Forged Thimble Eey Anchor Rod | Twin Eye Triple Eye Anchor Rod | IEEE C135.90 & CSA C83

Minimum Tensile Strength for Thimble Anchor Rods

 

To ensure maximum reliability in overhead line construction, Yokelink assembled strand-eye anchor rods are strictly manufactured and tested to meet the tensile load requirements specified in IEEE Std C135.90-2014.

 

Nominal Rod Size	Minimum Tensile Load (lb)	Compliance Standard
5/8"	16,000 lbs	IEEE C135.90-2014
3/4"	23,000 lbs	IEEE C135.90-2014
1"	36,000 lbs	IEEE C135.90-2014

Q1: What is the purpose of the "Thimble Eye" on an anchor rod?

A: The Thimble Eye is a specially contoured, drop-forged loop at the top of the anchor rod. Its curved groove matches the radius of the guy strand (steel wire). This design supports the wire smoothly, preventing it from kinking, flattening, or suffering concentrated bending stress when high tension is applied, eliminating the need for a separate wire thimble.

Q3: Does the IEEE C135.2 standard require the eye to be forged?

A: Yes. High-quality utility anchor rods per IEEE C135.2 are manufactured with an integral drop-forged eye. Welded eyes are generally not permitted for heavy-duty overhead line guying because the weld seam creates a potential weak point that could fail under extreme tensile loads caused by strong winds or ice accumulation.

Q4: What is the relationship between IEEE C135.2 and IEEE C135.90 for anchor rods?

A: IEEE C135.90 is the modern, consolidated standard for wood pole line hardware published in 2014. To streamline industry specifications, the IEEE combined several individual, older standards into this single comprehensive document. IEEE Std C135.2 (which specifically covered Threaded Zinc-Coated Ferrous Strand-Eye Anchor Rods and Nuts) is one of the foundational standards that was directly absorbed and superseded by IEEE C135.90. Therefore, the dimensional and tensile strength requirements for anchor rods in C135.90 are the direct continuation of C135.2.