This had a profound impact. The amount of steel needed to build suspension bridges could be hundreds of tons less than required by previous design practice. Less steel greatly reduced the cost of a bridge. By the late 1920s and into the 1930s great long-span suspension bridges were being built across the country.
Waltham, Massachusetts. Waltham (/ËwÉËlËÎ¸Ã¦m/) is a city in Middlesex County, Massachusetts, United States, and was an early center for the labor movement as well as a major contributor to the American Industrial Revolution.
Stratham, New Hampshire. Homefacts City Report. Stratham is located in Rockingham County, NH. The population is NR. There are 3 public schools in Stratham with an average Homefacts rating of A. The total crime rate for Stratham is very low, and there are 2 registered sex offenders residing in the city.