The culprit is a molecule called gliadin, which is found in certain gluten-containing grains and causes symptoms in gluten-sensitive people. The grains that cause the greatest problems are wheat, rye, barley, spelt, and kamut; whereas corn, rice, millet, and buckwheat are generally considered safe.
The Forth Bridge's piers are constructed from 120,000 cubic yards of concrete and masonry, faced with 2 ft thick granite. 200 trains use the bridge every day, carrying 3 million passengers each year. The total painted area of the Forth Bridge is 230,000 sq metres, requiring 240,000 litres of paint.
Materials used to construct the Sydney Harbor Bridge include: About  6,000,000 steel rivets, 2,800 tons steelwork, including arch and  mild steel approach spans, 122,000 cub â¦ ic meters of rock was  excavated for foundations. Sixteen construction workers lost their lives during the bridge's construction.   16 construction workers died during the building of the Sydney Harbour Bridge.