MD Facilities, LLC, based near Graham, Texas, specializes in custom-engineered steel structures for sports and educational facilities. The company designs and builds press boxes, observation towers, dugouts, and dugout roofs, working with clients to develop detailed plans before construction begins.

Porta-King manufactures modular and prefabricated building systems from its headquarters in Earth City, Missouri. Since 1969, the company has designed and built in-plant offices, guard booths, modular cleanrooms classified to ISO standards, modular wall partitions, equipment enclosures, mezzanines,