Rachel Whiteread Monument, 2001 Senior Designer Project Manager Brief To realise artists conception of a clear, inverted facsimile of the granite Fourth Plinth at Trafalgar Square. Research, design, engineering and fabrication of two moulds and core moulds for casting. Materials development of a "Water Clear" resin capable of withstanding the stresses of such a large scale casting. Glass transition analysis. FEA and material properties/structural analysis. Execution of casting the two halves. Hydraulic control systems to allow shrinkage of material during curing. Post production machining of mating surfaces, travel frames, transport, installation. Construction Two aluminium moulds with cores, Steel external superstructure, Steel internal core structure with hydraulic piston shrinkage control system. Materials 12.6 Tonne Water-Clear polyurethane resin, Cast urethane gaskets, Steel, Aluminium Commission Public Arts Development Trust, Westminster Council and Anthony D'Offay Gallery -London. Location Fourth Plinth at Trafalgar Square, London Size 5mL x 4.5mH x 2.5mW