The early iron road and rail bridges were built at the beginning of the 19th century;only a few decades later, the first remarkable engineering structures followed from the new material concrete.They were designed and built in the competition against the increasingly daring - compared to the new building materials but too expensive - stone bridges of daring engineers.Some of these noteworthy examples of civil engineering have survived to this day;they are history to touch.The guide aims to give architectural students, architects and interested professionals access to some of these outstanding structures with detailed directions and important pointers to their development and emergence.
