Business Details
50+ Years
experience
Trusted Structural Steel Fabrication Services in Riverside, CA
For over 50 years, Allied Steel Co has been a trusted leader in structural steel and metal fabrication, serving public and private agencies across Southern California. As a licensed subcontractor and proud member of the Steel Fabricators Association (SFA) and the American Institute of Steel Construction (AISC), we combine decades of expertise with a commitment to precision, safety, and client satisfaction. Our team of highly skilled ironworkers delivers complex projects ranging from water treatment plants to multi-story steel structures, maintaining a reputation for excellence since 1944. With a state-of-the-art 60,000 sq. ft. facility in Riverside, CA, we provide end-to-end solutions from fabrication to installation, adhering to rigorous AISC certification standards.Our family-owned business has partnered with hundreds of general contractors to shape Southern Californias infrastructure, including landmark projects like the Skinner Treatment Plant and Prado Dam. We prioritize safety, innovation, and meeting deadlines while fostering apprenticeships through Local Unions 509 and 433. Since relocating to Riverside in 2011, weve continued to invest in advanced equipment and processes, ensuring top-tier craftsmanship for every client. Our leadership team, including fifth-generation family members, brings decades of industry knowledge to every project. This legacy of trust, technical excellence, and community investment defines Allied Steel Co Cos approach to serving clients across water treatment, sewage, and structural steel sectors.
Services
Structural Steel Fabrication
Miscellaneous Metal Installation
Water Treatment Plant Projects
Sewage Treatment Structures
Multi-Story Steel Buildings
Details
- Year established: 1944
Highlights and features
- We have over 50 years of experience in structural steel fabrication for infrastructure projects.
- Our team holds AISC certification for conventional and complex steel structures.
- We maintain a state-of-the-art 60,000 sq. ft. fabrication facility in Riverside, CA.
- Our union-trained ironworkers specialize in water treatment plant construction.
- We partner with Local Unions 509 and 433 to train the next generation of steelworkers.
Associations and certifications
- American Institute of Steel Construction (AISC)
Services
Structural Steel Fabrication
Allied Steel Co fabricates precision-engineered structural steel components for commercial and infrastructure projects. Our 60,000 sq. ft. Riverside facility utilizes advanced equipment like plasma pipe processors and 300-ton press brakes to handle projects valued up to $15 million. This service supports multi-story buildings, bridges, and industrial facilities requiring durable, code-compliant steel frameworks.
Miscellaneous Metal Installation
We install handrails, stairs, grating, and other metal components alongside structural steel projects. Our field crews specialize in integrating these elements with primary steel structures while maintaining safety and aesthetic standards. This service ensures complete solutions for facilities requiring compliant, durable metalwork in water treatment plants and commercial buildings.
Water Treatment Plant Projects
Allied Steel Co delivers steel systems for water and sewage treatment facilities, including oxidation tanks, filtration plants, and biosolids processing units. Our expertise spans projects like the Skinner Treatment Plant retrofit and Rialto Regional Biosolids Facility. These solutions combine corrosion-resistant materials and AISC-certified fabrication to meet stringent environmental and safety regulations.
AISC-Certified Fabrication
Our Riverside facility holds AISC certification for conventional and complex steel structures, ensuring compliance with annual inspections and rigorous quality standards. This certification validates our processes for fabricating high-integrity steel components used in critical infrastructure, from multi-million-dollar treatment plants to seismic-resistant commercial buildings.
Union Ironworker Projects
We employ union-trained ironworkers through Local Unions 509 and 433, supporting apprenticeship programs to maintain industry-leading expertise. This workforce executes projects requiring precision welding, erection, and installation while adhering to safety protocols. Clients benefit from consistent quality and adherence to union labor standards across all phases of construction.
People
Brian P. Chapman
President
Brian P. Chapman, President of Allied Steel Co, graduated from Brigham Young University with a Business Management degree. He joined the company in 1977 and has led its strategic direction for decades, ensuring continued growth and technical excellence.
Perry K. Chapman
Executive Vice President
Perry K. Chapman, Executive Vice President, holds a Communications degree from Brigham Young University. With over 40 years at Allied Steel Co, he oversees operations and has been instrumental in maintaining the companys AISC certification and union partnerships.
Nicky Chapman
Treasurer/CFO
Nicky Chapman, Allied Steel Co Cos Treasurer and CFO, manages financial operations and long-term fiscal strategy. Her leadership ensures the company maintains robust financial health while investing in advanced fabrication technologies and workforce development programs.
Jeff Chapman
Vice President of Operations
Jeff Chapman, Vice President of Operations, oversees day-to-day production and project execution. With decades of hands-on experience, he ensures all projects meet Allied Steel Co Cos standards for precision, safety, and timely delivery.
Chris Chapman
Vice President of Sales
Chris Chapman, Vice President of Sales, leads client relations and business development. He connects Allied Steel Co Cos technical capabilities with client needs, fostering long-term partnerships with general contractors across Southern California.
Questions
What services does Allied Steel Co Co offer?
We specialize in structural steel fabrication, miscellaneous metal installation, and infrastructure projects for water treatment plants, sewage facilities, and commercial buildings.
How long has Allied Steel Co Co been in business?
Since 1944, we’ve served Southern California as a family-owned steel fabrication and construction contractor.
Are you AISC certified?
Yes, our Riverside facility holds AISC certification for conventional and complex steel structures.
What areas do you serve?
We primarily serve Southern California, including Riverside, Los Angeles, and San Bernardino counties.
Do you work with union labor?
Yes, we employ ironworkers through Local Unions 509 and 433 and support apprenticeship training programs.
