Capitol Steel Structures is AISC certified in all three categories: fabricator, erector, and metal deck installer.










Our Specialization
Design
For projects in the design phase, we develop the highest quality shop drawings utlizing the latest steel detailing softwares to be able to conceptualize every detail of the structural steel fabrication and erection.
Fabrication
Erection
We have the equipment and experience to take on steel erection projects of all sizes, from commercial spaces to sports arenas
News & Insights
Capitol Steel Structures Completes Steel Work for FARMASI U.S. Headquarters in Doral
Capitol Steel Structures proudly announces the completion of its work on the new North American headquarters and distribution center for
Capitol Steel Delivers Signature Bridge at University Station in Hollywood, Florida
The grand opening of University Station in Hollywood, Florida, showcased not only a major step forward in affordable urban development
FIU ASCE Students Tour Capitol Steel Structures for Hands-On Introduction to Steel Fabrication
Capitol Steel Structures proudly welcomed students from the Florida International University (FIU) chapter of the American Society of Civil Engineers
Capitol Steel Structures Partners with NASCAR to Support Ryan Ellis at Homestead-Miami Speedway
In a thrilling chapter for both NASCAR and Capitol Steel Structures, the steel manufacturing giant partnered with driver Ryan Ellis
Leadership Team
A WORD FROM THE CEO
Capitol Steel Structures is a story of family, hard work, and vision. Our journey began in 1973, when my father laid the foundation of this company with nothing more than determination, grit, and a willingness to take on small bolt jobs and deliver steel materials wherever they were needed. From those humble beginnings, he built a reputation rooted in trust, quality, and resilience.
Today, I am proud to carry forward his legacy as CEO and Founder, leading Capitol Steel Structures to international heights. What began as a small family endeavor has grown into a global construction force, yet our core values remain unchanged. We owe every milestone, every project, and every achievement to the strength of our loyal team.
As I often say: “We stay together – we grow together.”
This belief has guided us for over five decades and will continue to be the cornerstone of everything we do.
Ruben Diaz
Founder & CEO
Pablo Garcia
Vice-President of Operations
Javier Cintra
VP of Engineering/PM/Purchasing
Joaquin de Feria
Vice-President of Fabrication
Armando Amezaga
Project Manager
Alejandro Aleman
Senior Estimator
Felipe Basulto
Estimator
Our Promise & Values

Over 50 years experience
Capitol Steel Structures is an AISC Certified Steel Fabricator and Erector (BU-CSEA-MEE) Founded in 1973, originally named as Capitol Rental Building Equipment.

High quality products
Our partnership with our clients is based on mutual trust and we do what is best for our clients following our company’s values and methods.

Professional standards
To become an industry leader, it is important for us to encourage team work in order to solve any construction challenges and to achieve excellent results.
Our Projects
Custom
Arkup
Educational
Slam Bridge
Sports
Super Bowl
Commercial
Acorn
Residential
North Miami Beach
Housing
Senior Center