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...Pete Lewis explains how he believes the dynamic effects of vibration and the inappropriate use of cast iron, caused fatigue to the Tay Bridge and were responsible for its collapse. The Hatfield accident Professor Roderick Smith explains the cause of the Hatfield accident while others look at how the flaws of the Tay Bridge are still used as lessons for today's engineers....

...cast iron, Al, Co, stainless steels, Ti and Mg; requiring catalytic initiation – Cu, Ag and plastics. Surfaces which cannot be plated directly are Zn, Cd and Pb. Materials which can form coatings include the following: Ni-(8–12%)P Ni-B Ni-Co electroless Ni composite coatings (25–30% by volume) with coating thicknesses of 10–25 μm electroless Ni-SiC (7 µm size)...

...aluminium, and is hinged at the chainwheel bracket. This means that the chain and chainwheel are on the outside when the bicycle is folded, and the two wheels come together. In essence, Ritchie was inspired by the thought that he could do better. His two major criticisms were that the bicycle didn't fold well because the chainwheel, the dirtiest part of a bicycle, was...