Below is a list of Stair Treads manufacturers from Chicago, Illinois. Stair treads are permanent slip resistant surfaces that are attached to stairways in factories, workplaces, outdoor areas and other areas in which a slip-proof stair is required. Typically fabricated from metals such as aluminum or steel, although fiberglass grating or plastic grating can also be used, stair treads are available in a wide range of sizes, nosing options and construction methods.