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Concrete In Australia : March 2011
34 Concrete in Australia Vol 37 No 1 FEATURE laminates are normally supplied in rolls, having either a 1.2 mm or 1.4 mm thick section (Figure 2) and in E-Modulus grades of 170 GPa and 210 GPa. BASF introduced the concept of "custom made" sections for the carbon laminates, where the designer may consider the possibility of having a more appropriate mix of section size, modulus and strength. Redesigns based on these new parameters, led to special sections being designed and subsequently manufactured for the project. ese included a 120 mm wide x 2 mm thick laminate of Grade 210 GPa and a unique 100 mm wide x 4 mm thick profile of Grade 260 GPa (used on the cantilevers, as seen in Figure 3). Due to the thickness and stiffness of these particular laminates, transport needed to be via pre-cut sections, loaded into timber crates (Figure 2). is method of delivery was ultimately seen as a major advantage to the quality systems adopted on the project due to the ability to individually number each piece and thereby have full traceability for total quality approach. e sheer scale of the West Gate Bridge project demanded the use of a "custom made" solution; a solution that would not be considered for "normal" sized projects. In fact, based on the volume of carbon fibre finally installed, the project is at least three times the size of any previous carbon fibre strengthening project in the world. Not surprisingly, the construction team of the WGBSA immediately saw the advantages of these sections. e total length of laminate reduced from the proposed 100 km of Figure 2. Typical roll of carbon fibre laminates with protective peel-ply and (left) thicker, flat "custom made" sections in timber packaging.