AIR FORCE A-A-58207-1994 CROSSARMS WOOD《CROSSARMS 木材》.pdf
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1、A-A-58207 9999974 OLb483Y 675 I INCH-POUND 1 05 July 1994 A-A-5 8207 COMMERCIAL, ITEM DESCRIPTION CROSSARMS, WOOD The General Services Administration has authorized the use of this commercial item description as a replacement for Military Specification MIL-C- 12436, which has been canceled. 1. SCOPE
2、. This commercial item description covers treated and untreated crossarms. The crossarms shall be used for support and to space the wires on wooden telephone and electric poles. 2. SALIENT CHARACTERISTICS: 2.1 TvDe. The crossarm typeluse and the width X depth shall be as specified in the contract or
3、 order. 2.2 Classification. Crossarms must be specified as treated or untreated. If treated, the crossarms preservative treatment of either creosote or pentachlorophenol shall be as specified in the contract or order. The retention of the preservative treatment must be specified in pounds per cubic
4、foot in accordance with AWPA Standards C1, C25, or C26. 2.3 Species. The species of wood, Douglas Fir or Dense Southern Pine, for the crossarms must be as specified in the contract or order. Douglas Fir may be furnished in either dense or close grain grade or a mixture of both grades. 2.4 -. Wood us
5、ed in the manufacture of the crossarms shall be kiln dried or air dried to a moisture content of 22 percent or less. Moisture content shall be determined prior to treatment. 2.5 Dimensions. The length, boring details, pin hole arrangement, brace bolt hole spacing, and incising shall be as specified
6、in contract or order. Tolerances for these dimensions shall conform to the requirement of ANSI 05.3. 2.6 Edges. The edges shall be rounded or chamfered as specified in ANSI 05.3 Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this docum
7、ent should be sent to: WR-ALUTILCC 255 Second St., Robins AMSC N/A FSC 5510 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. AFB, GA 31098-1637 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-A-A-58207 m 9999974 03648
8、35 501 m A-A-58207 2.7 Identification marking. Each crossarm shall be marked with typical brand and key information contained in AWPA M6. The information shall be permanently and legibly burn- branded on the crossarm or shall include the information of a recessed noncorrosive metal tag attached ther
9、eto. The code letters shall not be less the 1/2 inch high if burn-branded, and not less the 1/8 inch high if on a metal tag; the metal tags shall be attached after treatment, if treated. ABC0 = Suppliers brand 91 SPC 8 = Year of treatment, if applicable = Species of wood and preservative treatment =
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