Steel Stacks

Hoffmann, Inc. is a full-service/single source steel stack contractor providing custom design and engineering, project management, metal fabrication, and site erection services. Steel stacks are engineered in varied configurations to meet ASME STS-1 2006 standards and offer structural integrity to match the conditions in which the stack will operate.

Hoffmann can take your exhaust stack project from the design phase through final installation. We call this the “One Contractor Advantage”. Listed below are the reasons why Hoffmann should be your steel stack provider.

Why choose Hoffmann Steel Stacks?

Hoffmann’s state-of-the-art fabrication facility has over 70,000 square feet committed to custom steel fabricated products and steel stacks.

Our Design/Build Team consists of in-house registered professional engineers and design technicians who have specialized experience in the design of steel stacks.

Hoffmann’s fabrication team pays attention to weld quality. That is why we have a full-time AWS certified weld inspector and AWS certified welders. Our shop also utilizes a subarc welder which also provides full penetration welds with limited to no beveling.

Hoffmann’s one source capabilities include the design, fabrication, and installation of ductwork. We can also fabricate required structural steel, supports, expansion joints, platforms, ladders and handrail.

Our job shop has an overhead crane height of 35 feet and additional outside lifting capabilities. A large electric and natural gas energy company relied on Hoffmann to fabricate two carbon steel stacks, 165’ high x 19’ diameter and were shipped by barge in four 82’ sections. These larger stack sections reduced on-site erection time.

Our Industrial Services crews provide off-site fabrication and field erection services throughout the continental United States.

Hoffmann’s “One Contractor Advantage” also includes concrete construction services. Our concrete foundations are engineered in accordance with the steel stack design and our field crews can then perform the on-site construction.

Our steel fabrication facility, located near the Mississippi River, has a unique location that allows us to resourcefully ship by barge, truck, or rail.

Pulp and Paper Chemical Recovery - Industrial Steel Stacks - Hoffmann, Inc.


  • Single Wall
  • Dual Wall Insulated
  • Guyed
  • Free Standing
  • Tower Supported
  • Single Flue
  • Multi Flue
  • Insulation and Cladding

Stack Materials

  • Carbon Steel
  • Stainless Steel
  • COR-TEN Steel
  • Fiberglass


  • Paint prep using steel grit blast
  • Single part paint
  • Epoxies
  • Application Specific
  • Zinc coatings suitable for temperatures up to 1,000 degrees Fahrenheit

Delivery and Transportation

  • Truck and rail shipping for smaller diameters
  • Barge shipping for large diameters