The growing demand for durable anchoring solutions in corrosive environments has driven innovation in geotechnical reinforcement systems. SupAnchor, a leading soil nail system manufacturer and ground anchor bolt factory, has introduced the SupFRP® GFRP Solid Bolt, a high-strength solid anchor designed to replace traditional steel bolts in challenging conditions. With guaranteed tensile loads up to 500 kN and a density only one-quarter that of steel, this product offers engineers a reliable, long-lasting alternative for slope stabilization, underground support, and mining applications.
Made from high-quality Glassfiber Reinforced Polymer (GFRP), the bolt eliminates the hollow structure of conventional injection bolts while retaining GFRP's corrosion resistance, lightweight, and non-conductivity. Unlike hollow bar anchors or drill-and-grout bolts that require grouting for load transfer, the solid bolt features a waved thread structure that enhances bonding with grouting materials or rock mass, providing immediate and long-term load-bearing capacity.
The SupAnchor GFRP Solid Bolt is available in five models covering diameters from 20 mm to 32 mm, with nominal cross-sectional areas from 200 mm² to 500 mm². The table below summarizes key technical data for each model.
| Model | Outside Diameter (mm) | Nominal Cross Sectional Area (mm²) | Guaranteed Tensile Load (kN) | Tensile E-Modulus (GPa) | Ultimate Strain (%) | Weight (kg/m) | Thread | Lengths (m) |
|---|---|---|---|---|---|---|---|---|
| S20/200 | 20 | 200 | 200 | 45 | 2.0% | 0.52 | Left or Right | 2,3,4,5,6,7,8,9,10,11 |
| S22/240 | 22 | 240 | 240 | 45 | 2.0% | 0.62 | Left or Right | 2,3,4,5,6,7,8,9,10,11 |
| S25/320 | 25 | 320 | 320 | 45 | 2.0% | 0.83 | Left or Right | 2,3,4,5,6,7,8,9,10,11 |
| S28/400 | 28 | 400 | 400 | 45 | 2.0% | 1.04 | Left or Right | 2,3,4,5,6,7,8,9,10,11 |
| S32/500 | 32 | 500 | 500 | 45 | 2.0% | 1.30 | Left or Right | 2,3,4,5,6,7,8,9,10,11 |
These specifications highlight the bolt's exceptional performance. The guaranteed tensile load ranges from 200 to 500 kN, making it suitable for medium to high load applications. With a tensile E-modulus of 45 GPa and ultimate strain of 2.0%, the GFRP material provides a controlled deformation response under stress, reducing the risk of sudden brittle failure. The waved thread structure on the outside diameter enhances mechanical interlock with grout or rock, ensuring efficient load transfer along the entire embedment length. Moreover, the bolt's lightweight nature (0.52–1.30 kg/m) significantly reduces handling and installation effort, while its non-conductive and non-magnetic properties make it ideal for sites near power lines or sensitive electronic equipment.
The SupAnchor GFRP Solid Bolt is engineered for geotechnical conditions where steel anchors corrode or where electromagnetic interference is a concern. Typical applications include slope stabilization in coastal areas with high salinity, underground tunnel support in water-bearing strata, mine roadway reinforcement in aggressive chemical environments, and temporary or permanent anchoring in remote or hard-to-access locations. In these scenarios, the bolt's corrosion resistance ensures a service life far exceeding that of steel, even without additional protective coatings or cathodic protection systems.
As global infrastructure investment grows, particularly in coastal protection, mining, and underground construction, the need for durable geotechnical reinforcement systems has never been greater. Traditional steel hollow bar anchors and drill-and-grout bolts often suffer from corrosion, leading to premature failure and costly repairs. The GFRP solid bolt addresses these pain points by offering a maintenance-free solution that reduces lifecycle costs and enhances structural safety. Its compatibility with standard drilling and grouting equipment allows contractors to adopt the technology without major changes to existing workflows. For mining operators, the non-sparking and non-magnetic characteristics improve safety in underground environments, while the lightweight material reduces worker fatigue and transportation costs.
SupAnchor's commitment to research and development is evident in the product's design. The company holds ISO 9001, ISO 14001, and OHSAS 18001 certifications, reflecting its dedication to quality, environmental management, and occupational health. With projects spanning over 50 countries, SupAnchor has built a reputation as a reliable self drilling anchor system manufacturer and ground anchor bolt factory. The GFRP Solid Bolt is the latest addition to a comprehensive portfolio that includes self drilling anchor bolts, hollow bar anchors, and other geotechnical reinforcement systems. By combining innovative materials with practical engineering, SupAnchor continues to deliver solutions that meet the evolving needs of the global construction industry.
Engineers and project owners seeking a durable, lightweight, and corrosion-resistant anchoring solution should consider the SupAnchor GFRP Solid Bolt. Its proven performance in harsh environments, coupled with SupAnchor's technical support and global supply chain, makes it a smart choice for long-term geotechnical stability.
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