Local Union #1 has been part of Illinois’ building trades tradition since the earliest days of the organized sheet metal trade. In 1887, Robert Kellerstrass—Recording Secretary of the Tin and Cornice Makers’ Association of Peoria—helped promote unity among local organizations and the formation of a national union. At the union’s first convention in 1888, Kellerstrass was elected General Treasurer.

Years later, as local numbers shifted, there was debate about Peoria’s right to the “#1” designation. Ultimately, in 1924, Kellerstrass drew the #1 designation out of a hat when the union’s name changed to the Sheet Metal Workers International Association—cementing Local 1’s place in union history.
In January 2008, the Sheet Metal Workers International Association merged with the United Transportation Union, forming the International Association of Sheet Metal, Air, Rail and Transportation Workers (SMART).
Local 1 proudly preserves this legacy—many historic items remain on display at our office, including early union banners, an 1888 journal, member badges, and original charters.
Today, Local 1 serves 10 counties with a membership of 700+ building trades journeymen, residential journeymen, apprentices, industrial members, and retirees. Sheet metal work remains a highly respected trade—one that demands precision, problem-solving, and skilled craftsmanship.
Local Union 1 supports members and signatory contractors through offices located in:
We are dedicated to providing an exceptionally skilled workforce for our signatory contractors and maintaining the standards that keep our trade strong.
Established in Peru, Illinois almost 50 years ago, Chapman's Mechanical Systems is a multi-generational family operation that evolved from a sheet metal specialist into a comprehensive mechanical contractor.
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The Second Annual Car Show was back on Saturday, September 13! Friends and family of Local Unon 1 gathered to admire classic and custom cars and enjoyed music and food trucks.
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In October, we came together for our annual Awards Banquet to honor retirees, long-serving members and apprentices. Your hard work and commitment have built a stronger union and a stronger community.
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