Tensile strength that competes with steel, without the weight or rust. A typical FRP solid rod with a 16 mm diameter commonly delivers over 100 kN in ultimate tensile capacity—comparable to a grade 8.8 steel bolt—yet the rod weighs less than a quarter of its steel equivalent. For a tension tie-back assembly in a marine retaining wall, the installer can typically carry a bundle of rods under one arm instead of needing a crane.
Creep performance under permanent load. FRP solid rods may be tested to ASTM D7337, which evaluates creep rupture under sustained tension in a corrosive alkaline environment—the kind of condition a ground anchor sees for its entire service life. The rods generally hold their pre-load without progressive elongation, reducing the need for periodic re-tensioning that steel anchors commonly demand as they relax.
Corrosion resistance where steel is vulnerable. In buried anchor applications—soil nails, rock bolts, tunnel tie-backs—stray currents and soil chemistry can corrode steel tendons from the outside in. FRP solid rods are non-conductive; there is typically no galvanic cell to form, no cathodic protection system to design and monitor. The rod's cross-section generally remains intact regardless of soil resistivity or pH. Corrosion resistance is commonly verified under ASTM D543.
Threading and fabrication on site without hot work. FRP solid rods can be threaded with standard carbide tooling, cut to length with an abrasive saw, and assembled into custom tie-rod assemblies without a welding permit. For a construction site retrofitting an existing structure, this commonly means anchor lengths can be fine-tuned at the point of installation rather than being factory-ordered to the millimetre.
Common applications include marine retaining wall tie-back rods, soil nail and ground anchor tendons, structural cross-bracing in corrosive plants, threaded rod assemblies for tank hold-downs, and tunnel lining rock bolts. In each case, the rod is buried, submerged, or permanently inaccessible—making corrosion resistance a structural requirement, not a preference. For related anchoring and tensioning strategies, see FRP Corrosion Prevention Solutions and FRP Structural Support Applications.
Standard diameters range from 6 mm to 50 mm, with custom diameters available on request. Tensile strength typically ranges between 600–1,200 MPa in the fibre direction when tested in accordance with ASTM D7205, with actual values depending on bar diameter and resin matrix selection. Tensile modulus typically ranges between 40–65 GPa, reflecting the high fibre-volume fraction characteristic of unidirectional pultrusion. Length is typically up to 6 m, with longer lengths and custom cut lengths available on request. Resin systems include vinyl ester as standard for maximum corrosion resistance and creep performance, with polyester available as an alternative. Maximum continuous service temperature is typically 100°C for vinyl ester grades, with short-term excursions acceptable. Weight ranges from approximately 0.1–2.5 kg/m depending on diameter, about one-quarter of equivalent steel rod. Surface finish is smooth as standard, with sanded finish available for bonding applications. The high fibre-volume fraction of unidirectional pultruded FRP composites typically provides the longitudinal stiffness and creep resistance required for permanent anchor applications.
Standard Dimensional Parameters
Commonly available diameters and standard stock lengths for pultruded FRP solid rods are listed below for reference. Custom diameters, cut-length orders, and coil-wound options for small-diameter rods are available on request.
| Parameter | Commonly Available Specification |
|---|---|
| Diameter — Small Rod | 6 mm, 8 mm, 10 mm, 12 mm |
| Diameter — Medium Rod | 14 mm, 16 mm, 20 mm, 25 mm |
| Diameter — Large Rod | 30 mm, 32 mm, 35 mm, 40 mm, 50 mm |
| Standard Stock Length | 3 m, 6 m |
| Small-Diameter Coil Option (≤10 mm) | Continuous coil lengths available; consult technical desk |
Additional diameters up to 50 mm and custom lengths beyond 6 m are available for project-specific requirements. For tensile performance data, creep testing results, and anchor design parameters, see the referenced ASTM performance figures in the product description above.
Proven in Field
"The steel tie‑backs on our waterfront bulkhead were corroding to the point of section loss within eight years. We replaced the entire system with FRP solid rods—installed by hand, threaded on site, and re‑tensioned once. After six years of tidal exposure, the rods show no measurable degradation."
— Port Infrastructure Engineer, Marine Terminal Authority
Request Solid Rod Specifications & Tensile Performance Data
WayTong supplies pultruded FRP solid rods in standard diameters from 6 mm to 50 mm with custom lengths and resin formulations. Contact our technical desk for creep performance data, thread capacity calculations, and project‑specific anchor design support.
Request Product InformationFRP solid rods are part of the WayTong FRP Structural Profiles range, which also includes I‑beams, square tubes, round tubes, angles, channels, and flat bars. For complete mechanical and corrosion performance data, see the ASTM Standards Summary.