DLA RR-F-191 1 F-2008 FENCING WIRE AND POST METAL (CHAIN-LINK FENCE FABRIC).pdf

1、 INCH-POUNDRR-F-191/1F 2 May 2008SUPERSEDING RR-F-191/1E1 June 2006 FEDERAL SPECIFICATION SHEET FENCING, WIRE AND POST METAL (CHAIN-LINK FENCE FABRIC) The General Services Administration has authorized the use of this federal specification sheet by all Federal agencies. (This specification forms a p

2、art of the latest issue of Federal specification RR-F-191/GEN). 1. SCOPE AND CLASSIFICATION 1.1 Scope. This specification covers requirements for chain-link fabric. 1.2 Classification. Chain-link fabric will be of the following types, mesh sizes, wire gage size, and fabric height ass specified (see

3、6.1): Type I - Zinc-coated steel. Type II - Aluminum-coated steel. Type III - Aluminum alloy Type IV - Polyvinyl chloride (PVC) coated over zinc or aluminum coated steel. Type V - Zinc-5% aluminum-mischmetal alloy coated steel wire (Zn-5Al-MM) Mesh size in inches: 1 inch (9 and 11 wire gage size onl

4、y). 1-3/4 inch (all wire gage sizes). 2 inch (all wire gage sizes). 2-1/8 inch (all wire gage sizes). Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center Philadelphia, ATTN: DSCP-NASA, 700 Robbins Ave, Philadelphia, PA 19111-5096 or emailed to dscpg 9 g

5、age 1290 pounds; and 6 gage 2170 pounds. The breakload for aluminum alloy is 9 gage 925 pounds; 6 gage 1560 pounds. 3.3 Wire gage size. Wire for fabric shall be of the wire gage size selected (see 1.2 and 6.1). The outside diameter cited in 1.2 is the metal wire diameter allowable for that wire gage

6、 size and includes the metallic coating. When type IV wire required, the wire gage shall be that of the core wire only, the PVC coating shall not be considered when determining wire size. Tolerance for wire size 0.005 inches. 3.4 Type I, zinc-coated steel wire. Unless otherwise specified (see 6.1),

7、the minimum weight of coating on the wire shall be 1.2 ounces of zinc per square foot of coated surface area when determined in accordance with 4.4.2.1. 3.5 Type II, aluminum-coated steel wire. The minimum weight of aluminum coating for 6- and 9- gage wire shall be 0.4 ounces per square foot. The mi

8、nimum weight of aluminum coating for 11-gage wire shall be 0.35 ounces per square foot. Weight of aluminum shall be determined in accordance with 4.4.2.2. 3.6 Type III, Aluminum alloy wire. The aluminum wire shall conform to the requirements of ASTM B211, alloy 6061-T94. 3.7 Type IV, PVC coated over

9、 zinc or aluminum coated steel wire. The PVC coating shall meet the requirements of 3.7.1 thru 3.7.4. Minimum thickness of the PVC coating shall be 0.007 inches as determined in 4.4.4.1. Unless otherwise specified (see 6.1), the method of applying the PVC coating (see 6.4) shall be the manufacturers

10、 option. Minimum weight of zinc coating on the steel wire shall be 0.4 ounces per square foot for 6 gage and 0.3 ounces per square foot for 9 and 11 gage. Aluminum coated steel wire shall meet the requirements of 3.5. 3.7.1 Color of PVC-coated wire. The color of PVC-coated wire shall be one of the s

11、tandard colors (dark green, olive green, brown or black) cited in ASTM F934 as specified (see 6.1). When colors not cited in ASTM F934 are required, the color shall be as specified (see 6.1). 3.7.2 Weaveability to PVC coated wire. PVC coated wire shall be capable of being woven in to fabric without

12、the PVC coating cracking, crazing, or peeling. 3.7.3 Accelerated ageing of PVC coating. PVC coating shall not shrink more than 1/16 inch per foot of length, demonstrate a significant visual change in color or gloss, or exhibit breaks, cracks, crazing, crumbling, or other visual forms of failure when

13、 tested in accordance with 4.4.4.2. 3.7.4 Flexibility of PVC coating. PVC coating shall demonstrate flexibility by exhibiting no breaks, cracks, crazing, crumbling, or other visual forms of failure of the coating when tested in accordance with 4.4.4.3. 3 Provided by IHSNot for ResaleNo reproduction

14、or networking permitted without license from IHS-,-,-RR-F-191/1F 3.8 Type V, Zinc-5% aluminum-mischmetal alloy coated steel wire (Zn-5Al-MM). The coated steel wire shall conform to the requirements of ASTM F1345, Class 1 (minimum coating weight of 0.60 ounces per square foot). 3.9 Mesh size. The mes

15、h size for fabric shall be one of the sizes selected (see 1.2). The mesh size shall be the inside measurement of the diamond shape of the tensioned fabric as determined in 4.3.2. Tolerance for mesh size is 1/8 of an inch. 3.10 Diamond count. Unless otherwise specified (see 6.1), the diamond count sh

16、all be the manufacturers standard. All diamond counts shall be consistent within a lot. 3.11 Selvage. Unless otherwise specified (see 6.1), the fabric will be furnished with standard selvages as follows: (a) Fabric up to and including 60 inches high with 2-inch mesh shall be knuckled at the top and

17、bottom selvages. (b) Fabric over 60 inches high 2-inch mesh shall be twisted on the top selvage and knuckled on the bottom selvage. (c) Fabric of all heights with 1-inch or 1-3/4 inch mesh shall be knuckled at the top and bottom selvages. When specified (see 6.1), fabric shall be provided with one o

18、f the following selvage types: (a) Knuckled at both selvages. (b) Knuckled at one selvage and twisted at the other. (c) Twisted at both selvages, except on fabric with 1-inch mesh. 3.11.1 Knuckled. Loops of knuckled selvage shall be closed or nearly closed with a space not exceeding the diameter of

19、the wire. 3.11.2 Twisted. Wire shall be twisted in a closed helix of 1-1/2 machine turns equivalent to three full twists, and cut at an angle to provide sharp barbs. The wire ends beyond the twist shall be at least 1/4-inch long (see 4.3.3). 3.12 Fabric height. Fabric height shall be of the selected

20、 1 inch (see 1.2 and 6.1), as determined by 4.3.4. Tolerance for fabric height is 1 inch. 3.13 Fabric length. Unless otherwise specified (see 6.1), the standard length of fabric roll shall be 50 linear feet 1 percent as determined by 4.3.5. Each roll of fabric shall be a one-piece length. 4. QUALITY

21、 ASSURANCE PROVISIONS. 4.1 Responsibility for inspection. (See RR-F-191/GEN) 4.2 Sampling. (See section 6 of RR-F-191/GEN) 4.3 Examination. Examine fabric for defects listed in table II. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RR-F-191/1F T

22、ABLE II. Classification of defects. Defects Major Minor Height of fabric not as specified. Diamond count not as specified. Length of wire not as specified. Size of wire not as specified. Size of wire not as specified. Type of wire not as specified. Selvage not as specified. Color not as specified. B

23、arbs on twisted and barbed selvage not sharp. Frozen joints on zinc-coated fabric. Coating cut, scratched, or abraded exposing bare wire. Plastic coating cracked, crazed, or peeling. X X X X X X X X X X X X 4.3.1 Wire gage. Determine the diameter of types I, II, III and V wire by averaging two diame

24、ter measurements of the wire taken at right angles to each other (see 1.2 and 3.3.) The diameter of type IV wire shall be determined as above after removal of the PVC coating. 4.3.2 Size of mesh. Measure the clear distance in either direction between the wires forming the parallel sides of the mesh

25、taking the mean of two dimensions at right angles to each other (see 1.2 and 3.9). 4.3.3 Length of barbs. Measure the wire ends along the inside of the twist from the last twist to the tip of barbs in twisted and barbed selvage (see 3.11.2). 4.3.4 Height of fabric. Measure the height with tension ap

26、plied, between outer extremities of the fabric, including the overall dimension form ends of barbs or knuckles (see 3.12). 4.3.5 Length of fabric. When in rolls, measure the length by unrolling the rolls on a flat surface and apply tension to remove slack. Tension applied shall not reduce the actual

27、 height of the fabric by more than 1/16 inch per foot of height or by more than 1/2 inch in overall height, whichever is less (see 3.13). 4.4 Test methods. 4.4.1 Specimens. At least two specimens for each test shall be obtained from one linear foot of fabric cut from one of the rolls selected in acc

28、ordance with 4.2. 4.4.2 Weight and thickness of metallic coatings. 4.4.2.1 Zinc and Zn-5Al-MM coat. Determine weight of zinc and Zn-5Al-MM in accordance with ASTM A90 (see 3.4 and 3.7). 4.4.2.2 Weight of aluminum coat. Determine weight of aluminum coating in accordance with ASTM A428 (see 3.5). 5 Pr

29、ovided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RR-F-191/1F 4.4.3 Tensile test of steel wire. The steel wire shall be tested for tensile strength in accordance with ASTM A370 (see 3.2). 4.4.4 PVC coating tests. 4.4.4.1 PVC coating thickness. Determine

30、thickness of PVC coating by stripping the coating and measuring the diameter of the wire as in 4.3.1. One-half the difference between this measurement and the outside diameter of the coated wire will be used to determine the thickness of the coating for conformance to 3.7. 4.4.4.2 Accelerated aging

31、of a PVC coated wire. A sample of PVC coated wire from which the fabric is woven shall be subjected to accelerated aging by exposure for 1,000 hours at a black panel temperature of 145 9 Fahrenheit (F) (63 5 Celsius (C) in accordance with ASTM D1499. After completion of this aging, the coated wire s

32、hall be examined to determine compliance with 3.7.3. Shrinkage of the coating of more than 1/16 inch per foot of length, significant visual change in color or gloss, or breaks, cracks, crazing, crumbling, or other visual forms of failure shall be cause for rejection. In addition, samples of the coat

33、ed wire which have completed this aging process must meet the requirements of the mandrel bend test of 4.4.4.3. 4.4.4.2.1 Frequency of test. Unless otherwise specified (see 6.1), the test for accelerated aging shall be performed on the initial inspection, and thereafter only when changes are made in

34、 the PVC coating. 4.4.4.3 Mandrel bend test. After the sample has been subjected to the accelerated aging of 4.4.4.2, it shall be tested as follows: A 12-inch length of PVC coated wire removed from the fabric, including bends and straight sections, but not including twists or knuckles, shall be used

35、 as the sample. This sample shall be cold soaked at -20 F (-29 C) for 1 hour. The sample shall be removed from the cold source and within 30 seconds wrapped around a mandrel one complete turn (360). The mandrel shall have a maximum diameter of 10 times the outside diameter of the wire being tested.

36、The coating on the wire shall exhibit no breaks, cracks, crazing, crumbling or other visual forms of failure after completion of this test (see 3.7.4). 5. PREPARATION FOR DELIVERY (See RR-F-191/GEN) 6. NOTES (This section contains information of a general or explanatory nature that may be helpful, b

37、ut is not mandatory.) 6.1 Ordering data. Purchasers should select the preferred options permitted herein and include the following information in acquisition documents: a. Title, number, and date of this specification. b. Size required (see 1.2). c. Type, mesh, size, wire gage size, and fabric heigh

38、t required (see 1.2, 3.3, 3.9, and 3.12). d. When the steel wire is other than specified (see 3.2). e. When weight of zinc or Zn-5Al-MM coating is other than specified (see 3.4). f. When method of applying the PVC coating is not manufacturers option and method specified (see 3.7 and 6.4). 6 Provided

39、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-RR-F-191/1F g. Color of PVC coated wire is other than cited and color required (3.7.1). h. When color of PVC coated wire is other than cited and color required (see 3.7.1). i. When diamond counts are not as spe

40、cified and diamond count required (see 3.10). j. Type of selvage if other than standard (see 3.11). k. Length of fabric if other than standard (see 3.11). l. Frequency of test for accelerated aging of PVC coated wire (see 4.4.4.2.1). 6.2 Zinc-coated fabric. The surface of zinc coatings, particularly

41、 those produced by hot-dip galvanizing, are not always smooth and devoid of irregularities. Such irregularities ordinarily do not warrant rejection of zinc-coated fabric. Thickness of the zinc coat can be determined, using 1.2 ounces of zinc per square foot equivalent to a coating thickness of 2.0 m

42、ils (0.0020 inch) (see 3.4 and ASTM A392 for more zinc-coated wire thickness option). 6.3 Aluminum-coated fabric. Discoloration of the wire and rust formations on the cut ends are inherent characteristics of this material and does not warrant rejection of aluminum-coated fabric. Thickness of the alu

43、minum coat can be determined using 1 ounce of aluminum per square foot of surface equivalent to a coating thickness of 4.35 mils (0.00435 inch) (see 3.5). 6.4 PVC coated fabric. There are different PVC coated fabrics on the market . Some of the ways in which they may vary are: The methods of applyin

44、g the PVC coating, wall thickness of the PVC coating, adhesion of the PVC coating to the wire, and cost. These factors should be taken into consideration when selecting a fence fabric for different environmental applications. 6.5 Changes from previous issue. The margins of this specification are mar

45、ked with vertical lines to indicate where changes (additions, modifications, corrections, deletions) from the previous issue were made. This was done as a convenience only, and the Government assumes no liability whatsoever for any inaccuracies in these notations. Bidders and contractors are caution

46、ed to evaluate the requirements of this document based on the content irrespective of the marginal notations and relationship to the last previous issue. Custodians: Preparing activity: Army-CR4 DLA-IS Navy-YD Air Force-99 (Project 5660-2008-002) Review activities: Army-CE Navy-MC, CG Air Force-84 N

47、OTE: The activities listed above were interested in this document as of the date of this document. Since organizations and responsibilities can change, you should verify the currency of the information above using the ASSIST Online database at http:/assist.daps.dla.mil7 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-