(a) Towers shall be secured with guys or rigid braces at each corner at intervals not to exceed 30 feet vertically.(b) Towers guys shall be at least 1/2 -inch diameter improved plow-steel wire rope, secured to anchorages with wire-rope clips as specified in Table 5, or the equivalent. The wire-rope fastenings and the anchorages shall withstand four times the maximum intended loadings.Cal. Code Regs. Tit. 8, § 1605.6