The Square Shaft Extension connects to helical pile lead sections to reach required foundation depths in both tension and compression applications. Manufactured from galvanized steel (some versions meeting ASTM A123 standards), it provides corrosion resistance for outdoor installations while maintaining structural integrity during embedding and service loads.
Available in 1.5-inch and 2-inch square shaft sizes with lengths from 3 to 10 feet, the extension weighs approximately 40 to 70+ pounds depending on configuration. The 2-inch models offer tensile strength up to 150,000 pounds and torque ratings reaching 16,000 foot-pounds, while 1.5-inch versions provide 7,000 foot-pounds torque capacity. These ratings require alignment within 5 degrees of load direction and proper installation practices.
Factory-assembled with bolt and nut hardware, the extension simplifies field installation. Torque measurement during embedding correlates to pile capacity, enabling load verification as the system reaches stable soil strata. This approach supports reliable foundation performance for towers, guyed structures, and other applications requiring predictable load transfer at depth.
Square Shaft Extension Wholesaler with 21 Years of Expertise
RaxPower Square Shaft Extension 10mm x 10mm x 400mm for 100A to 400A switches. Shaft extension for external operating handle for fuse switch-disconnectors.
High short circuit performance up to 100 KA. Robust and compact design for effective protection and reliability.
Manufactured by RaxPower, established in 2003 with 21 years of expertise in power hardware production in Hebei Province, China. Our advanced hot forging technology ensures greater strength and accurate sizing for durable shaft extensions. Automatic machines maintain uniform dimensions and consistent quality.
Strict quality control includes multi-stage testing, load tests, and gauge tests per IEC standards, guaranteeing 100% quality and safe operation.
With 17,000 sqm production workshops and over 170 skilled employees, we deliver reliable products on time.
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| Parameter | Value |
|---|---|
| Application | Helical Anchoring |
| Type | Anchor Extensions |
| Shaft Size | 1.5 in, 2 in (square) |
| Length | 3 ft to 10 ft |
| Weight | 40 lb to over 70 lb |
| Tensile Strength | Up to 150,000 lb |
| Torque Rating | 16,000 ft-lbs (2 in shaft), 7,000 ft-lbs (1.5 in shaft) |
| Material | Steel |
| Coating | Galvanized |
| Galvanizing Standard | ASTM A123 |
| Strength Note | Ultimate strength ratings apply to properly installed anchors only. Alignment within 5 degrees of the load direction is critical. |
| Pallet Quantity | 12 |
| Standard Package | 1 |
Frequently Asked Questions（FAQS）
What is the primary use of a square shaft extension?
The RaxPower Square Shaft Extension is used to extend pile length so that the lead section reaches proper depth. It is part of the helical square shaft system, applied in tension, compression, or both types of structure loading, providing a predictable foundation solution for significant load capacities.
What are the key specifications and performance ratings?
The RaxPower Square Shaft Extension features tensile strengths up to 150,000 lb and torque ratings up to 16,000 ft-lbs. It has a 2.00 in x 2.00 in cross-section and is available in lengths of 3 ft, 3.5 ft, 4 ft, 5 ft, 5.5 ft, 7 ft, and 10 ft. Constructed from steel with hot-dip galvanized finish per ASTM A123, units weigh approximately 41 lb to 76 lb depending on model.
Are your products certified for critical infrastructure projects?
Yes, our products are building code approved and manufactured to meet industry standards, with galvanization exceeding mean coating thickness of 85 microns per ISO 1461. They have passed rigorous load and gauge testing per standards like IEC 120 by authoritative research institutes, ensuring compliance and reliability for utilities, railways, and other regulated sectors.
How is helical pile capacity determined during installation?
The capacity of the helical pile is determined by measuring the installation torque during the setup process.
What installation considerations ensure optimal performance?
For optimal performance, ensure proper installation within 5° of alignment with the guy load, as ultimate strength ratings apply only to correctly installed anchors. Misalignment may significantly reduce strength. The bolt and nut are factory-assembled for ready-to-use installation.
How do you manage large volume orders for timely delivery?
We offer standard packaging with 12 units per pallet and leverage automated manufacturing processes for accurate sizing and uniform quality. With 17,000 square meters of production workshops and 5,000 square meters of warehouses, plus strict quality control including 100% review before packing, RaxPower ensures efficient, on-time delivery for bulk supply needs.
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