A-A-52520B
kg/m3 (0.040 pcf) of copper as measured by the assay method for the zone of 0 to 15 mm (0 to 0.6 inches). The copper naphthenate used in the treating solution shall comply with AWPA P8. The solution shall contain 2 percent copper but not less than 68 grams of copper per gallon at 16°C (60°F).
c. If further modification is required after treatment, any new exposed surfaces from machining, cutting or trimming shall be treated with preservative.
d. After treatment, the wood shall be free of tack and shall provide a paintable surface following 72 hours of drying. The surface of the treated dried wood shall be free from waxy, greasy, or oily deposit removable by rubbing with the finger and free from any glossy film resembling that of varnish. The paintable surface shall be compatible with Chemical Agent Resistant coatings MIL-DTL-53072 used by the military.
2.4 Hardwood defects. Material used in the fabrication of floorboard components shall conform to the requirements of 2.4 through 2.6.
2.4.1 Knots. No unsound knot or hole shall be permitted. Sound knots will be permitted, up to and including 25.4 mm (1 inch) in diameter. The sum of the diameters of all sound knots in any one-fourth length of a piece shall not exceed the width of the piece, nor shall any two knots of 25.4 mm (1 inch) or more in diameter be closer to each other than 20 centimeters (cm) (8 inches).
2.4.2 End splits. End splits, exceeding the width of the piece in length, shall not be permitted. End splits shall only be allowed in one end of board.
2.4.3 Warping. Maximum warping shall not exceed 12.7 mm (0.5 inch) per 30.5 cm (12 inches) length as defined in NHLA Rules for the Measurement of Hardwood and Cypress.
2.4.4 Hit-or-miss surfacing. Hit-or-miss surfacing, with skips not over 1.6 mm (0.06 inch) deep between them, shall be permitted on the underside of the floorboards, but all floorboards shall be full thickness at the ends and over the cross bolsters.
2.4.5 Wood destroying organism defects. Open channels not more than 3 mm (0.13 inch) deep and 12.7 cm (5 inches) long will be permitted on the face of the board. On the underside of the board, channels shall be not greater than 6 mm (0.25 inch) wide and 20 cm (8 inches) long. No defects shall extend through the thickness of the piece.
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business