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STRUCTURAL DESIGN Imp PEDELTA The deck is supported with one -single arch angled outward in the North side and is subject to both bending and torsion under the FDRN PIN asymmetric permanent and live loads. A \�\\ closed box girder is the most efficient cross- section to provide the required stiffness and �, \ strength to the structural system. The steel 1 tied girder consists of a trapezoidal cross- section 3 ft deep. Ribs of variable length are ` connected to the south web to complete the i platform width. The box girder is made up of 1 �� i DEcx EDGE stiffened plates. Following a preliminary FDRN PIN i / I)WKCOVER PLATE structural analysis, a closed sealed steel box "" EDGE SEMI girder has been selected. The use of full width BEARING BEAM top plate, instead of the most traditional \TIE Box BEAM \RNs solution using two separate top flanges welded to the webs and a concrete slab on top to close the box girder will be more efficient and durable. It will not require future inspections of the interior of the box girder, like most of the hollow cross section of trusses and arches The steel deck system is connected with an 8 -in depth concrete slab on top. The slab acts in composite action with the box girder and ribs to take advantage of the two materials. The concrete deck, unlike other lighter deck systems, provides the minimum mass and a higher damping ratio required to prevent excessive vibrations that would be, otherwise, uncomfortable for users. Our solution does not need Tuned Mass Dampers that, while reducing motions on the bridge, also require future detailed inspections and maintenance. Stainless Steel bars are specified for the reinforcing of the concrete deck slab to increase the durability and reduce future maintenance. Stainless Steel is consistently employed on bridge structures, barriers/railings and deck edge cover plate: typically, in a matte bead -blasted finish, with horizontal accents in linear brushed finish; provides a premium \ contemporary and long-lasting appearance. To prevent constructability issues and prevent delays, Pedelta Team will develop a BIM model of the bridge and approaches (Level 300), including / �\ existing adjacent utilities. The BIM model will be delivered to the City to help them manage the bridge. Sustainability and Extended Service Life The proposed design minimizes the amount of materials to be used, an under -recognized sustainability strategy, and utilizes advanced materials that achieve a long service life and will require very little maintenance, notably Duplex Stainless Steel. The use of Stainless Steel is one of the materials of choice in aggressive environments exposed to deicing salts and is reducing the overall cost of the ownership. City of Sunny Isles Beach Request for Qualifications No. 20-10-01 19-