ASTM A640-97
- Standard Specification for Zinc-Coated Steel Strand for Messenger Support of Figure 8 Cable
- standard by ASTM International, 04/10/1997
- 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.
1.2 The values stated in inch-pound units are to be regarded as the standard.
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