TUFF SPAN

Nonmetal roofing; nonmetal siding; nonmetal building materials, namely, beams, structural channels, angles, tubes and flat plate sections, louvers, gutters, downspouts, ridge vents, roof vents, ducts, roof decks, and form decks; construction material, namely nonmetal exterior boards, nonmetal exterior panels, and fiberglass panels

Non-metal storage tank covers for commercial, industrial, water and wastewater applications