#3 (3/8-inch) Premium Fiberglass Rebar for Concrete Reinforcement

Product Description

Our professional-grade #3 (3/8-inch) fiberglass rebar provides corrosion-resistant concrete reinforcement without the rust problems of traditional steel. Made from high-strength glass fiber reinforced polymer (GFRP), this 3/8-inch diameter rebar is specifically engineered for concrete flatwork and light structural applications where corrosion resistance is crucial. Each 20-foot bar features our sand-coated surface for concrete bond, ensuring long-term structural integrity even in harsh environments. At about one-quarter the weight of steel rebar for equal diameter, our #3 GFRP reinforcement can reduce installation time and labor costs while offering excellent tensile strength for residential slabs, pool decks, coastal construction, and other moisture-exposed applications.

Our #3 (3/8-inch) fiberglass rebar is manufactured by pultrusion for consistent quality. Related FRP solutions: pultruded FRP profiles, FRP rebar, pultrusion machines, and pultrusion dies.

Technical Specifications

Applications & Use Cases

Our corrosion-resistant #3 (3/8-inch) fiberglass rebar is specifically designed for:

• Residential Concrete Flatwork: Driveways, sidewalks, patios, and garage floors requiring crack control reinforcement
• Swimming Pool Construction: Decks, coping, and pool shells where chlorine rapidly corrodes steel alternatives
• Coastal Building Projects: Seawalls, docks, and oceanfront structures exposed to constant salt spray and moisture
• Cold Climate Infrastructure: Bridge decks, highway barriers, and parking structures subjected to de-icing salts
• Healthcare Facility Construction: MRI rooms, medical imaging areas, and laboratories requiring zero magnetic interference
• Agricultural Building Solutions: Livestock facilities, feed bunks, and manure storage areas with highly corrosive conditions
• Basement Foundation Reinforcement: Walls and slabs requiring long-term moisture resistance in below-grade applications
• Decorative Concrete Elements: Countertops, furniture, and architectural features where preventing rust stains is essential

Product Advantages & Features

Comparative Value Analysis

Key Performance Benefits

1. High Corrosion Resistance: Unlike epoxy-coated or galvanized steel that eventually corrodes, our 3/8-inch fiberglass rebar remains highly resistant to rust, chlorides, and chemical attack in many environments.
2. Significant Weight Reduction: A standard 20-foot length of our #3 fiberglass rebar weighs just 5.2 pounds compared to 20.8 pounds for steel, allowing single-person handling and reducing worker fatigue during large installations.
3. Enhanced Tensile Performance: With tensile strength exceeding 100,000 psi, our #3 GFRP rebar delivers high strength-to-weight ratio compared with steel reinforcement for equal diameter, enabling optimal structural efficiency.
4. Thermal Compatibility with Concrete: Our fiberglass rebar expands and contracts at nearly the same rate as concrete (5.5 × 10⁻⁶ in/in/°F vs. 5.5 × 10⁻⁶ in/in/°F for concrete), dramatically reducing internal stress cracking during freeze-thaw cycles.
5. High Chemical Resistance: Unaffected by road salts, chlorine, acids, fertilizers, and other aggressive chemicals that rapidly deteriorate steel, our fiberglass reinforcement ensures decades of low-maintenance performance in harsh environments.
6. Electromagnetic Neutrality: 100% non-conductive and non-magnetic properties make our #3 fiberglass rebar a suitable choice for concrete near sensitive electronic equipment, hospital MRI installations, or airport radar facilities.

Frequently Asked Questions

How does #3 (3/8-inch) fiberglass rebar compare to steel rebar for concrete slab reinforcement?

Our 3/8-inch fiberglass rebar offers high corrosion resistance and similar tensile strength to steel while weighing much less than steel for equal diameter. It’s ideal for residential slabs, especially in areas with high moisture or salt exposure where steel would eventually rust and cause concrete spalling. For standard 4-inch concrete slabs, our #3 fiberglass rebar provides excellent crack control when placed in a 16-inch grid pattern.

Can I use #3 fiberglass rebar for foundation walls and footings?

While our #3 fiberglass rebar works excellently for temperature and shrinkage control in foundation walls, it has lower shear strength than steel. For heavily loaded structural foundations, we recommend consulting a structural engineer familiar with GFRP design principles. Many successful foundation projects use our fiberglass rebar, but proper engineering is essential.

How do I properly cut and install 3/8-inch fiberglass rebar?

Cut our #3 fiberglass rebar using a diamond blade saw or abrasive cutting wheel. Always wear a dust mask and gloves, as cutting produces fine particles. For installation, use plastic zip ties at intersections instead of wire ties. Maintain standard concrete cover requirements (minimum 3/4 inch). Remember that unlike steel, fiberglass rebar cannot be field-bent – all bends must be factory-fabricated.

Is GFRP fiberglass rebar approved by building codes for concrete reinforcement?

Yes, our #3 (3/8-inch) fiberglass rebar meets ASTM D7957 standards and is designed according to ACI 440.1R-15 guidelines. Most current building codes accept GFRP reinforcement for specific applications. We provide complete documentation for permit submittal, but we recommend checking with your local building department, as code adoption varies by jurisdiction.

What spacing should I use for #3 fiberglass rebar in my concrete project?

For standard 4-inch residential slabs using our 3/8-inch fiberglass rebar, we recommend 16-inch spacing in both directions. For pool decks and other high-performance applications, consider 12-inch spacing. For commercial applications or thicker slabs, consult a structural engineer for project-specific requirements based on loading conditions and soil characteristics.

How long will 3/8-inch fiberglass rebar last in concrete compared to steel?

While steel rebar typically begins corroding within 10-15 years in exposed conditions (sooner with salt exposure), our #3 fiberglass rebar is designed for long service life in corrosive environments. This reduces the risk of concrete cracking and spalling associated with corroding steel reinforcement, significantly extending the service life of your concrete installation.