FRP Handrail Case Study: Coastal Walkway Railing Replacement

Project Background

The walkway runs parallel to the shoreline and receives regular pedestrian use throughout the year. The existing carbon steel railing had been galvanized and painted, but visible rust had developed after continued exposure to salt, moisture, and sunlight. Touch-up painting was needed on affected sections, and rust flakes had developed around some joints and base plate areas.

Because the walkway remained in public use, the replacement work was completed in sections to limit disruption to pedestrians. The installation also required an approach that could be handled on site without cranes or lifts for the railing components.

Material Selection

HotFRP supplied a fiberglass reinforced polymer (FRP) handrail system for the replacement. Unlike carbon steel, FRP composites do not form iron rust, which is one reason FRP handrail systems are used in corrosive environments where salt exposure and moisture are practical considerations.

The supplied system used a smooth finish in a neutral color. The handrail and mounting components were arranged to suit the existing post spacing, allowing suitable existing foundation locations to be reused where site conditions permitted. This approach reduced the need for major changes to the walkway during the replacement.

Installation Notes

Installation was completed in sections while the walkway remained partially open to pedestrians. The FRP components were manually handled and positioned along the walkway, so cranes or lifts were not used for the railing sections. Mechanical fasteners were used at the connection points, and the main railing sections did not require field drilling during installation.

Where the existing concrete curb and base plate locations were suitable for reuse, the replacement posts were installed at those locations. A small number of end caps and corner pieces were trimmed to fit. Cut edges were sealed with resin before final assembly to protect exposed glass fibers at the processed locations.

Outcome and Observations

In the reported post-installation observations, routine cleaning with water was sufficient to remove salt residue, and no repainting had been reported at the time of those observations. The handrail surface also remained smooth during the reported period of use.

In this project, the FRP handrail replacement addressed the visible corrosion concerns associated with the original steel railing while keeping the installation compatible with an active public walkway. Material selection, manual handling, and reuse of suitable existing foundation locations were important practical considerations in carrying out the replacement.