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We provide a FULL LIFECYCLE of CUSTOM metal fabrication services under following procurement formats:

1. Bid → Build

2. Engineer → Design Build

3. Engineer → Procure → Construct

4. Standalone Fabrication

our advantages

Why Choose COI for your next project


In custom Product Lifecycle – we provide high quality repeat services to Engineer, Design, Detail, Fabricate and Erect projects for our diverse client base. Precision Fabrication & Erection is our constant endeavor.

Timely Delivery

It is our firm endeavor to work with all stakeholders to deliver a project on time and within budget.


We have the capability to deliver multiple large complex projects at the same time.


Our experience encompasses a wide range of metals including mild steel, stainless steel, aluminum alloys, stainless steel, bronze, copper alloys and brass. Our team consists of engineers, designers, skilled craftsmen and Union ironworkers that collectively bring hundreds of years of metal industry experience and tacit understanding of the entire product lifecycle to our clients.

Quality Control

We are an AISC Certified FABRICATOR & ERECTOR. COI maintains compliance with the AISC & NOMMA Standards along with appropriate statutory and safety requirements

Customer Service

COI is known in the industry for its customer focus, we work hard to achieve a 100% client satisfaction. Our company policy is to provide superior value while producing the highest quality products and services, meeting or exceeding the needs and expectations of our customers.


Fabrication & Assembly
Welding by AWS Certified Welders
Coatings & Patina
Quality Assurance

Questions? Call us today 773-321-9635 or send a email