Building Trades Council of South Central Wisconsin Upholding the tradition of building excellence. Building Trades Council of South Central Wisconsin Building Trades Council of South Central Wisconsin is comprised of 17 local building trades unions representing more than 6000 building trades members who live and work in our seven county area. Our members lead projects that generate local jobs and revenue while building community partnerships and helping to maintain our communities and infrastructure. The Council is affiliated with the Wisconsin State AFLCIO which works to ensure careers that are safe family supporting provide benefits and deliver respect and fair treatment for more than 12 million members of 56 unions throughout North America.