Allied Steel has spent the last 50 years concentrating our efforts on projects containing a blend of structural steel and miscellaneous metals work.

Area of Expertise

We have come to specialize in structural steel and miscellaneous metal fabrication and installation for water treatment plants, water reclamation plants, pumping plants, and sewage treatment plants.


In addition to fabricating steel structures, stairways, and canopies, we also fabricate many miscellaneous items including: handrail, spiral stairs, and other customized items made in our shop to specification.


Our experienced field crews specialize in not only the erection of structural steel, but also the installation of the miscellaneous metals we provide such as handrails, grating and stairs.


Allied Steel Co., Inc. is a licensed subcontractor in the State of California, License #164718 C51 (Structural Steel) and C23 (Ornamental Iron). We are also licensed by the City of Los Angeles, Department of Building and Safety (License #234) as a Type I Fabricator of Unlimited Weight Steel (USS), Reinforcing Steel, and Aluminum.

Local Union Supporters

All of our shop and field ironworkers are employed through our Local Unions 509 and 433. We also participate in the sponsorship and training of apprentices for the Ironworkers Apprenticeship Program.

AISC Certification

Our fabrication facility in Riverside, CA has earned the American Institute of Steel Construction (AISC) fabricator certification for conventional and complex steel building structures.

AISC awards the certification to companies that are inspected yearly and undergo a rigorous evaluation. The certification is an example of our commitment to top notch personnel, knowledge, organization, equipment, experience, capabilities, procedures, and the highest quality products.