As the Athletics look to move up in the Major League Baseball (MLB) American League West standings, their new home stadium in Las Vegas has reached a major milestone. Crews lifted the first 200-ton arch truss segment into place on Monday, marking the start of roof construction on the 33,000-seat ballpark.

The stadium’s long-span roof features five overlapping curved surfaces designed to look like baseball pennants, supported on freestanding steel arch trusses that will span nearly 700 feet across the playing field. Thornton Tomasetti is the structural engineer for the stadium, working in collaboration with the design team of BIG – Bjarke Ingels Group and HNTB. Mortenson-McCarthy Building Companies, Inc. joint venture is the construction manager.

The roof structure will reach 290 feet above the playing field. The park will also feature one of the world’s largest cable-net glass façades in the outfield, which will provide expansive views of the famed Las Vegas Strip.

In addition to structural design, Thornton Tomasetti are providing construction and façade engineering, connection detailing, and waterproofing and façade access services. The stadium is scheduled to open for the 2028 baseball season.