A Trusted Name in Structural Steel

About Us

Located in Lewistown, Montana, Allied Steel is a second-generation family-owned structural steel fabricator with a rich history dating back to its founding in 1980 by Jim Southworth. Operating out of a renovated U.S. gypsum mine processing facility, Allied Steel has grown to employ a dedicated team of 100. With a reputation for knowledge and durability, Allied Steel has become a trusted name in the structural steel fabrication industry, serving clients across the United States, specializing in logistics to Alaska and Hawaii.

Certifications

Allied Steel holds the prestigious AISC (American Institute of Steel Construction) quality certification, the most recognized national certification program in the structural steel industry. This certification sets the standard for quality, ensuring that participants meet rigorous criteria in personnel, organization, experience, procedures, and equipment. The AISC certification confirms to owners, designers, the construction industry, and public officials that certified companies like Allied Steel have the expertise and commitment to quality required for fabrication, manufacturing, and erection.

The AISC program emphasizes building quality from the start by focusing on error prevention rather than error correction, ensuring that the entire process of fabrication and erection is managed with precision and reliability.

With a commitment to excellence and a proud legacy, Allied Steel stands as a pillar of strength and stability in the industry.