Palisades Interstate Parkway Helix Ramp Replacement
Constructed in 1952, the Palisades Interstate Parkway (PIP) Helix bridges are critical to transportation in the New York/New Jersey region because of their location relative to the George Washington Bridge (GWB). Structural and seismic analyses of the bridges indicated that they were near the end of their useful life and not performing as designed.
Arora Engineers, Inc. (Arora) provided design and construction phase services for temporary and new Helix ramps to replace the existing Helix ramp connecting the PIP to the Eastbound I-95 roadway and the GWB. The design included electrical and fire protection engineering services for both temporary and permanent new ramps, fire/life safety code review, coordination with Authorities Having Jurisdiction (AHJ), fire suppression dry stand-pipe system, and construction administration.
Arora’s fire/life safety designers utilized state of the art hydraulic calculation software to analyze pressure drop and fluid delivery time. The electrical team also used advanced software to analyze voltage drops, load calculations, and lighting photometrics for the project.