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ASTM A640-97(2014)
- Standard Specification for Zinc-Coated Steel Strand for Messenger Support of Figure 8 Cable
- standard by ASTM International, 08/01/2014
- Publisher: ASTM
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1.1 This specification covers two sizes of extra-high-strength grade of concentric-lay steel wire strand, composed of seven, zinc-coated steel wires, specifically intended for use as the supporting messenger in Figure 8-type communication and electrical cables.