STF Iron, Inc.

CSLB# 1088997

We work with structural steel, engineering, fabrication, and erection with expertise companies from the San Francisco Bay Area to the Sierra Nevadas depend on.

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We work with structural steel, engineering, fabrication, and erection expertise companies from the San Francisco Bay Area to the Sierra Nevada Mountains.

We are committed to providing our customers with outstanding steel products and related services that meet or exceed expectations. Our experienced capable staff can guide you through the process from your initial call to engineering, fabrication, and installation. Our broad range of products and comprehensive services allow us to offer a comprehensive full package from a single shop. We look forward to finding out how we can put our experience to work for you!

In 2021, STF Iron joined the Yosemite Welding Family expanding our reach, services, number of experienced expert technicians, and our ability to provide the best services in the region.

Serving All Of

Northern California

Our experienced team of contruction, erection, and welding experts are trusted by clients across the state to get it done right and on time. Contact us to find out what we can do for you.


Expert steel fabrication, installation, and erection, from multi-story structural steel buildings to handrails and accessory structures.

Structural Steel

We fabricate and erect steel structures and frames for projects ranging from multi-story buildings to accessory structures and accents, including installing steel beams and columns to brace other building materials such as concrete and wood.

Expert Erection

We employ an experienced expert steel erection team. And with in-house engineering and fabrication we can offer a full erection service package. From steel roofs, frames, or stairs for multi-story parking structures to store fronts we can provide a full-service proposal for your project.


From in-house engineering to our expert fabrication and on-site erection services, STF Iron can deliver complex structural products whether stairs for multi-story building, or steel structures and metal accents. We serve all major industries from the Food and Wine to Industrial and Commercial Constructions.

Misc. Steel

Miscellaneous Steel is essential and often an intricate aspect of many buildings, structures, and related projects. These can be anything from a small store sign, a corporate logo on a building, staircases and handrails, curb angles, hangars, ladders, mansard frames, and supports for mechanical units.

Contact Us


647 Galaxy Way
Modesto, CA 95356
Phone: (209) 874-6140

Hours: Monday-Friday 7:00am – 4:00pm