Experience, expertise and equity in the trades 

Sheet Metal Air Rail & Transportation Local 100 provides top quality advocacy, support and employment services for skilled sheet metal workers in the Washington D.C., Baltimore, Cumberland, Richmond, Roanoke and Norfolk regions. We care about quality construction because we live in the communities where we build. From drawing boards to grand openings, our members are true partners in the growth of our communities while receiving best-in-class wages and benefits.

We ensure fair wages, job safety, quality health care, pensions, training and more to support all generations of skilled sheet metal workers.


SMART’s history is made up of the histories of the Sheet Metal Workers’ International Association and the United Transportation Union, which merged in January of 2008. Combined, these unions hold over 200 years of history and tradition which continue today.

The Tin, Sheet Iron, and Cornice Workers’ International Association was established on January 25, 1888 in Toledo, Ohio. In 1904, the union was renamed the Sheet Metal Workers International Alliance and moved its headquarters to Kansas City.

In 2011, the merger of the United Transportation Union and the SMWIA was confirmed by arbitration, and the union officially became the International Association of Sheet Metal, Air, Rail and Transportation Workers (SMART). In 2013, SMART received its official charter from the American Federation of Labor and the Congress of Industrial Organizations (AFL-CIO).

Today, SMART serves more than 200,000 members across the United States. Learn more about all of SMART’s national efforts.

Sheet metal workers group picture


Whether you’re a current member, job seeker, or just interested in learning more about our local, we’re here for you. Reach out today for information or assistance and someone from the SMART Local 100 team will get back to you. Here’s how to get in touch:

Sheet metal worker with safety mask