Source: US. Bureau of Labor Statistics
Release: Employment Situation
Construction employees in the construction sector include: Working supervisors, qualified craft workers, mechanics, apprentices, helpers, laborers, and so forth, engaged in new work, alterations, demolition, repair, maintenance, and the like, whether working at the site of construction or in shops or yards at jobs (such as precutting and preassembling) ordinarily performed by members of the construction trades.
The series comes from the 'Current Employment Statistics (Establishment Survey).'
The source code is: CEU2000000016
US. Bureau of Labor Statistics, Indexes of Aggregate Weekly Hours of All Employees: Construction [CEU2000000016], retrieved from FRED, Federal Reserve Bank of St. Louis; https://fred.stlouisfed.org/series/CEU2000000016, August 30, 2016.