Key Technical Features of Extension Anchor Rod:
Application: Extends standard anchor rods for deep-soil anchoring.
Thread Design: Rolled threads (UNC) ensure maximum load-bearing capacity.
Connection: Assembled using high-strength HDG threaded couplings.
Material: Heavy-duty carbon steel conforming to utility standards.
Finish: Hot Dip Galvanized for extended buried service life.
Production Process of Extension Anchor Rod
Extension anchor rods are mainly made of high‑strength carbon steel round bar.
Material cutting: Round steel is straightened and cut to fixed length.
Hot forging / upsetting: One end is forged to form an enlarged head or connecting structure.
Thread rolling: Precision threads are formed on both ends for extension connection.
Straightening & deburring: Ensure straightness and remove sharp edges.
Heat treatment: Improve tensile strength and mechanical properties.
Hot-dip galvanizing: Surface treated per ASTM A153 for corrosion resistance.
Inspection: Dimensional check, tensile test, coating thickness test and visual inspection.
Yokelink Quality Control and Testing Equipments
We don't just reference standards; we also verify them in practice: each batch of products undergoes destructive tensile testing in our internal laboratory to ensure load performance exceeds the minimum requirements of IEEE C135.2 or CSA C83 specification; we use optical comparators to ensure the geometric accuracy of chamfered tips and rolled threads, enabling convenient on-site installation; at the same time, we conduct comprehensive testing on Rockwell hardness, coating thickness, and other parameters, and each shipment is accompanied by the original manufacturer's material specifications (MTRs) and quality inspection reports, with all data traceable back to the raw material furnace number.
The Application of Extension Anchor Rod
Extension anchor rods are mainly used in overhead transmission and distribution lines for deep-soil anchoring and guying systems. They provide extra length to reach stable soil layers, improving anchoring stability and pull-out resistance. Connected by threaded ends, they allow flexible assembly and installation. Made of high-strength carbon steel and hot-dip galvanized per ASTM A153, they feature high tensile strength and long-term corrosion resistance. Compliant with IEEE C135.1 and ANSI standards, they ensure safe and reliable performance in various soil and outdoor conditions.
Yokelink Product Quality Inspection Report
We provide comprehensive inspection services for machine bolts, including SGS test bolts and formal Production Part Inspect Report (PPIR). The SGS tests verify the bolts’ compliance with international standards like ASTM A307 and IEEE C135.80, covering mechanical properties and corrosion resistance. The PPIR details all inspection items, ensuring each machine bolt meets dimensional, performance and quality requirements, providing reliable quality assurance for overhead line and industrial applications.
Technical Specifications of Extension Anchor Rod
| Part No. |
Rod Size |
Rod Length |
Thread |
Weight |
| Inch |
Inch |
Inch |
Kg / Pcs |
| E0758-42 |
5/8 |
42 |
5/8 |
1.87 |
| E0758-84 |
5/8 |
84 |
5/8 |
3.50 |
| E0734-42 |
3/4 |
42 |
1 |
2.50 |
| E0734-84 |
3/4 |
84 |
1 |
4.50 |
| E0710-42 |
1 |
42 |
1 |
4.60 |
| E0710-84 |
1 |
84 |
1 |
7.28 |
Cross Reference (Industry Equivalents):
| Rod Size |
Part No. |
HUBBELL |
MACLEAN |
| Inch |
| 5/8 |
E0758-42 |
|
D6231/2C |
| 5/8 |
E0758-84 |
|
D62C |
| 3/4 |
E0734-42 |
|
D7531/2C |
| 3/4 |
E0734-84 |
|
D75C |
| 1 |
E0710-42 |
|
D10031/2C |
| 1 |
E0710-84 |
|
D100C |
Frequently Asked Questions (FAQ)
Q1: How do you connect an extension anchor rod to a standard guy rod?
A: Extension anchor rods are connected to standard threaded anchor rods using a specialized, heavy-duty threaded coupling. The coupling is internally threaded to match the UNC threads of both rods. You simply screw the coupling onto the buried rod, and then thread the extension rod into the top of the coupling until both rod ends meet in the middle for maximum strength.
Q2: Does adding an extension rod and coupling reduce the overall tensile strength of the guying assembly?
A: No, provided you use the correct utility-grade components. Yokelink extension rods feature rolled threads, which retain the full strength of the steel. Furthermore, the threaded couplings are engineered with a thicker wall and higher grade steel to ensure the joint itself exceeds the minimum tensile strength (e.g., 16,000 lbs or 23,000 lbs) of the rods being connected.
Q3: When is an extension anchor rod absolutely necessary?
A: An extension rod is necessary when the specific soil class required to achieve the anchor's rated holding capacity is located deep underground. For example, if the top 6 feet of soil is swampy or loose fill (Class 7 or 8), you must drive the earth anchor (like a cross plate or expanding anchor) deeper into firm, undisturbed soil. The extension rod bridges the gap from the deep anchor up to the ground surface where the guy wire attaches.
Q4: Can I attach an extension rod directly to the earth anchor?
A: Yes. In deep-soil applications, the threaded end of an extension rod (or a standard rod) is first screwed into the nut retainer of the earth anchor, such as a Bust Expanding or Cross Plate anchor. You then use a heavy-duty coupling to attach additional extension rods as needed to reach the surface. Finally, a standard Thimble Eye Anchor Rod (or an eye nut) is attached to the very top to connect the guy wire above ground.
Q5: Will the heavy Hot Dip Galvanized (HDG) coating make the threads difficult to assemble in the field?
A: Not with Yokelink hardware. While heavy galvanizing per ASTM A153 adds a thick, protective layer of zinc for decades of rust prevention, our extension rods feature precision-rolled threads that are carefully cleared of excess zinc during the manufacturing process. Furthermore, our threaded couplings are tapped with specific utility tolerances to ensure smooth, bind-free assembly by linemen in the field, even in harsh weather conditions.
Value-Added Supply Chain Services
1. Blanket Order & Free Warehousing
Yokelink offers Blanket Order programs: Place an annual order to lock prices, we manufacture your total volume and hold stock in our facility free of charge. Split Shipments: Schedule partial shipments (e.g., monthly or quarterly) based on your project progress. You get the benefits of just-in-time delivery without the risk of shortages.
2. DDP Shipping (USA Duties Included)Landed Cost Certainty:
We handle the complex logistics. Our DDP (Delivered Duty Paid) service covers sea freight, US Customs clearance, and Section 301 tariffs. The price we quote is the final price delivered to your door / Warehouse.
3. Free Sample Program
We offer Free Samples to qualified commercial buyers for testing and approval.
Reference Information:
Triple eye Anchor Rods: The Ultimate Guide for guy Wire and Structural Stability
Pole Line Hardware Drop Forged Hot Dipped Galvanized Anchor Rod
