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Fiberglas™ Dowel Bars


Setting the Bar in Concrete Reinforcement

Concrete pavements degrade due to the corrosion of steel dowel bars causing joint failure. Owens Corning® Fiberglas™ Dowel Bars are a proven, non-corroding, lightweight, electromagnetically neutral solution for load transfer between concrete slabs.


Performance Attributes

  • Benefits

    • Fiberglas™ Dowel Bars are used as “load transfer” devices between joints in concrete slabs providing a mechanical connection between slabs while allowing for horizontal contraction and expansion of the slab itself. This results in lower deflections at the joints and reduced slab stresses. <br> <br> • Joint failure is often the result of corrosion of the steel dowel bar. Fiberglas™ Dowels will not rust or corrode, locking a concrete joint together or causing spalling of the surrounding concrete. <br> <br> • While providing the necessary shear capacity at the joint, the lower stiffness of the GFRP Dowels may reduce fatigue stresses in the concrete surrounding the dowel. Fiberglas™ Dowel Bars are also electromagnetically transparent and frequently used in high-speed toll collection areas near inductance sensors.

  • Applications

    Owens Corning® Fiberglas™ Dowel Bars are designed for use in a wide variety of applications including: jointed rigid pavement, dowel bar retro-fits, high speed tolling areas with electromagnetic sensitivities, automatic & wire-guided vehicle areas, canals and desalination input channels, and magnetometer isolation pads.

Technical Information

Physical and Mechanical Properties

Dowel Bar Diameter Nominal Cross Sectional Area Unit Weight/Length Longitudinal Shear Strength Per ASTM D4475 Short Beam Shear Transverse Shear Strength Per ASTM D7617 Double Shear Transverse Shear Load
mm in in² mm² lbs/ft g/m psi MPa psi MPa lbs kN
16 5/8 0.307 198 0.3 447 7252 50 23206 160 7122 32
19 3/4 0.442 285 0.38 566 7252 50 23206 160 10251 46
25 1 0.785 507 0.65 967 7252 50 23206 160 18237 81
32 1 1/4 1.227 792 1.05 1563 7252 50 23206 160 28488 127
38 1 1/2 1.767 1140 1.65 2456 7252 50 23206 160 41005 182

Values in the above table are Mean Ultimate Values. Transverse shear test is per ASTM D7617. We reserve the right to make improvements in the product and/or process which may result in benefits or changes to some physical-mechanical characteristics.

Material Properties

per ASTM D7205-06

The “Shear Strength”, typically the “Transverse” or “Double Shear” strength of the Fiberglas™ Dowel Bar product is determined using the ASTM D7617 method. “Longitudinal Shear” or “Short Beam Shear” subjects the bar to a three point loading fixture and measures the shear strength along the axis of the bar. This testing is performed per ASTM D4475.
Glass Fiber Content 70% by weight per ASTM D2584
Moisture Absorption 24 hour absorption at 122°F (50°C) ≤ 0.25%, per ASTM D570
Sealing of Ends Not necessary
Greasing of FRP Dowels Not necessary
Glass Transition Temperature 230°F (110°C) per DSC method
  • High speed tollways
  • Jointed concrete paving
  • Canals and water ways
  • Connections to Mechanically Stabilized Earth Structures
  • Industrial flooring needing electromagnetic transparency


Part Number Concrete Thickness Dowel Height Dowel Spacing*
  mm in mm in cm in
DBB1500-12-5 254 10 127 5 305 12
DBB1500-10-6 305 12 152 6 254 10
DBB1500-12-6 305 12 152 6 305 12

*Dowel bar spacing is easily adjusted by nesting support chairs on a second #3 rebar runner or spacing dowel bars further apart.

Handling and Placement

Field cutting of Fiberglas™ Dowel Bars is generally not necessary. However, if required use a fine blade saw, grinder, carborundum or diamond blade. We use a diamond blade in wet bath for cutting the dowels. Sealing of Fiberglas™ Dowel Bars ends is NOT necessary. Greasing of Fiberglas™ Dowel Bars is NOT necessary (the bond strength to concrete is sufficiently low.)

When Installing Dowels in the DBB1500-10-6 Basket:

• Press fit the Dowel into the opening. • Tap the dowel into the basket from the end to secure the dowel into place. • Attach the dowels and baskets to the runners as required.


Talk to an Expert

Douglas Gremel

Director, Engineering – Infrastructure Solutions

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Ashish Gandhi

Business Manager, PINKBAR™️

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Mikhail Vorobiev

Business Development Leader

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