1、Standard Specification for Metallic-Coated (Carbon) Steel Barbed Wire AASHTO Designation: M 280-14 ASTM Designation: A121-13 American Association of State Highway and Transportation Officials 444 North Capitol Street N.W., Suite 249 Washington, D.C. 20001TS-4d M 280-1 AASHTO Standard Specification f
2、or Metallic-Coated (Carbon) Steel Barbed Wire AASHTO Designation: M 280-14 ASTM Designation: A121-13 1. SCOPE 1.1. This specification covers metallic-coated steel barbed wire, consisting of a strand of two wires. 1.2. The barbed wire is available with aluminum, zinc, and zinc-5 percent aluminum-misc
3、hmetal alloy coatings, with a number of coating weights, in a number of different construction (designs), and in two grades. Not all designs are available in all coating types. 1.3. The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for info
4、rmation only. 1.4. The text of this specification references notes and footnotes that provide explanatory information. These notes and footnotes (excluding those in tables) shall not be considered as requirements of the specification. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standard: T 65M/T 65, Mass We
5、ight of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings 2.2. ASTM Standards: A90/A90M, Standard Test Method for Weight Mass of Coating on Iron and Steel Articles with Zinc or Zinc-Alloy Coatings A428/A428M, Standard Test Method for Weight Mass of Coating on Aluminum-Coated Iron o
6、r Steel Articles A641/A641M, Standard Specification for Zinc-Coated (Galvanized) Carbon Steel Wire A700, Standard Guide for Packaging, Marking, and Loading Methods for Steel Products for Shipment A809, Standard Specification for Aluminum-Coated (Aluminized) Carbon Steel Wire A856/A856M, Standard Spe
7、cification for Zinc-5% Aluminum-Mischmetal Alloy-Coated Carbon Steel Wire A902, Standard Terminology Relating to Metallic Coated Steel Products 2.3. IEEE/ASTM Standard: SI 10, American National Standard for Metric Practice 2.4. Federal Standard: Fed. Std. 123, Marking for Shipment (Civil Agencies) 2
8、015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4d M 280-2 AASHTO 2.5. Military Standards: MIL-STD-129, Marking for Shipment and Storage MIL-STD-163, Steel Mill Products Preparation for Shipment and St
9、orage 3. TERMINOLOGY 3.1. DefinitionsFor definitions of terms used in this specification, refer to Terminology, ASTM A902. 4. CLASSIFICATION 4.1. The barbed wire covered by this specification is classified as described in this section. 4.2. Design NumberNumbers describing standard sizes and construc
10、tions, as listed in Table 1. 4.3. Metallic Coating Type: 4.3.1. Coating Type AMade from aluminum-coated strand wire. 4.3.2. Coating Type ZMade from zinc-coated strand wire. 4.3.3. Coating Type ZAMade from zinc-5 percent aluminum-mischmetal alloy (Zn-5Al-MM) coated strand wire. 4.4. Metallic Coating
11、ClassThe specified amount of coating (coating weight mass) on the strand wire. 4.4.1. For coating Type A, see Section 6.3 (only one coating weight for each wire size). 4.4.2. For coating Type Z, see Table 2. 4.4.3. For coating Type ZA, see Table 3. 4.5. Grades: 4.5.1. Standard GradeBarbs spaced on 4
12、- or 5-in. (102- or 127-mm) centers as indicated in Table 1. 4.5.2. High-Security GradeBarbs spaced on 3-in. (76-mm) centers with Coating Type A only. Note 1The design numbers are related to the characteristics of the construction of the barbed wire, with the number groups related, in order, to the
13、steel wire gauge of the strand wires, number of barb points, spacing of barbs, steel wire gauge of the barbs, and a letter indicating the shape of the barbs. 5. ORDERING INFORMATION 5.1. Orders for material under this specification shall include the following information, as necessary, to describe t
14、he desired product: 5.1.1. Name of the material (steel barbed wire); 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4d M 280-3 AASHTO 5.1.2. Quantity (number of spools and length of barbed wire on ea
15、ch, or total length) (see Section 7.5 for standard size of spools); 5.1.3. Metallic coating type, (see Section 4.3); 5.1.4. Metallic coating class (for Types Z and ZA) (see Table 2 or Table 3); 5.1.5. Design number (see Table 1); 5.1.6. For Coating Type A barbed wire, whether aluminum-alloy barbs ar
16、e required or prohibited (see Section 6.2.1). If not stated, the choice shall be at the manufacturers option; 5.1.7. AASHTO designation and year of issue; and 5.1.8. Certification or test report, or both, if required. Note 2A typical ordering description is as follows: Steel barbed wire, 20 spools o
17、f 80 rods each, Coating Type Z, Coating Class 3, Design Number 12-2-4-14R, to M 280-_ with certification. 5.2. All spools of barbed wire accepted by the purchaser shall be billed on the basis of the original length of the spools before sampling unless changed by contractual arrangement. 2015 by the
18、American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4d M 280-4 AASHTO Table 1Standard Sizes and Constructions for Barbed Wire Design Number Size, Steel Wire Gauge Nominal Diameter of Coated Wire, in. (mm ) Number of
19、Barb Points Spacing of Barbs, in. (mm ) Diameter of Barbs, Steel Wire GaugeaShape of Barbs Metallic Coating Type A 12-4-3-14R 121/20.099 (2.51) 4 3 (76) 14 Round 12-4-5-14R 121/20.099 (2.51) 4 5 (127) 14 Round 12-4-3-12Rb121/20.099 (2.51) 4 3 (76) 12 Round Metallic Coating Type Z and Type ZA 12-2-4-
20、12F 121/20.099 (2.51) 2 4 (102) 121/2cFlat 12-2-4-13F 121/20.099 (2.51) 2 4 (102) 13 Flat 12-2-4-14R 121/20.099 (2.51) 2 4 (102) 14 Round 12-2-5-12F 121/20.099 (2.51) 2 5 (127) 121/2cFlat 12-2-5-14R 121/20.099 (2.51) 2 5 (127) 14 Round 12-4-5-14H 121/20.099 (2.51) 4 5 (127) 14cHalf-Round 12-4-5-14R
21、121/20.099 (2.51) 4 5 (127) 14 Round 13-2-4-14R 131/20.086 (2.18) 2 4 (102) 14 Round 13-4-5-14R 131/20.086 (2.18) 4 5 (127) 14 Round 14-2-4-14F 14 0.080 (2.03) 2 4 (102) 14 Flat 14-2-5-14F 14 0.080 (2.03) 2 5 (127) 14 Flat 14-4-3-14F 14 0.080 (2.03) 4 3 (76) 14 Flat 14-4-5-14F 14 0.080 (2.03) 4 5 (1
22、27) 14 Flat 14-2-5-14R 14 0.080 (2.03) 2 5 (127) 14 Round 14-4-5-14R 14 0.080 (2.03) 4 5 (127) 14 Round 15-2-5-13F 151/20.067 (1.70) 2 5 (127) 133/4cFlat 15-2-5-14R 151/20.067 (1.70) 2 5 (127) 14 Round 15-4-5-16R 151/20.067 (1.70) 4 5 (127) 161/2Round 15-4-3-16R 151/20.067 (1.70) 4 3 (76) 161/2Round
23、 a Nominal diameter of wire used in making barbs shall be as follows: 121/2gauge 0.099 in. (2.51 mm) 13 gauge 0.092 in. (2.34 mm) 133/4gauge 0.083 in. (2.11 mm) 14 gauge 0.080 in. (2.03 mm) 161/2gauge 0.058 in. (1.47 mm) bDesign Number 12-4-3-12R, Metallic Coating Type A, is High-Security Grade. All
24、 other design numbers are for standard grade. c The gauge of the half-round and flat barbs is designated by the gauge of the round wire from which the barbs are rolled.Table 2Minimum Weight of Coating on Type Z Barbed Wire Size, Steel Wire Gauge Nominal Diameter of Type Z Minimum Weight of Coating o
25、f Uncoated Wire Surface, oz/ft2 (g/m2) in. (mm) Class 1 Class 3 121/20.099 2.51 0.28 (85) 0.80 (245) 13 0.092 2.32 0.28 (85) 0.75 (230) 131/20.086 2.18 0.25 (75) 0.70 (215) 133/40.083 2.11 a 0.70 (215) 14 0.080 2.03 0.25 (75) 0.70 (215) 151/20.067 1.70 a 0.65 (200) 161/20.058 1.47 a 0.60 (185) a The
26、se sizes only furnished Class 3 Coating. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4d M 280-5 AASHTO Table 3Minimum Weight of Coating on Type ZA Barbed Wire Size, Steel Wire Gauge Nominal Diamet
27、er of Type ZA Minimum Weight of Coating of Uncoated Wire Surface, oz/ft2 (g/m2) Class in. mm Class 1 Class 3 Class 60 121/20.099 2.51 0.28 (85) 0.80 (245) 0.60 (185) 13 0.092 2.34 0.28 (85) 0.75 (230) 0.60 (185) 131/20.086 2.18 0.25 (75) 0.70 (215) 0.60 (185) 133/40.083 2.11 0.25 (75) 0.70 (215) 0.6
28、0 (185) 14 0.080 2.03 0.25 (75) 0.70 (215) 0.60 (185) 151/20.067 1.70 0.20 (61) 0.65 (200) n/a 161/20.058 1.47 0.20 (61) 0.60 (185) n/a 6. MATERIAL 6.1. Base MetalThe base metal of the steel strand wires and steel barbs shall be of a good commercial quality carbon steel, capable of meeting the break
29、ing strength requirement in Section 7.6. The base metal for aluminum barbs (permitted with metallic Coating Type A) shall be aluminum alloy wire conforming to Alloy 5000-H38, Alloy 6061-T94, or equal. 6.1.1. For Coating Type A barbed wire, the choice of whether aluminum-coated steel wire or aluminum
30、 alloy wire for the barbs shall be that of the manufacturer, unless otherwise specified by the purchaser. If aluminum alloy wire is used, the particular alloy shall be agreed upon between the manufacturer and the purchaser at the time the order is placed. 6.2. Coating MaterialsThe coating on the wir
31、e shall conform with the requirements of the following specifications: 6.2.1. Coating Type AAluminum-coated wire in accordance with ASTM A809. 6.2.2. Coating Type ZZinc-coated wire in accordance with ASTM A641/A641M. 6.2.3. Coating Type ZAZinc-5 percent aluminum-mischmetal alloy (Zn-5Al-MM) coated w
32、ire in accordance with ASTM A856/A856M. 6.3. Coated WireThe steel wire shall be coated before fabrication. 6.3.1. Weight of Coating Requirements for Strand WiresThe strand wires for Types Z and ZA barbed wire, as represented by the test specimens, shall conform to the requirements of Tables 2 and 3
33、respectively for the minimum coating weight for the type and class ordered. The strand wire for Type A barbed wire, as represented by the test specimens, shall have a minimum coating weight of 0.30 oz/ft2 (90 g/m2) on the 121/2-gauge wire. 6.3.2. Weight of Coating Requirements for BarbsThe wire for
34、barbs for Types Z and ZA barbed wire, as represented by the test specimens, shall conform to the same coating class requirements as the strand wire. The steel wire for barbs for Type A barbed wire, as represented by the test specimens, shall have a minimum coating weight of 0.25 oz/ft2 (75 g/m2) on
35、the 14-gauge wire. 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS-4d M 280-6 AASHTO 7. GENERAL REQUIREMENTS 7.1. The sizes and constructions for barbed wire furnished under this specification shall b
36、e in accordance with the requirements of Table 1 for the Design Number specified in the order, within the tolerances stated in Section 8. 7.2. The barbs shall be sharp, well formed, and tightly wrapped. The barb points shall be sharp and properly shaped. 7.3. The strand wires shall be twisted with a
37、 uniform length of lay. Type Z and Type ZA barbed wire shall have the twisting consistently in one direction (left or right) or alternating between the left and right directions. Type A barbed wire shall have the twisting consistently in either the left or right direction, with alternating of the tw
38、isting prohibited. 7.4. Splicing of the individual wires by means of a wrap joint or an electric butt weld is permitted. Not more than three splices or joints shall exist in any spool of barbed wire. Such splices or joints shall be made in a workmanlike manner. 7.5. The barbed wire, for the various
39、types, shall be packaged on spools in lengths as follows: 7.5.1. Type A80 rods 1320 ft (402 m) or 1000 ft (305 m) 7.5.2. Types Z and ZA80 rods 1320 ft (402 m) or 80 rods plus additional increments of ten rods 165 ft (50 m) 7.6. Breaking StrengthThe breaking strength of the stranded barbed wire, for
40、all types, shall not be less than 950 lbf (4230 N). This breaking strength reflects that of both strand wires tested together as one unit. 8. PERMISSIBLE VARIATIONS IN DIMENSIONS 8.1. DiameterThe permissible variation from the nominal diameter of the wire, for both line wires and barbs, for all type
41、s, shall be 0.005 in. (0.13 mm). 8.1.1. Due to the mechanics of manufacture when forming the barbs, a certain amount of out-of-roundness can be expected. The size and the condition preclude barbs from being subjected to diameter checks. 8.2. Barb SpacingThe nominal spacing of the barbs shall be as n
42、oted in Table 1. The individual barb spacing shall be measured from the edge of one barb at the strand to the corresponding edge of the adjacent barb. Cumulative spacing is established by counting the total number of barbs in a 25-ft (7.6-m) length of barbed wire. Barbs are subject to relocation dur
43、ing fabrication and handling, potentially leading to rejections with rigid interpretation of the spacing requirement. Therefore, barb spacing shall be considered acceptable under the following conditions: 8.2.1. The sample has 93.5 percent of the individual barb spacings conforming to the specified
44、spacing 3/4in. (19 mm), and 8.2.2. A sample length of 25 ft (7.6 m) of barbed wire containing: 8.2.2.1. A minimum of 86 barbs for 3-in. (76-mm) spacing, 2015 by the American Association of State Highway and Transportation Officials.All rights reserved. Duplication is a violation of applicable law.TS
45、-4d M 280-7 AASHTO 8.2.2.2. A minimum of 69 barbs for 4-in. (102-mm) spacing, or 8.2.2.3. A minimum of 55 barbs for 5-in. (127-mm) spacing. 8.3. Barb LengthThe barb length, measured from the center of the two strand wires, shall be 3/8in. (9.5 mm) minimum. 9. SAMPLING AND TESTING 9.1. SamplingFor th
46、e purpose of tests, select one spool at random from every 50 spools or fraction thereof in a lot, or a total of seven samples, whichever is less. A lot shall consist of all the spools of a single construction (Design Number) of barbed wire offered for delivery at the same time. 9.2. Test Specimens f
47、or Physical TestsCut a 4-ft (1.2-m) length of barbed wire from the end of each spool for the tests prescribed in Sections 6 and 7. Determine the breaking strength value by testing the twisted strand as a composite. Test each strand wire individually for weight of coating. 9.3. Testing for Weight of
48、CoatingCoating weight for Types Z and ZA shall be determined in accordance with ASTM A90/A90M. Coating weight for Type A shall be determined in accordance with ASTM A428/A428M. Perform testing either before or after fabrication for the strand wires and for Type A steel barbs. Perform testing prior t
49、o fabrication for Type Z and ZA barbs, and certify the test results. 9.4. Pretesting of WireInstead of testing wire for breaking strength and weight of coating from the completed barbed wire in accordance with Section 9.2, the manufacturer, at his election, shall establish compliance with the requirements in Sections 6 and 7, by tests made on wire prior to fabrication. If the manufacturer makes this election, the purchaser still has the right to test wire from the completed barbed wire for compliance. It
