Reso 2007-1103 - Laserfiche WebLink

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u l N I [��d M l 0 minimum of 2.50 Ib /ft3 [40.1 kg /M31 of CCA oxides shall be retained in the outer 0.60 inch [15.2 mm]. All guardrail material (timber posts, blocks, wedges, etc.) shall retain a minimum of 0.40 Ib /ft3 [6.4 kg /M3] of CCA or ACQ -D or CA -B at 0.21 Ib /ft3 [3.3 kg /M3] in the outer 1 inch [25 mm] zone. 955 -5.3 Posts: Round /sawn timber fence posts shall retain a minimum of 0.40 Ib /ft3 [6.4 kg /mi] of ACQ -D or 0.21 lb /f3 [3.3 kg /m3]of CA-13 in the outer 1 inch [25 mm] zone. 955 -5.4 Determination of Retention: Retention shall be determined by assay performed and certified by the treating company in accordance with the applicable AWPA standards. 955 -6 Penetration Requirements. 955 -6.1 For Structural Timber: The penetration of the treatment shall be in accordance with the applicable AWPA standards, with the exceptions as specified herein. 955 -6.2 For Round Piles and Fence Posts: Any round pile or post, which does not show complete sapwood penetration will be rejected or shall be retreated to meet such penetration requirement. 955 -6.3 Retreatment: The necessity for retreatment of structural timber, piling and posts shall be avoided as far as practicable and if it becomes apparent that due measures are not being taken to prevent such necessity, the acceptance of retreated materials may be withdrawn. When retreatment is necessary the maximum limits for temperature of steam or preservative, and for preservative pressure, which apply to the original treatment shall not be exceeded during the retreatment. 955 -6.4 Determination of Penetration: Sapwood penetration shall be determined by taking at least one increment boring core from each pile and cap, and other pieces of similar dimensions and, for other sizes of material, at least one boring from the charge for each 1,000 FBM [2 m31 in the charge. All bored holes shall be immediately plugged, with tight fitting treated plugs. 955 -7 Handling Salt Treated Piling. In handling of piles that have been treated with chromated copper arsenate or ammoniacal copper arsenate, cable slings shall be used. Mechanical grabbers or pointed tools shall not be permitted. Rough or careless handing shall be avoided at all times. 955 -8 Identification of Treating Plants for Round Piling. The treating plant shall brand, or place a distinctive permanent mark, on each round pile, approximately 6 feet [2 ml from the butt end, such that the plant responsible for the treatment can be readily determined at any time during the service life of the piling. March 2007 01000 -185 03- 4122.D'