1.1 This specification covers 3/4 and 1-in. (19 and 25-mm) zinc-coated steel wire rope and fittings for use in the construction of highway guardrail. 1.2 The values stated in inch-poun This specification covers zinc-coated steel wire rope and fittings for use in the construction of highway guardrail. The base metal shall be steel made by any process and shall be of such quality that the finished wire rope and the individual zinc-coat