Case Studies

Kellogg Lake Pedestrian Bridge – Milwaukie, Oregon

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Project Overview

FRP Deck Manufacturer: Composite Advantage
Engineer of Record: Stacy and Witbeck
Contractor: Stacy and Witbeck
Owner: City of Milwaukie

Project Description

This pedestrian bridge is part of the Portland-Milwaukie Light Rail Transit Project to expand transit access and make improvements to bicycle and pedestrian facilities. A steel truss bridge was fully assembled and then slid into place underneath a vehicle bridge. Light weight was important to minimize truss and installation costs. The light weight deck enabled this long single span to be constructed with cost-effective steel tubing. The FRP deck was delivered to the truss bridge supplier, Big R Bridge in Colorado, where the deck was installed on the truss sections. The assemblies were then transported to Oregon. This simplified on-site installation.

The deck size measures 234 by 12.25 feet, and each deck panel measures 9.75 feet by 12.25 feet. The deck is 3.75 inches deep, and the total area of the deck surface is 2,865 square feet.

The surface of the bridge deck was coated with an epoxy aggregate non-slip coating. The products used in this installation were prefabricated FRP bridge deck panels, attached to the steel truss using mechanical fasteners and clips.