Square shaft helical anchors transfer tension and compression loads through a central steel shaft with helical bearing plates, serving applications in guying, seawalls, soil nails, foundation repair, and new construction across utility, commercial, and residential projects. The solid square shaft geometry penetrates restrictive spaces and rocky soils while reducing surface area exposure to corrosive environments.
Available in 1-1/2 inch, 1-3/4 inch, and 2 inch round corner square shafts made from hot rolled steel with hot dip galvanized coatings per American Society for Testing and Materials (ASTM) A123 or A153 standards. Helix plates range from 6 to 14 inches in diameter, typically spaced at three times the diameter of the preceding plate, with sharpened edges or special cuts to improve penetration in dense soils.
Ultimate tension capacities range from 70,000 to 200,000 pounds, with allowable loads approximately half of ultimate values. Axial capacity correlates with installation torque using torque factors of 9 to 11 for 1-1/2 inch shafts and 10 to 12 for 2 inch shafts, enabling verification of load-bearing potential during placement. Torsional strengths reach up to 23,000 foot-pounds for larger shafts.
Installation uses hydraulically powered torque motors on equipment like backhoes or excavators, with extensions coupled via forged sockets and bolts. Anchors can be loaded immediately after placement with minimal vibration and all-weather capability. Products comply with International Code Council Evaluation Service (ICC-ES) approval and International Organization for Standardization (ISO) 9001 certification.
Premier Square Shaft Helical Anchor Manufacturer
Here at RaxPower, we have a reputation for close collaboration between our customers and our design engineers to configure the right material for your project. As China’s leading manufacturer of pole line hardware, we specialize in helical anchors for foundation stabilization, offering robust solutions like our Square Shaft Helical Anchor. This product features a patented design with ICC-ES approval, ensuring enhanced performance with tension capacities up to 70,000 lbs, ideal for guy anchors, tiebacks, and soil nails. It provides easy installation, little to no vibration, and immediate load transfer.
Our commitment to “quality is life, reputation is base” drives us to use advanced hot forging technology for greater strength and accurate sizing in every anchor. We implement strict quality control, including multi-stage testing, load tests, and hot-dip galvanizing per ISO 1461 with a mean coating thickness over 85 microns. Established in 2003 and based in Hebei Province, we leverage 21 years of experience, 17,000 sqm production workshops, and a team of over 170 employees to deliver reliable, durable products. Customer feedback underscores our reliability: “The crew was very professional and did a great job.” Choose RaxPower as your preferred supplier for readily available anchoring solutions.
| Shaft Size (in) | Installation Torque Factor (k) | Ultimate Compression Strength (lb) | Ultimate Tension Strength (lb) | Useable Torsional Strength (ft-lb) | Available Helix Diameters (in) |
|---|---|---|---|---|---|
| 1-1/2 | 9 – 11 | 70,000 | 70,000 | 7,500 | 8, 10, 12, 14 |
| 1-3/4 | 9 – 11 | 100,000 | 100,000 | 10,000 | 8, 10, 12, 14 |
| 2 | 10 – 12 | 200,000 | 200,000 | 23,000 | 6, 8, 10, 12, 14 |
Frequently Asked Questions（FAQS）
RaxPower square shaft helical anchors offer ease of installation with little to no vibration, immediate load transfer, all-weather capability, minimal jobsite disturbance, and no curing time required. They are cost-effective and can be installed in limited access areas and load tested immediately. Common applications include tension uses such as seawalls, tiebacks, soil nails, guying, foundation repair, new construction, shoring, and tie downs, as well as resisting axial compressive forces in metal buildings, telecommunication towers, and canopies.
RaxPower offers 1-1/2″, 1-3/4″, and 2″ round corner square shafts with lead sections and extensions in various lengths. Helix diameters range from 6″ to 14″ in single, double, triple, or quad configurations. Ultimate tension strengths are 70,000 lb for 1-1/2″ shafts, 100,000 lb for 1-3/4″ shafts, and 200,000 lb for 2″ shafts. Actual installed capacities depend on soil conditions and are verified through torque correlation during installation.
Anchors are installed using a hydraulically powered torque motor mounted on equipment like backhoes, excavators, or skid-steer loaders. The anchor is screwed into the soil with helix plates spaced three times the diameter of the preceding plate until desired torque is achieved. Installation torque directly correlates to axial capacity, with torque factors typically ranging from 9 to 12 ft-lb per kip of load. RaxPower specifies torque ratings (e.g., 7,500 ft-lb for 1-1/2″ shafts, 10,000 ft-lb for 1-3/4″ shafts) to verify design load requirements are met in homogeneous soils.
RaxPower anchors are hot-dip galvanized per ASTM A123, A153, and ISO 1461 standards for corrosion resistance and long service life. They are manufactured using hot forging for greater strength and accurate sizing, with rigorous load testing and multi-stage quality control ensuring 100% reliability. The design withstands constant vibration and harsh conditions, complying with international standards such as IEC and ASTM, and passing SGS tests and evaluations by authoritative research institutes for demanding electric utility and railway electrification applications.
RaxPower maintains extensive inventory of standard items typically available from stock for quick shipment. For specialized configurations, our automated production lines and 17,000 square meters of workshop space enable efficient fabrication. With over 21 years of exporting experience and a dedicated team, we ensure on-time delivery for bulk orders, keeping large-scale EPC projects on schedule.
RaxPower utilizes advanced manufacturing processes like hot forging and automatic machines to produce helical anchors at lower cost while maintaining perfect quality consistency. Strict raw material selection and multi-stage testing, including gauge and load tests, ensure every component meets precise specifications. This approach provides significant cost savings and protects your brand with reliably uniform products that outperform in-house production. 
What are the benefits and common applications of square shaft helical anchors?
What sizes, configurations, and load capacities are available?
How are these anchors installed and how does torque relate to capacity?
What corrosion protection and quality standards ensure reliability for utility and railway applications?
Can RaxPower handle bulk orders for large-scale EPC projects with guaranteed on-time delivery?
What cost savings and quality consistency can OEM clients expect?
Get A Quick Quotation Today
