Application Guidelines

The following general requirements and recommendations are provided for using V-ROD fiberglass rebars in the construction of reinforced concrete structures.

Handling and Storage

V-ROD reinforcing bars, while inherently very durable, are made with a matrix of synthetic resin rendering them liable to surface damage if abused. Deep scoring by sharp objects will reduce their durability and performance capacity; therefore care is advised in the handling of these materials during storage and placement. When conditions on the job site permit, bars should be delivered to a storage area. FRP bars are more tolerant of handling, storage, and placement variations than epoxy-coated bars, but need to be more carefully handled than uncoated steel reinforcing bars.

The following specific storage and handling guidelines will minimize any damage to the bars or the bar handlers:

Placement and Assembly

Placing of V-ROD reinforcing bars is done in a similar fashion to steel bars. Unless otherwise specified in project specifications, the bars should be placed within the tolerances specified in ACI 117 (“Standard Tolerances for Concrete Construction and Materials”). Common placing practices should apply with the following exceptions:


V-ROD is a thermoset composite, and cannot be bent after it has been polymerized (cured). Since it is shipped in a fully cured form, it cannot be bent on job site. Bends can be produced during the manufacturing process in most shapes that can be obtained with steel rebar, although typically a little more generous bend diameter will be required. As a general guideline, multiplying the bar diameter (in inches) by a factor of 4 will give you an approximate minimum bend radius for a 90-degree bend. Similarly, multiplying the bar diameter by a factor of 8 will give you the minimum bend diameter for a 180-degree bend. In any job where bending dimensions are critical, bending capability should be verified prior to placing an order. Based on testing, approximately 50% of the guaranteed design strength of a straight bar is retained after making a bend.

Quality Control

V-ROD meets ISO 9001:2000 standards. Through routine sampling and inspection, quality control tests are carried out during production to ensure that products meet all specifications and are within exacting dimensional tolerances. Certification to these results is available by prior request.

Test reports are also available from third-party independent testing agencies and universities regarding specific product performance in the following areas: