Workers in the construction special trade contractors industry perform building construction activities such as pouring concrete, site preparation and electrical work. Their work usually is subcontracted from a general contractor. Nearly 3.5 million people were employed as specialty trade contractors in 2011, according to the Bureau of Labor Statistics. The number of recordable injuries topped 123,000, and the rate was 4.1 per 100 full-time workers, which is a decrease from 4.3 in 2010 and 4.6 in 2009.
