AND ANSWERS 100% CORRECT!
Steel - ANSWER Predominate material in construction of bridges, towers, building and
other structures
Wrought iron - ANSWER Less carbon and workable in low temperature
Cast iron - ANSWER High carbon, easily melted, brittle in material, can be cast into
complicated shape
Typical application of structural steel - ANSWER Bridges
Museums
Towers
1777-1779 - ANSWER Metal as structural material
Cast iron used on a 30m arch span
Coalbrookdale bridge England
1840 - ANSWER Wrought iron replacing cast irons
Bridge of canton, Ohio
1780-1820 - ANSWER Number of cast iron were built during this period
1846-1850 - ANSWER Britannia bridge over Menai strait Wales was built
1855 - ANSWER Bessemer process- produce steel in larger quantity but cheaper prices
1989 - ANSWER Steel shapes having yield strength of 24000 to 100000 psi were
produced
Advantages of using steel - ANSWER High strength
Uniformity
Elasticity
Ductility
High strength - ANSWER The strength of steel per unit weight