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<br />Rib Erection <br />To reduce disruption to traffic and duration of lane closures, we propose precast rib brackets and exterior <br />diaphragms between the FUBs. The rib strength capacity will be developed through mild reinforcing <br />therefore eliminating any post-tensioning activities and reducing construction time. These rib elements <br />can be lifted into place and tied to the FUBs with a cast-in-place interior diaphragm. Strongbacks will be <br />placed across the FUBs to support the precast brackets and external diaphragms. Note that this system <br />also provides the contractor the flexibility to cast-in-place the elements if that provides efficiency. <br /> <br />INSPECTABILITY & MAINTAINABILITY <br />In order to successfully execute the project process, we will need <br />FDOT Maintenance Office approval of the Bridge Park structures <br />accessibility to safely and effectively perform the federally required <br />biennial inspection program. Our concrete FUB concept does not <br />require access to the interior of the box girders eliminating the need <br />to provide an maintain inspection access hatches, lighting, <br />ventilation, vermin deterrence, and access security considerations. <br /> The Bridge Park is located within and extremely corrosive <br />environment in which the material of choice is prestressed concrete. <br />Steel structures are used in these environments only when necessary to <br />meet weight, span length, or geometric demands that cannot be <br />satisfied economically by concrete systems. For example, drawbridges <br />over the intracoastal waterway and Miami River use steel girder systems <br />for the movable span while the adjoining approach spans are comprised <br />of prestressed concrete. Curved fly-over ramps typically use steel beams <br />to achieve the tight radius geometry. In these cases, the bridge owners <br />Rib Erection Support Schematic <br />H&H concept eliminates need for <br />inspection access hatches, <br />lighting, ventilation, vermin <br />deterrence, and access security <br />considerations. <br />Our concept for the Bridge <br />Park achieves the complex <br />geometry, span demand, <br />and aesthetic finish with <br />concrete elements that do <br />not required expensive <br />structural coatings