SPENCER DOCK BRIDGE The 40 metre span bridge with its fluid lines and undulating concrete surface will take trams, traffic and pedestrians across the Royal Canal. The edges of the deck peel down to reveal a space for pedestrians to pause and take in views of the dock and Linear Park which is currently under construction. The underside of the bridge merges with the piers in a single movement with joint lines in the concrete designed to accentuate the geometry of the form. The finish of the concrete provides high visibility against the dark water of the canal and at night the structure will be vibrantly lit from below giving the bridge a significant presence. The proportions of the bridge are unusual so we took this as an opportunity to consider the bridge as a piece of landscape design. The soft geometry and asymmetry of the design creates a piece of infrastructure that resolves the tension between form and function. The bridge has been constructed from an innovative combination of in situ and precast reinforced concrete. The Formwork for the sculpturally formed bridge soffit was milled from high density expended polystyrene and coated in resin to achieve a smooth surface finish suitable for maritime environments. The formwork was milled directly from our 3D parametric models, providing a very high level of control over the geometry. This innovative use of CNC cut polystyrene is to date the largest application of the material to be used in this way. The concrete edges were precast off site and incorporate recessed lighting and the stainless steel balustrade infill bars. White limestone and cement was used in the concrete mix to achieve a white finish which gives it a high visibility against the dark water of the canal. Constructed using a combination of white in situ and precast reinforced concrete, all formwork is milled directly from 3D parametric models. The bridge is the centrepiece of the new extension to the light rail line in Dublin city centre and part of a larger regeneration project for the inner city and former docks. Commissioned as Future Systems, the bridge is one of the first major projects completed under the name of Amanda Levete Architects. The bridge will be fully operational in 2010 to coincide with completion of the Linear Park. Client: Dublin Docklands Development Authority Railway Procurement Agency Location: Dublin Program: Bridge for vehicles, tram and pedestrians Contract Value: €4.5 million Project Architects: Amanda Levete, Alan Dempsey AL_A Team: Peter Feldman, Jordy Fu, Alvin Huang, Theo Sarantoglou Structural Engineers: Arup

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