Alternating Tread Stairs

Our alternating tread stair designs achieve a shorter horizontal span than traditional stairs and are ideal for many commercial and industrial applications. We offer a wide range of custom and standard sizes. Similar to a Duvinage spiral stair, every alternating tread stair is expertly sized and specified for a specific application. A variety of materials are available, including steel, stainless steel, and aluminum. Stairs can be finished in primer or air-dry paint, powder coated paint, or galvanized.

Benefits of Alternating Tread Stairs

Alternating tread stairs are often used in industrial and commercial applications due to their unique features: space saving, available to wide range of angles, and adaptable to different facility requirements. The slope of alternating tread stairs can be as high as 68 degrees as opposed to standard stairs which are almost always less than 45 degrees. The only other alternative in such limited space would be a ladder which requires a backward-facing descent. Alternating tread stairs allow for a forward-facing descent.

Ideal for mezzanines, roofs, roof hatches, production lines, parapets, process equipment access, catwalks, storage tanks, emergency egress, and loading docks.

Alternating Tread Stair Product Lines


Alternating tread stairs made in steel provide strength and durability. Galvanized steel or Stainless steel offers an additional level of rust resistance.


Alternating tread stairs made in aluminum are lighter than steel and provide corrosion resistance for external or harsh environments.

Custom Stairs and Ladders

Whatever your application, Duvinage engineers can design the most approprate stair for your application.

Get Started Today!

Get a Quote

Request a free quote →

Find a Sales Rep Near You

Select your location below.