Over the last 40+ years, Washington State Ferries (WSF) has installed passenger overhead loading systems (OHL) at key busy commuter terminals, allowing walk-on passengers to load directly to the vessel passenger deck without crossing the vehicle transfer bridge. Aside from reducing vessel load/unload times, these systems provide an overall safer environment for pedestrians, and have proven to be a valuable asset for addressing ADA requirements. Each OHL system consist of a passenger loading cab that adjusts up or down to match the ferry vessels’ passenger deck elevation, along with a series of pedestrian gangways spanning to both the vessel and back to the terminal building. Because of the wide variation in tides and vessel free-boards, loading cabs are typically provided with 25 foot of vertical travel. The earliest loading cabs were provided with counterweight systems and positioned using wire rope hoists, which were supplanted in 1980’s and the 1990’s by hydraulically operated Loading Cabs. The design of the next generation of OHL systems slated for installation at WSF’s Mukilteo and Colman Dock Terminals. Early in the 30% design phase of the Mukilteo project, it became clear that the past designs needed to be updated to account for current ADA standards, seismic design criteria, operational and maintenance improvements, and to accommodate recent improvements in hydraulic/electrical control technologies. Earlier designs focused almost exclusively on the structural/heavy mechanical features, while space provisioning for mechanical and electrical equipment took a back seat to minimizing cab footprint. Given these challenges, the design team took a fresh look at the OHL system with the goal of adopting features/concepts from the earlier designs that worked well while fixing the features that were problematic. This approach resulted in an OHL Cab design significantly different than was initially envisioned, but that will be much easier to operate and maintain than the existing systems. This paper will discuss an overview of the OHL system and specific improvements made to the previous 1990’s design.


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    Titel :

    Innovative Upgrades to a Passenger Ferry Loading System


    Beteiligte:

    Kongress:

    14th Triennial International Conference ; 2016 ; New Orleans, LA


    Erschienen in:

    Ports 2016 ; 264-272


    Erscheinungsdatum :

    2016-06-06




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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