In a move set to transform ground support and anchoring techniques, SupAnchor, a global leader in geotechnical reinforcement systems, has announced the launch of its new SupFRP® GFRP Solid Bolt. Designed for demanding civil engineering and mining projects, this high-performance bolt leverages Glassfiber Reinforced Polymer (GFRP) technology to deliver unmatched corrosion resistance, lightweight handling, and reliable load-bearing capacity. As infrastructure projects expand into challenging environments—from saline-alkali soils to humid tunnels—the need for durable, maintenance-free anchoring solutions has never been greater. The GFRP Solid Bolt arrives as a direct answer to these requirements, offering a solid, non-metallic alternative to conventional steel rock bolts.
Unlike traditional hollow bar anchors that depend on central grouting channels, the SupAnchor solid bolt features a robust, continuous cross-section. This design eliminates the point weaknesses often found in tubular or injection bolts, providing uniform stress distribution and higher tensile integrity. Its waved thread structure encases the entire length, enhancing mechanical interlock with grouting compounds and surrounding rock. The result is a geotechnical reinforcement system that excels in permanent and temporary applications alike—whether stabilizing highway cuts, supporting underground chambers, or reinforcing mine shafts.
“Our engineering team focused on creating a bolt that bridges the gap between high mechanical performance and extreme durability,” said a SupAnchor spokesperson. “The GFRP Solid Bolt’s solid structure eliminates the corrosion-prone hollow core, delivering a stronger, longer-lasting anchor that slashes lifecycle costs and enhances safety in critical infrastructure.”
Below are the standard models of the SupFRP® GFRP Solid Bolt. All variants feature a waved thread profile along the full length to maximize bond strength, and they can be supplied in left- or right-hand threads and lengths from 2 to 11 meters.
| Model | Outside Diameter (mm)¹ | Nominal Cross-Sectional Area (mm²)² | Guaranteed Tensile Load (kN) | Weight (kg/m) |
|---|---|---|---|---|
| S20/200 | 20 | 200 | 200 | 0.52 |
| S22/240 | 22 | 240 | 240 | 0.62 |
| S25/320 | 25 | 320 | 320 | 0.83 |
| S28/400 | 28 | 400 | 400 | 1.04 |
| S32/500 | 32 | 500 | 500 | 1.30 |
¹Outside diameter includes the waved thread structure for enhanced grout-to-bolt bonding. ²Nominal cross-sectional area refers to the stress-bearing core, ensuring uniform mechanical properties.
All models share a tensile E-modulus of 45 GPa and an ultimate strain of 2.0%. The waved thread not only increases pull-out resistance but also simplifies coupling with standard anchor plates, nuts, and domed washers—enabling full compatibility with existing self drilling anchor system components. This interchangeability allows contractors to seamlessly integrate the solid bolts into their current ground anchor bolt factory setups without retooling.
The GFRP Solid Bolt is already proving its worth in a variety of geo-engineering contexts:
“As a soil nail system manufacturer, we’ve seen growing demand for non-metallic reinforcement in aggressive ground conditions,” notes SupAnchor’s product manager. “Many projects can’t afford the risk or delay of corrosion surveys and bolt replacement. Our solid GFRP bolt eliminates that lifecycle cost entirely.”
The introduction of the GFRP solid bolt aligns with global infrastructure trends toward sustainability and resilience. Governments and contractors are seeking materials that cut carbon footprints—GFRP’s low weight reduces transport emissions, and its long service life avoids premature replacement cycles. Additionally, the bolt’s cutability minimizes waste; on-site adjustments produce no metal scrap that could damage nearby mining equipment or TBM cutters.
From an economic standpoint, while the initial material cost may be higher than uncoated steel, the total cost of ownership (TCO) is often lower when factoring in lower transport, faster installation, zero anti-corrosion treatment, and decades of maintenance-free performance. For tunnel projects such as metro systems or deep-seated mines, this translates to safer ventilation shafts and escapeways that demand minimal upkeep over their design life. The self drilling anchor bolt market, traditionally dominated by steel, is now seeing a compelling alternative that addresses long-standing durability challenges.
“The hollow bar anchor has served the industry well, but its internal void can become a pathway for moisture,” explains a senior geotechnical engineer at an international consultancy. “A solid GFRP profile simply removes that failure mode. Combined with excellent pull-out strength, this is a major evolution in drill-and-grout bolt technology.”
With decades of experience as a ground anchor bolt factory, SupAnchor maintains a research-driven culture that has yielded many firsts in the anchoring industry. The company holds ISO 9001, ISO 14001, and OHSAS 18001 certifications, and all products undergo rigorous testing according to EN and ASTM standards. Its global footprint spans over 50 countries, where its self drilling anchor systems and soil nails have successfully supported iconic infrastructure: from high-speed rail links in Europe to hydroelectric tunnels in South America.
The launch of the SupFRP® GFRP Solid Bolt reinforces the company’s brand ethos: Professional engineering combined with Innovative materials and Collaborative project support. In-house laboratories and field testing with key clients ensure that each product meets real-world demands before it reaches the market.
As geotechnical challenges grow harsher, SupAnchor continues to deliver solutions that keep people, machines, and structures safe. The GFRP Solid Bolt is now available for order, with customized lengths and thread configurations to suit any project. For more information, visit supanchor.com or contact our regional support teams.
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