The governor ropes, where used, shall be iron, steel, monel metal, or phosphor bronze not less than 6 mm (0.25 in.) in diameter. Tiller rope construction shall not be used.
If equipped with a safety that is operated by the breakage of the suspension means, belts may be used for governor rope. Other means may also be used for governor rope if approved by the AHJ.
Wash. Admin. Code § 296-96-02710