In 2017, the Delaware River Joint Toll Bridge Commission (DRJTBC) launched a 5-year project to replace the Scudder Falls Bridge with a dual-span steel multi-girder toll bridge with six thru-travel lanes, three auxiliary lanes, shoulders and a dual-use walkway. The parallel structures carry I-295 traffic between New Jersey and Pennsylvania. The design engineer for the project specified a Fiber Reinforced Polymer (FRP) bridge drainage system for the spans, but galvanized steel was the material of choice for the conduit. A value engineering proposal prepared by United Fiberglass revealed that replacing steel with fiberglass conduit offered substantial weight savings, increased the bridge’s life expectancy and improved crew safety during installation.
Lighter Weight for Longer Life
Twelve 4-in. galvanized steel conduit segments were originally specified for each span of the steel and concrete bridge. Adding weight to a new span can impact its longevity. At 10.3 lbs. per foot, the galvanized steel product weighed a total of 215,064 lbs. XW extra heavy wall FRP conduit weighed just 2.5 lbs. per foot for a total of 59,508 lbs. In a value engineering proposal, United Fiberglass demonstrated its ability to save DRJTBC 155,000 lbs. by switching from steel to FRP. In addition to extending the bridge structure’s life expectancy, the composite product’s lighter weight also made installation easier and quicker at a job site with limited access.
FRP Conduit
United Fiberglass conduit products can be used almost anywhere that PVC, rigid steel and other conduit materials are found. Lightweight and corrosion resistant for use in harsh environments, United Fiberglass has engineered its products to meet stringent performance standards for safety and quality. FRP conduit has a high strength-to-weight ratio and offers the longest life cycle of any conduit system.
