The annual meeting place for both local and international building and civil engineering professionals, The BIG 5 is the largest trade fair for the construction sector and is an exceptional platform for companies and organizations to promote their products, services, and innovative technologies as well as meet decision-makers, investors, buyers from all over the world. Dutco Tennant LLC will be displaying their latest products for the Construction Specialities division in this event in collaboration with Nystrom.

Mr. James C. Nystrom founded the company in 1948 as an independent representative for a variety of building product manufacturers. Nystrom’s history has since been one of the firsts in the industry, from its marketing approach to manufacturing, all focused on simplifying and streamlining processes to serve customers. Nystrom revolutionized access panel distribution, providing direct access for contractors and allowing them to get the right product, right to the site. Nystrom was also an early adopter of the “Theory of Constraints” in manufacturing, doubling production while reducing more than half and reducing manufacturing lead times. Since then, Nystrom has continued the product line growth through acquisition, strategic partnering, and internal research and development to become the dominants U.S. player in commercial specialty building products with ten distinct product lines and a strong and growing international presence.

Nystrom Products  

At The BIG 5, visitors will get to explore their wide range of Access Door, Roof Hatch, and Floor Hatch.

Access Door

Nystrom’s Tile Ready Access Door is UL listed for openings that may require tile applications. When installed, the door and frame are concealed providing an aesthetically pleasing appearance. These doors are fire rated, uninsulated and provide access through openings in walls for ceramic tile applications. The door and frame are concealed when installed and provides an aesthetically pleasing appearance.


  • Fire-Rated
  • Self-Closing
  • Wall Tile Installation
  • Custom Sizing

Roof Hatch

The Personnel II Roof hatch is designed with compliance with OSHA life safety in mind provides easy access to roof areas. This roof hatch is simple to install and operate and is OSHA compliant, stays cooler and conserves energy.


  • GAS SPRING OPERATION Designed for a smooth one-handed operation that complies with OSHA safety standards, this roof hatch is easy to open and close.
  • CLEAR LABELING Color-coordinated labels clearly identify safety yellow pull down handle and red hold open arm release.
  • RAILING-READY Safety railings install quick and easy with predrilled counterflashing, designed to meet the 42" height requirement per OSHA and IBC.

Fire-Rated Diamond Tread Floor Door

Nystrom’s Fire-Rated Diamond Tread Floor Door is designed to contain a fire from penetrating through the opening. This floor door is reinforced for pedestrian traffic loads and features a diamond tread cover.


  • 2- or 3-hour Fire-Rated
  • Diamond Tread
  • Interior Use
  • Concrete or Wood Installation
  • 300psf, Pedestrian Load