The weight of GFRP rebar depends primarily on bar diameter, glass fiber volume fraction, and resin density. The table below lists nominal linear weights for standard bar sizes, calculated from typical cross‑sectional areas and a density range commonly reported for E‑glass/vinyl ester GFRP reinforcement. Tensile strength varies according to bar diameter and manufacturing process; a single fixed value is not applicable. GFRP rebar is corrosion resistant in chloride‑prone environments. For mechanical properties including guaranteed tensile strength and modulus, refer to GFRP Rebar Mechanical Properties.
The approximate weights below are intended for preliminary material estimation only. Do not use these values for final procurement without manufacturer confirmation. Actual weight may differ depending on fiber architecture, resin formulation, and production tolerances.
| Bar Designation | Nominal Diameter (mm) | Approx. Cross‑Sectional Area (mm²) | Approx. Weight (kg/m) | Data Reference |
|---|---|---|---|---|
| #3 | 9.5 | 71 | 0.13 – 0.15 | ASTM D7205 / manufacturer data |
| #4 | 12.7 | 127 | 0.22 – 0.26 | ASTM D7205 / manufacturer data |
| #5 | 15.9 | 199 | 0.36 – 0.42 | ASTM D7205 / manufacturer data |
| #6 | 19.1 | 286 | 0.50 – 0.59 | ASTM D7205 / manufacturer data |
| #7 | 22.2 | 387 | 0.68 – 0.80 | ASTM D7205 / manufacturer data |
| #8 | 25.4 | 507 | 0.89 – 1.05 | ASTM D7205 / manufacturer data |
Disclaimer: Weight ranges are approximate and based on a glass fiber volume fraction of approximately 60–65% and matrix density around 1.9 g/cm³. Actual weights will vary by manufacturer. For design purposes, always use the published values from the specific rebar supplier. Tensile strength and modulus values are not provided on this page because they are diameter‑dependent; see GFRP Rebar Mechanical Properties for guaranteed values per ASTM D7205.
For concrete design guidance using GFRP reinforcement, see the GFRP Rebar Design Guide.