Revolutionizing marina floating docks

Stainless steel is expensive and steel corrodes quickly in marine environments. Our client required a GFRP (glass-fiber reinforced polymer) rod system for their floating docks, to cope in a marina environment where there is a continual movement from erratic wave action caused by tidal changes and boat traffic.

GFRP pultrusions ideal in a marine environment

Understanding the commercial value of displacing steel, we worked with our customers to develop the GFRP thru-rod and nut system. A custom CNC grinder technology was developed to add an accurate thread to the rods.

Developing the GFRP system provided distinct advantages including: 

Zero Corrosion

Creep resistance

Fatigue resistance

Self-locking nut for minimal maintenance

A major advantage for the GFRP thru-rod and nut system is the self-locking nut. The stretch properties of the GFRP component developed, holds tension easier than steel keep the nut tight. This reduces the need for ongoing maintenance and associated costs.

Testing in high salinity and high temperature waters showed excellent results, with almost no long-term strength reduction. The system offers significant cost savings compared to galvanized or stainless steel bolts at is better for the environment with no rusts or chemicals entering the waterways. Stronger than stainless steel and lightweight for easier installation, FRP thru-rod and nut is viewed as the biggest leap forward in marina design innovation in the last 25 years.

The FRP thru-rod and nut system is a patented technology.

Check out the newly upgraded Marina Del Rey Marina in California using the GFRP thru-rod system.