.7 to 51 mm]. <br />955-5.2 Structural Timber and Sheet Piles: When installation is not in a salt (or <br />brackish) water environment, the minimum retention shall be 0.60 Ib/ft3 [9.6 kg/m3] of <br />CCA or ACQ-D or 0.31 Ib/ft3 [5.0 kg/m3] CA-B, as determined by cores from the outer <br />0.60 inch [15.2 mm]. When installation is in a salt (or brackish) water environment, a <br /> <br />., <br /> <br />. <br /> <br />-. <br /> <br />. <br /> <br />II <br />. <br /> <br />.... <br /> <br />. <br /> <br />roo, <br /> <br />09/09 <br /> <br />01000-184 <br /> <br />03-4122.F <br /> <br />. <br />