U.S. ALUMINUM

Metal building materials made in whole or substantial part of aluminum, namely, architectural building entrances and framing systems consisting primarily of frameworks of metal, frameworks of metal for use in constructing storefronts, curtain wall systems consisting primarily of frameworks of metal, ribbon wall systems consisting primarily of frameworks of metal, impact and blast resistant building systems consisting primarily of metal, metal impact and blast windows, sun shade systems consisting primarily of metal building frames and windows, metal window mounts, metal sliding doors, and metal single hung, fixed, casement and awning windows