The Square Shaft Lead is a helical anchor component that transfers surface loads into bearing soil layers through a square steel shaft with multiple helical plates. The plates screw into the soil with minimal disturbance, providing predictable foundation solutions for applications requiring tension, compression, or combined structural loading. It delivers significant load capacities across various ground conditions, including weak soils and rocky layers.
The lead section typically features multiple helices with diameters of 8, 10, 12, or 14 inches, and connects with square shaft extensions using through bolts to reach proper installation depths. Square shaft sizes range from 1-1/2 to 2 inches, with torque ratings from 7,000 to 15,000 foot-pounds and tensile strengths up to 150,000 pounds depending on the model. Components are hot-dipped galvanized per American Society for Testing and Materials (ASTM) A153 or A123 standards for moisture and corrosion resistance. Some variants include wear-resistant, offset carbide tips for penetrating rocky layers.
Installation uses torque motors to screw the helical plates into the soil, allowing immediate load transfer with limited site disruption across various weather conditions. Anchor capacity is determined by measuring installation torque, with proper alignment within 5 to 10 degrees of the load direction critical to maintain tension load resistance and ensure reliable performance based on soil conditions.
Square Shaft Lead Wholesaler with Over 21 Years of Expertise
RaxPower is a leading manufacturer of helical square shaft anchors in China, with over 21 years of expertise in the deep foundation industry. Our Square Shaft Lead is engineered using advanced hot forging technology, ensuring greater strength and precise dimensions for reliable performance. It features helical plates that screw into the soil with minimal disturbance and is hot-dip galvanized per ISO 1461 standards for superior corrosion resistance.
The capacity of this anchor is directly correlated to installation torque, making it easy to install, space-efficient, and immediately loadable upon installation—unique advantages in foundation work. It is ideal for tension, compression, or combined loads in applications including:
- guy anchors
- tiebacks
- shoring
- power transmission
Backed by strict quality control, including raw material selection and multi-stage testing, each unit delivers predictable, high-capacity solutions.
With a commitment to engineering excellence and performance reliability, proven through industry use in utilities, telecom, and renewables, our Square Shaft Lead stands out for its durability and ease of use. Our team is ready to help!
| Parameter | Value |
|---|---|
| General | |
| Application | Helical anchoring for tension and compression loads |
| Type | Lead sections |
| Shaft Type | Square bar |
| Shaft Size | 2 inches |
| Number of Helices | 4 |
| Torque Rating | 15,000 foot-pounds |
| Tensile Strength | 150,000 pounds |
| Coating | Hot-dipped galvanized |
| Coating Standard | ASTM A153 |
| Material | Steel |
| Dimensions | |
| Helix Diameters | 8, 10, 12, 14 inches |
| Length | 10 feet |
| Weight | 245 pounds |
Frequently Asked Questions（FAQS）
What are the primary applications of the square shaft lead?
The square shaft lead transfers surface loads into bearing layers of soil for tension, compression, or combined structure loading. Common applications include guy anchors, tiebacks, shoring, tilt walls, soil nails, slab repair, bowed walls, and tie downs.
What are the benefits of using helical anchors over other foundation methods?
Helical anchors offer minimal soil disturbance as the plates screw into the soil rather than augering, provide immediate load transfer upon installation, require little to no vibration, and allow for capacity verification through installation torque measurement.
How is the load capacity of the anchor determined during installation?
Capacity is determined by measuring installation torque, which correlates directly to holding capacity, allowing for real-time assessment and verification during installation.
What specifications are available for shaft size and helix configurations?
RaxPower's square shaft leads are available in shaft sizes of 1.5″, 1.75″, 2″, and 2.25″. Helix diameters range from 8″ to 14″ in various combinations, with lead sections featuring 2, 3, or 4 helices. Standard lengths range from 5 feet to 10 feet.
What is the coating on the square shaft lead and what standards does it meet?
The square shaft lead is hot-dip galvanized for corrosion resistance, meeting ASTM A153 or ASTM A123 standards, with coating thickness exceeding 85 microns per ISO 1461 to ensure durability in various environmental conditions.
How is the square shaft lead assembled with extensions?
Square shaft lead sections are assembled to square shaft extensions using a through bolt, enabling secure connections and depth adjustment during installation.
What is the tensile strength and torque rating of the square shaft lead?
Tensile strength ratings reach up to 70,000 lb, 100,000 lb, or 150,000 lb depending on shaft size, with torque ratings ranging from 5,500 ft-lbs to 21,000 ft-lbs to accommodate different load requirements and soil conditions.
How do you maintain consistent quality in every square shaft lead produced?
RaxPower employs strict quality control measures, including multi-stage testing and 100% quality review before packing, ensuring ultimate strength ratings are achieved with proper installation.
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