Kirby Building Systems, LLC has been a leading manufacturer of custom-engineered, high-quality metal building systems for commercial, industrial, institutional, recreational, aviation, and many other specialty metal building applications. 

With a full-service plant located in Portland TN, we specialize in custom-engineered construction solutions, encompassing multiple building components, framing options, extended bay options, special exteriors, multiple roof system options,  and industry-leading warranty protection programs.


Our History – A Tradition of Excellence

Kirby Building Systems began in 1955 as a general contracting firm in Houston, TX. By 1959, the company began to sell and fabricate its own line of steel buildings under the name of Mes -Tex Steel Buildings, with all product produced out of the Houston, TX plant. The business grew steadily, and within two years, the company began to sell metal buildings on a regional basis.

By 1964, a growing network of Authorized Builders had enabled the company to expand nationally. In 1966, the company was purchased by Kirby Industries, and was renamed Kirby Building Systems, Inc., and eventually moved production to Portland, TN. In August, 2007, we were acquired by Nucor Corporation , a Fortune 500 Company and was renamed Kirby Building Systems, LLC.

Today, Kirby Building Systems ranks as one of the top 10 manufacturers of metal buildings in the world, and is an industry-leading manufacturer of custom-engineered, high-quality and cost-effective metal building systems. With a tradition of excellence and industry experience dating back over six decades, Kirby’s quality products include complete framing systems, wall and roof panel systems, and extended bay options – all engineered and manufactured by Kirby teammates. Our customers and teammates alike are proud of the company, its products, and the level of service that Kirby provides today’s global construction.

Custom Pre-Engineered Steel Buildings

Kirby Building Systems is the best choice for your custom metal building needs. Our building systems and products are:

  • Supplied by an American company
  • Designed and detailed in America
  • Made from steel manufactured in America
  • Fabricated in American-owned facilities with American workers

The Kirby FOCUS

On-time Deliveries
Competitive Pricing
Unbeatable Service
Solutions that Work

Kirby’s FOCUS on quality and service results in building systems with solid advantages, including fast-response design, web-based estimating software, more detailed drawings, fewer pieces to erect, and complete buildings delivered on time, resulting in faster completion schedules.

Safety is our Culture

Kirby’s attitude toward safety couldn’t be clearer – nothing is more important than safety. Nothing!

Through hard work and dedication to continuous improvement of our safety culture, the Kirby teams have been recognized as having world class safety and health programs. Both the Safety and Health Achievement Recognition Program (SHARP) and Voluntary Protection Program (VPP) recognize and partner with businesses and worksites that show excellence in occupational safety and health.

We strive to send each and every teammate home safely to their family each night. Every teammate is responsible for his/ her safety while at the same time watching over their teammates around them. Our teammates are unafraid to approach another they see or believe is performing work in an unsafe manner.

Kirby teammates take health and safety personally. It is pride, commitment, and satisfaction in a job well done each and every day – safely. These achievements shine as models for workplace safety and health among our peers.

Kirby Steel Building Frame

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